Respiration is the process of exchanging oxygen and carbon dioxide between an organism and the environment. The goal of respiration is to obtain oxygen and get rid of carbon dioxide. In fish and humans, respiration occurs through different mechanisms.In fish, respiration occurs through gills.
Gills are respiratory organs that extract oxygen from the water and release carbon dioxide. Water enters through the mouth and passes over the gills where oxygen diffuses into the bloodstream and carbon dioxide diffuses out. Fish also use a swim bladder to control buoyancy and maintain their position in the water column.
The swim bladder is filled with gas and fish can adjust the amount of gas to change their position in the water column.In humans, respiration occurs through lungs. Lungs are respiratory organs that extract oxygen from the air and release carbon dioxide.
Air enters through the nose or mouth and passes through the trachea into the lungs. In the lungs, oxygen diffuses into the bloodstream and carbon dioxide diffuses out. Humans also have a diaphragm, a muscle that contracts and relaxes to change the volume of the chest cavity.
This change in volume creates a pressure gradient that allows air to flow in and out of the lungs. This process is known as ventilation.In conclusion, while fish and humans both have the goal of obtaining oxygen and getting rid of carbon dioxide through respiration, they use different mechanisms to accomplish this goal.
Fish use gills to extract oxygen from water and release carbon dioxide, while humans use lungs to extract oxygen from air and release carbon dioxide.
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What is the result of adding these two equations?
−
5
x
−
9
y
=
3
5
x
−
9
y
=
−
2
−5x−9y
5x−9y
=3
=−2
Answer:
\( - 18y = 1\)
y=-1/18
Adding compost to farmed soil is better than adding synthetic fertilizer because: O compost contains disease fighting microorganisms that synthetic fertilizers lack. O synthetic fertilizers contain a great many microorganisms, some of which spread plant diseases. O compost contains carbon, and using only synthetic fertilizers can lead to a loss of soil carbon content. O synthetic fertilizers are adding the primary chemicals to the atmosphere that contribute to the ozone hole.
Adding compost to farmed soil is better than adding synthetic fertilizers for a variety of reasons. Perhaps the most important of these is that compost contains disease fighting microorganisms that synthetic fertilizers lack.
These microorganisms help to keep the soil healthy and reduce the chances of plant diseases. The microorganisms in synthetic fertilizers, on the other hand, can sometimes spread plant diseases.
Another advantage of adding compost to farmed soil is that it contains carbon. Over time, the use of only synthetic fertilizers can lead to a loss of soil carbon content, which is essential for healthy soil. In contrast, compost adds carbon and helps maintain the soil’s fertility.
Finally, it’s important to consider the environmental impact of synthetic fertilizers. Synthetic fertilizers are adding the primary chemicals to the atmosphere that contribute to the ozone hole. In contrast, compost is a natural product and does not contribute to environmental pollution.
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Which term do these characteristics describe?
The substance is mixed uniformly throughout and each part of the substance contains the same ratio of materials with the same properties.
Question 9 options:
A. homogeneous mixture
B. heterogeneous mixture
C. pure substance
D. compound
Answer:
a
Explanation:
The substance is mixed uniformly throughout, and each part of the substance contains the same ratio of materials in the same proportions, making it a homogeneous mixture. Option A is correct.
What is a mixture?A mixture is made up of different types of substances or compounds. Depending on the composition of the mixture, it is classified as a homogeneous mixture or a heterogeneous mixture. The mixture in which all the components are equally distributed and can't separate is called a homogeneous mixture. Example: The air has different gases, but they can't be separated by hand.
In a heterogeneous mixture, the compounds or molecules do not mix together properly and can be differentiated, such as the small pebbles in the bag of rice. Aluminum, gold, copper, and other metals are examples of pure substances as they are made up of single particle.
Hence, a substance is mixed uniformly throughout, and each part of the substance containing the same ratio of materials with the same proportions is a homogeneous mixture. Option A is correct.
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Non-recombinant
chromosomes
1.) What do the labels above represent? (for example: capital "A" versus lower-case "a", and
the different letters "A or B or C"?
