If a double-stranded segment of DNA has been found to have 23 purines and 15 thymines, how many guanines are there?

Answers

Answer 1

Answer: 4 Guanines

Explanation: Following Chargaff's ratio that describes the ration of purines to pyrimidines as 1:1, if there are 23 purines, it follows that there should be 23 pyrimidines; 15 Thymines should therefore be hydrogen bonded to 15 Adenines by complementary base pairing.

We are then left with 8 nucleotides composed of guanines and cytosines in complementary base pairs. This means that half that number (4) should be guanines and the rest cytosines.

Answer 2

The DNA is a double-stranded molecule, which is made up of purine, pyrimidine, a pentose sugar, and phosphate backbone. Chargaff's rule states that any species will have a stoichiometric ratio of 1:1.

The number of guanines in the double-stranded DNA is 4.

In the DNA, the base pairing occurs as:

The guanines bind with cytosine through hydrogen bonding. The adenine binds with thymine with two hydrogen bonds.

In the given nucleotide, there are 23 purines (guanine and adenine). There are 15 thymines in the DNA molecule.

Based on the Chargaff rule, the 15 thymines will bind to adenine, leaving only 4 guanines and 4 cytosines. Thus, there will be 4 cytosines left to bond with the guanines to achieve Chargaff's ratio of 1:1.

Therefore, the guanine in the nucleotides will be 4.

To know more about Chargaff's rule, refer to the following link:

https://brainly.com/question/19156457


Related Questions

According to the bar graph, how many players averaged more than 30 points
per game?

Answers

Answer:

2 players

Explanation:

Answer:

2

Explanation:

= Arenas and Bryant

.........

Please help me ?!!!!

Answers

Answer:

the last one I am guessing

Explanation:

If right can you give me brainiest

Hope you have a wonderful day:)

respiration in echinoderms​

Answers

In general, echinoderms typically respire by simple diffusion, using gills or specialized projections, like tube feet or pockets, to circulate water and oxygen through their bodies. Many echinoderms also use a simple hemal system, a series of pockets and tubes that serves almost like a net of veins and arteries.

What structure provide shape and support for the cell?
A.Chloroplast
B.Mitochondria
C. cell Wall
D.Golgi bodies

Answers

the answer is cell wall :)

The cell wall provides shape and support for the cell. Therefore, option (C) is correct.

What is cell wall?

In the cells of plants, fungi, and some bacteria, the cell wall is a strong structure that encloses the cell membrane. It has a solid and strong structure because it is formed of chitin, which is found in fungi and cellulose in plants. The cell wall supports it mechanically, shields it from harm, and aids in keeping its shape. Moreover, it stops the cell from bursting or collapsing under pressure, which is crucial for plant cells because they must maintain turgor pressure in order to function properly.

Animal cells, on the other hand, lack a cell wall and instead contain a cytoskeleton formed of protein fibers that gives them stability and shape. Organelles that perform photosynthesis include chloroplasts, mitochondria, and golgi bodies, which also produce energy and process and transport proteins inside of cells.

Learn more about cell wall, here:

https://brainly.com/question/965751

#SPJ6


Would the movement of oxygen through the cells?

Answers

Answer - The oxygen molecules move, by diffusion, out of the capillaries and into the body cells. While oxygen moves from the capillaries and into body cells, carbon dioxide moves from the cells into the capillaries. Carbon dioxide is brought, through the blood, back to the heart and then to the lungs.

Scientists have names for more than 30 types of snow crystals.

Answers

Answer:

it's false there are only five types of snow crystals

False I looked it up on goggle and it said that only 7 snow crystals are known

What is a coral reef made of?
A. Grass
B. Dead animals
C. Volcanic rocks
D. Sand

Answers

The answer is B. Dead animals

Answer: B. Dead animals

Explanation:

Coral reefs are made with calcium. How do they get this calcium? From the skeletons of various organisms in the ocean.

if some can help me with my biology final the whole 25

Answers

Answer:

add the answers if you dont know

Explanation:

Answer:

KC is looking at cells in biology class, but he doesn't know where they came from. He sees that the cells under his microscope have cell walls and chloroplasts. Therefore, KC is likely observing cell from:

A leaf that got blown onto the floor.

Plant cells are the only cells w/ chloroplast!

Explanation:

pick me as the brainliest

Chemicals used in chemotherapy treatments to fight cancer can also harm cells in hair follicles and bone marrow.
What characteristic do these cels most likely share with cancerous cells?
O They form tumors.
O They spread through the blood.
• They divide rapidly.
O They contain a mutation.
A

Answers

Answer:

They divide rapidly

Explanation:

Some normal cells such as hair follicles cells, mouth cells, digestive tract cells, and bone marrow cells divide rapidly. In mammalians, hair follicle cells are cells localized in the skin, specifically in the dermal layer of the skin. In this region, epidermal cells that form the root of the hair divide rapidly by interacting with neuropeptides, hormones, and immune cells. On the other hand, the bone marrow is a spongy tissue found in bones that contain stem cells (which also divide rapidly). In consequence, it is well-known that high-dose chemotherapy treatments may damage these types of cells.