2.) The crossing-over (regional exchange of genetic information) occurs between homologous
chromosomes. WHY is it critical that only homologous chromosomes exchange information?
3. Why is it important that crossing-over takes place between the chromosomes from two
different parents? (answer on back).
The labels above represent different alleles of genes located on chromosomes. It is critical that only homologous chromosomes exchange information during crossing-over because homologous chromosomes have similar genes in the same order.
The labels above represent different alleles (versions of a gene) that are located on the chromosomes. Capital letters represent dominant alleles, while lower-case letters represent recessive alleles. Different letters represent different genes, and their locations on chromosomes are also different.
It is critical that only homologous chromosomes exchange information during crossing-over because homologous chromosomes have similar structures and genetic content, making it possible for them to align and exchange segments of DNA. If non-homologous chromosomes were to exchange information, the resulting genetic material would be unstable and could lead to genetic disorders or other problems.
It is important that crossing-over takes place between chromosomes from two different parents because it increases genetic diversity in offspring. Each parent contributes one set of chromosomes, and crossing-over allows for the exchange of genetic information between these sets, leading to new combinations of traits. This is important for the survival of a species as it enables adaptation to changing environments and increases the chances of finding new beneficial traits.
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CHAPTER 12
LESSON
1 RNA
READING TOOL Compare and Contrast As you read your textbook, identify the similarities
and differences between RNA and DNA. Complete the Venn diagram to compare and contrast
these molecules. A sample difference has been entered for you.
Single stranded
As you read, circle
the answers to each Key
Question. Underline any
words you do not understand.
RNA
BUILD Vocabulary
ribonucleic acid (RNA) single-
stranded nucleic acid that contains
the sugar ribose
Both
146 Chapter 12 RNA and Protein Synthesis
DNA
Double stranded
Lesson Summary
The Role of RNA
KEY QUESTION How does RNA differ from DNA?
DNA contains a genetic code that living cells can read,
understand, and express. DNA is made of just four nucleotides
joined together in double-stranded molecules that can be millions
of bases in length. What exactly do those bases code for, and
how does the cell "read" that code? That's where RNA comes in.
RNA helps to put the genetic code into action. RNA, like DNA,
is a nucleic acid that consists of a long chain of nucleotides.
Genes contain coded DNA instructions that tell cells how
to build proteins. The first step in decoding these genetic
instructions is to copy part of the base sequence from DNA
into RNA. RNA then uses these instructions to direct the
production of proteins, which help to determine an organism's
characteristics.
Copyright Savvas Learning Company LLC. All Rights Reserved.
DNA and RNA have similarities in their nucleotide composition and involvement in genetic processes. However, they differ in their sugar type, strandedness, and specific functions in protein synthesis. Understanding these similarities and differences is crucial for comprehending the fundamental mechanisms of genetics and cellular processes.
RNA and DNA are both nucleic acids that play essential roles in genetic information and protein synthesis. However, they differ in various aspects.
DNA, or deoxyribonucleic acid, is a double-stranded molecule composed of nucleotides. It contains the sugar deoxyribose and the nitrogenous bases adenine (A), cytosine (C), guanine (G), and thymine (T). DNA carries the genetic code and serves as the hereditary material in most organisms.
On the other hand, RNA, or ribonucleic acid, is typically single-stranded and contains the sugar ribose. RNA also consists of nucleotides, but it uses uracil (U) instead of thymine as a nitrogenous base. RNA has several forms, including messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). Each form has specific roles in protein synthesis.
In terms of function, DNA stores and transmits genetic information, while RNA helps translate that information into proteins. DNA is primarily located in the nucleus of cells, while RNA is found in both the nucleus and cytoplasm.
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Draw the missing parts of the structure of the DNA molecule
Deoxyribonucleic acid or DNA is a molecule composed of two chains of polynucleotides that match with each other.
Each nucleotide is formed by a phosphate group, a sugar called deoxyribose, and a nitrogen-containing nucleobase.
With the symbols of the question, each nucleotide would be as follows
The nucleobases form pairs, adenine (A) with thymine (T) and guanine (G) with cytosine (C).
In the diagram, you have one complete chain on the left and an incomplete one on the right:
Phosphate- Sugar - Adenine - Thymine - Sugar
Phosphate- Sugar -Thymine -Adenine- Sugar
Phosphate- Sugar -Guanine
Phosphate- Sugar -Cytosine
Phosphate- Sugar -Guanine
Phosphate- Sugar -Cytosine
Phosphate- Sugar -Thymine
So you would need to draw the missing part as follows:
Phosphate- Sugar - Adenine - Thymine - Sugar -Phosphate
Phosphate- Sugar -Thymine -Adenine- Sugar -Phosphate
Phosphate- Sugar -Guanine- Cytosine - Sugar -Phosphate
Phosphate- Sugar -Cytosine-Guanine- Sugar -Phosphate
Phosphate- Sugar -Guanine- Cytosine - Sugar -Phosphate
Phosphate- Sugar -Cytosine-Guanine- Sugar -Phosphate
Phosphate- Sugar -Thymine- Adenine- Sugar -Phosphate
Each pair should look like this:
Genes _____.
are carried on chromosomes
are made of DNA
can cause genetic disorders
determine physical and chemical traits
are made of chromosomes
Answer:
Genes are carried on chromosomes
Genes are made of DNA
Genes can cause genetic disorder
Explanation:
Ribosomes provide the scaffolding on which tRNAs interact with mRNA during translation of an mRNA sequence to a chain of amino acids.
a. True
b. False
Answer:
a. True
Explanation:
Ribosomes are ribonucleoprotein complexes composed of RNA and proteins, which have two main roles 1-decode the message of the messenger RNA (mRNA) molecule and the formation of peptide bonds in the protein. For this purpose, each triplet of nucleotide bases or 'codon' in the mRNA sequence is used to assemble specific amino acids in the nascent polypeptide chain. Although different, both prokaryotic ribosomes and eukaryotic ribosomes are composed of two subunits: one small subunit that decodes the mRNA into a specific amino acid chain, and one large subunit that forms the peptide bonds in the polypeptide chain. Each ribosomal subunit is in turn composed of ribosomal RNAs and proteins. These ribosomal RNAs act as scaffolds by combining with proteins that assemble into ribosomes (i.e., small and large ribosome subunits).
5. Albinism is a failure to produce the enzyme needed to make melanin. It is recessive to normal pigmentation. An albino woman whose father is albino and mother normal, marries a normal man, one of whose parents is normal and the other albino. He has an albino sister. The couple have a normal daughter. Identify all genotypes and phenotypes. What is the probability of a heterozygous dominant parent and a recessive parent having an affected boy if a particular trait is autosomal recessive?
The genotypes that are involved are AA and aa
The probability of a hete--rozygous dominant parent and a recessive parent having an affected boy if a particular trait is autosomal recessive is 50%
What is albinism?We can infer that the daughter must have the genotype Aa given that the dominant allele (A) is required for normal pigmentation and the couple has a daughter who is normal.
Let's think about the following in relation to the second query concerning the likelihood of an affected boy having het---erozygous dominant parent (Aa) and a recessive parent (aa) if the trait is autosomal recessive:
The affected boy would need both copies of the recessive gene (aa) if the characteristic is autosomal recessive in order to display it.
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Which of the following is not expected to dilate the arterioles leading into the capillary beds? Which of the following is not expected to dilate the arterioles leading into the capillary beds? Local application of hydrochloric acid Local application of epinephrine Local application of histamine Local application of heat
Answer:
Local application of epinephrine
Explanation:
Dilation of the arterioles leading into the capillary beds means it is closely associated with the heart. Local application of substances such as hydrochloride acid and histamines give signals to some chemoreceptors which effects a response of dilating the arterioles. Heat also dilates the arterioles and makes water to be lost through the skin pores which helps in the cooling, regulation of body temperature and homeostatic functions.
Application of epinephrine however constricts the arterioles. Epinephrine is used to increase the blood pressure of humans under certain medical conditions. The epinephrine constricts the arterioles which is a blood vessel thereby increasing the blood pressure.
Dilation of arterioles causes a decrease in resistance, increasing blood flow to downstream capillaries, and a smaller decrease in blood pressure, due to epinephrine.
Local application of Epinephrine injection is used along with emergency medical treatment to treat life-threatening allergic reactions caused by insect bites or stings, foods, medications, latex, and other causes.
EpinephrineEpinephrine is in a class of medications called alpha- and beta-adrenergic agonists (sympathomimetic agents).
Epinephrine is employed to extend the vital sign of humans under certain medical conditions. The epinephrine constricts the arterioles which may be a vessel thereby increasing the vital sign .
Dilation of the arterioles leading into the capillary beds means it's closely related to the guts .
Local application of drugs like hydrochloride acid and histamines give signals to some chemoreceptors which affect the response of dilating the arterioles.
Heat also dilates the arterioles and makes water to be lost through the skin pores which helps in the cooling, regulation of body temperature, and homeostatic functions.
Therefore, the correct option is the local application of epinephrine that constricts arterioles.
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1. Two cats are mated. One of the parent cats is long-haired (recessive allele). The offspring of the two cats are: two short-haired and three long-haired kittens. What does the second parent look like (phenotype), and what is its genotype? Make a punnet square.
Answer:
2 Hh- short-haired kitten
2hh- long-haired kitten
Explanation:
Parental phenotypes: long-haired short-haired
Parental genotypes: hh × Hh(second parent)
Genotypes of F1 generation: Hh, hh, Hh, hh
2 Hh- short-haired kitten
2hh- long-haired kitten
What refers to the process by which cells become specialized in structure and function
Answer:
Hope this will help you... And please mark me as Brilliant
Explanation:
Permineralization. Permineralization is a process of fossilization that occurs when an organism is buried. The empty spaces within an organism (spaces filled with liquid or gas during life) become filled with mineral-rich groundwater. ... Small-scale permineralization can produce very detailed fossils.
Lesson 3.2 Review -- High School, Grade 9
1. How does solar energy and the greenhouse effect impact Earth's global climate system?
2. Describe the factors that result in different climates in different parts of the world.
3. Describe the different causes of climate change.
4. What are the factors that result in different climates in different parts of the world?
5. (Apply Scientific Reasoning) How might the speed of climate change affect the ability of life on Earth to adapt and survive?
6. For Biosphere to meet its goal, why was it necessary for it replicate a variety of climates?
The Solar energy and the greenhouse effect impact Earth's global climate system by increasing the temperature on the surface of the Earth. There are several factors such as green house effect and air pollution that result in different climates in different parts of the world.
What is green house effect?The greenhouse effect has been described as when gases in the earth's atmosphere has been trapped the heat from the sun that would otherwise escape into space. This concentration of the Solar energy has been trapped in the earth's lower atmosphere causes the temperature of the earth's surface to rise.
The greenhouse effect has been traps this heat energy in the earth's lower atmosphere. This could leads to increased temperatures on the surface of the earth and intense impacts on the global climate system.
Therefore, There are several factors such as green house effect and air pollution that result in different climates in different parts of the world.
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Which definition best fits the use of the word designation as it is used in the passage
Answer: a distinguishing name, sign, or title.
1 : to appoint or choose by name for a special purpose designate someone as team captain · 2 : to mark or point out : indicate · 3 : to call by name or title.
Explanation: A designation is a description, name, or title that is given to someone or something. Designation is the fact of giving that description, name, or title. Read the passage(s) below and then choose the best answer to each question. Answer the question on the basis of what is stated or implied in the passage(s). Example Sentences:
Though many people call her a liberal, it is not a designation she uses herself.
we've never given the homemade gadget a proper designation
The conformational change in an enzyme after the substrate is bound that allows the chemical reaction to proceed, can be explained by
A.induced fit
B. transition
C. fit and fine
D. Pasteur
Which statement about cellular respiration is true?
It produces oxygen.
It requires water.
It is used by every living cell.
it converts energy to food.
2.2.1 2.2.2 State TWO possible advantages of using bananas as a vaccine against diseases. Give TWO reasons why people might be against the use of genetically modified bananas.
Advantages of using bananas as a vaccine against diseases: Oral Delivery, Cost-Effective Production.
Reasons why people might be against the use of genetically modified bananas: Safety Concerns, Moral Considerations.
1. Oral Delivery: Bananas can be consumed orally, making them an ideal vehicle for delivering vaccines. This eliminates the need for injections, which can be uncomfortable and require medical professionals to administer.
2. Cost-Effective Production: Bananas are relatively inexpensive to produce and are widely available in many parts of the world.
This makes them a cost-effective option for vaccine production and distribution, particularly in resource-limited settings.
Reasons against the use of genetically modified bananas as vaccines:
1. Safety Concerns: Some individuals may have concerns about the safety of genetically modified organisms (GMOs), including genetically modified bananas.
There may be uncertainties about the long-term effects of consuming GMOs, and fears of potential risks to human health and the environment.
2. Ethical and Moral Considerations: Opposition to genetically modified bananas may stem from ethical and moral concerns regarding the alteration of natural organisms.
Some people may view genetic modification as interfering with nature or raising questions about the boundaries of manipulating living organisms.
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Some igneous rock forms from magma that cools slowly within Earth’s crust. Briefly describe the most likely crystallization and texture of the rock. Other igneous rock forms from lava that cools quickly on Earth’s surface. Classify the rock as either intrusive or extrusive, and identify another word used to describe this type of rock. You are studying a sample of igneous rock. The rock formed on the surface of Earth. It’s made mostly of light-colored minerals. The sample has just a few specks of dark-colored minerals. Classify the rock by type and composition. You are studying a sample of igneous rock. The rock formed within Earth’s crust. The sample contains a very high concentration of dark-colored, high-density minerals. Classify the rock by type and composition. A scientist shows you a sample of rock called gabbro. The scientist explains that gabbro is an intrusive mafic igneous rock. Explain what this means.
1
What are the four types of living things found in an ecosystem?
producers, consumers, second consumers, tertiary consumers
producers, scavengers, consumers, decomposers
producers, scavengerrs, primary consumers, tertiary consumers
producers, primary, secondary, tertiary
Answer:
C. producers, scavengers, primary consumers, tertiary consumers
Explanation:
Someone said B was wrong so this would be my second answer.
for body sharp the domain trait is
Those with one copy of the dominant allele, which might come from only one parent, will have a dominant phenotype.
What is the difference between a dominant and recessive phenotype?In people who only have one copy of allele, which could also come from one parent, a dominant allele results in a dominant phenotype. A recessive allele requires two copies—one from each parent—in order to result in a recessive phenotype in the individual.
Is the phenotype of AA dominant?A capital letter is used to identify a dominant allele (A versus a). The combinations are AA, Aa, and aa because each parent contributes one allele. The dominant trait will be phenotypically displayed in offspring with either an AA or an Aa genotype, while the recessive trait will be expressed in aa individuals.
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Why do engineers and geologists try to find disposal sites that are unlikely to be damaged by movements of the earth
Answer:
The only way to make the radioactive wastes nonhazardous is to let them sit for thousands of years until the radioactivity decreases to safe levels. Therefore, engineers and geologists search for disposal sites that probably will not be damaged by movements of the Earth for thousands of years.
hope it helps
Answer:
The only way to make the radioactive wastes nonhazardous is to let them sit for thousands of years until the radioactivity decreases to safe levels. Therefore, engineers and geologists search for disposal sites that probably will not be damaged by movements of the Earth for thousands of years.
Brown eyes are dominant over blue eyes for a particular litter of puppies. What could account for a litter of puppies that had more blue eyes than brown eyes? Brown eyes are dominant over blue eyes for a particular litter of puppies. What could account for a litter of puppies that had more blue eyes than brown eyes?
Each parent provided both dominant and recessive genes in equal numbers.
⊝
Genes from both parents were dominant.
⊝
Genes from both parents were recessive.
⊝
One parent provided dominant genes and one parent provided recessive genes.
Answer:
Genes from both parents were recessive
Explanation:
Deposited sediment may be in particles of which type of rock
Deposited sediment may be in particles of sedimentary rock.
Pre-existing rocks or fragments of extinct species serve as the building blocks for sedimentary rocks. They develop from deposits that build up on the surface of the Earth. Sedimentary rocks frequently exhibit recognizable bedding or layering. Mesas and arches built of stratified sedimentary rock can be seen in many of the desert southwest's attractive landscapes.
You can divide sedimentary rocks into two groups. The first type is called detrital rock and is created when sediment, rock fragments, or other elements are eroded and accumulated; these materials are collectively known as detritus or waste. The other type of rock is chemical rock, which is created when minerals dissolve and then precipitate.
It's possible for detritus to be organic or inorganic. When plant and animal components decompose below, the biological material is left behind that is crushed and transformed into organic detrital rocks. The sedimentary rock known as coal was created by compacted plants over millions of years. On the other hand, inorganic detrital rocks are not generated by living creatures but rather by the fragmentation of other rocks. Clastic sedimentary rocks are another name for these rocks. One of the most well-known clastic rocks is sandstone.
Limestone and shale are some of the other examples of common sedimentary rocks. These rocks frequently begin as sediments that are transported by rivers, and then are dumped in lakes and oceans. The sediments become dry and cement together to form rock when they are buried. Volcanic ash can be found in tuffaceous sandstones.
Chemical sedimentary rocks can be found in a variety of environments, including caverns, deserts, and the ocean. For instance, calcium carbonate precipitation and the remains of shelled marine organisms are two of the key ingredients in the formation of limestone at the ocean's bottom. If limestone is discovered on land, it is likely that the region was once submerged.
Although cave formations are likewise made of sedimentary rocks, their formation is substantially different. When water travels through bedrock and picks up calcium and carbonate ions, stalactites and stalagmites are formed. When the chemical-rich water enters a cave, it evaporates and deposits calcium carbonate on the cave's ceiling or floor, where it forms stalactites and stalagmites.
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37. Which of Mendel’s laws states that two alleles for each trait separate duringmeiosis?A. law of independent assortmentB. law of segregationC. law of hybrids
The correct option is B. Law of segregation.
An axon can alter the speed or magnitude of its action potentials
Select one
True
False
Answer:
TRUE
Size. Action potentials travel down neuronal axons in an ion cascade. ... This continues down the axon and creates the action potential. Larger diameter axons have a higher conduction velocity, which means they are able to send signals faster.
The statement that an axon can alter the speed or magnitude of its action potential is True
What is an axon?An axon is a long, slender projection of a nerve cell, or neuron, in vertebrates, that conducts electrical impulses known as action potentials away from the nerve cell.
Axon diameter, myelin sheath thickness and internode distance can all influence the speed of action potential propagation.
Therefore, an axon can alter the speed or magnitude of its action potential.
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Which research method involves an in-depth investigation of an individual subject?
A naturalistic observation
O A case study
OA survey
An experiment
explain why the use of blood type for peternity testing is not conclusive
Answer:
Although blood group studies cannot be used to prove paternity, they can provide unequivocal evidence that a male is not the father of a particular child. Since the red cell antigens are inherited as dominant traits, a child cannot have a blood group antigen that is not present in one or both parents.
hope it helps
Explanation:
Although blood group studies cannot be used to prove paternity, they can provide unequivocal evidence that a male is not the father of a particular child. Since the red cell antigens are inherited as dominant traits, a child cannot have a blood group antigen that is not present in one or both parents.
Which letter would represent the Sun on the
HR-Diagram below?
A
D
B
A
Brightness
C
B
Temperature
E
D and E
с
The Science Duo
x
QUE
*
Answer: A
Explanation:
It has the highest temperature + brightness
1. Photosynthetic reactions that do not require light and occurs in the stroma are known as
Answer:
The Calvin Cycle
Explanation:
Is it a,b,c or d? explain...
Answer:
A.30
Explanation:
According to Chargaff's rule there is the same number of Thymine bases as there are of adenine
so we have 120 adenine and 120 thymine
300-120-120=60
those 60 base pairs are represented by cytosine and guanine which also pair with each other according to chargaff's rule they're equal in number
60/2=30 guanine bases