What TWO things cause denaturation of enzymes:

Answers

introducing heat or chemicals which will alter its pH .

Which of the following are solutions to slow down groundwater depletion?

a -Landscape with native plants

b- promote the use of water resources

c- encourage population growth

d- develop crops that require more water

Answers

It could be d- or b-

A pathogen that feeds off and causes harm to other organisms is called what?

Answers

There are 5 main types of pathogens that can harm other organisms and cause diseases. They are viruses, bacteria, fungi, Protozoa, and worms.
Its called parasites. Parasites are living organisms that feeds off on other organism that causes harm

Explain how matter is cycled between plants and animals.

Answers

The food of almost any kind of animal can be traced back to plants. ... Matter cycles between the air and soil and among plants, animals, and microbes as these organisms live and die. Organisms obtain gases and water from the environment and release waste matter (gas, liquid, or solid) back into the environment. Hope this helps :)

The food of come from autotrophic plant to animal through food chain. The energy cycles between the air and soil and plants, animals, and microbes occur by food web.

What are the components of food web?

A food web is defined as the cyclical event of energy transfer among different trophic level of organism.

The major components are primary producers, primary consumers, secondary consumers, tertiary consumers, quaternary consumers

Primary producers are the green autotrophic plants and capture some of the solar energy  and convert it into chemical energy by photosynthesis.

The net primary productivity (NPP) of energy is defined as the rate of photosynthesis minus the rate of respiration of plants.

Primary consumers or herbivores feed on producers constitute  the second trophic level of the food web.

in third tropic level, Secondary consumers eat primary consumers where as  tertiary consumers, quaternary consumers or predators, carnivores or omnivores, which are both plant- and animal-eaters, such as humans.

For more details regarding food web , visit:

https://brainly.com/question/2233704

#SPJ2

what molecules from proteins when linked together with covalent bonds

Answers

Answer:

Amino Acids

Explanation:

they link with each other through means of peptide bonds and as a result form proteins

Cyanide poisons cell by limiting the production of ATP through cellular respiration. Cyanide does this by blocking the enzyme that attaches electrons and hydrogen atoms to oxygen to form water.

Which stage of cellular respiration would this most directly affect?

A Acetyl CoA formation
B Electron transport chain
C Glycolysis
D Krebs cycle

Answers

C SHOULD BE THE CORRECT ANSWER BUT IM NOT SURR

Drag each tile to the correct box.
Sort the types of energy according to the order in which they move through this system:
Water stored in dams falls freely with the force to make a turbine move. The turbine moves and produces electricity. This electric energy is
supplied to homes. At home, we use electricity for heating, cooling, and lighting.
Put these in order:

Electrical energy

Light energy

Potential energy

Kinetic energy

Answers

Answer:

Electrical energy > kinetic energy > light energy > potential energy

Explanation:

This stage of cellular respiration requires the presence of oxygen.
A. anaerobic respiration
B. glycolysis
C. fermentation
D. aerobic respiration

Answers

Answer:

Aerobic Respiration

Explanation:

Aerobic (in the presence of oxygen)

Anaerobic (absence of oxygen)

Glycolysis (central pathway for glucose{sugar} metabolism)

Fermentation (chemical breakdown of a substance by bacteria, yeast or other microorganisms and the escape of gases and heat)

T the answer would have to be A

After being hunted to near extinction, wolves were reintroduced to Yellowstone National
Park in 1995. After two years, the population of wolves increased rapidly until 2009.
After 2009, the population decreased slightly and has remained at an average of 93
wolves. Which type of growth curve describes the Yellowstone wolves?
A. population density curve
B. exponential growth curve
C. bell curve
D. logistic growth curve

Answers

Answer: B: exponential growth curve

Explanation: An exponential growth curve is J-shaped. Exponential growth is more common in R-selected species, which have a short life span and a high rate of reproduction. Yellowstone National Park has 124 wolves living in it.

How old do paleontologist believe the earth is?

Answers

Answer:

Scientists now know the Earth is actually 4.54 billion years old, an age built on many lines of evidence from the geologic record.

Explanation:

Scientists now know the earth

Which wavelength of light are more stretched—red light or blue light?

Answers

red light is more stretched

Answer:

Red

Explanation:

Blue light has a shorter wavelength than red.

PLEASE HELP MEEE. _______ and _____
are what we call the molecules
before and after a chemical reaction.

Answers

The terms we call the molecules before and after a chemical reaction are - reactants and products respectively.

Molecules before and after a chemical reaction

Chemical reactions are takes place when chemical bonds form between molecules and atoms of substances. There are two-part to any chemical equation: part before the chemical reaction and after the chemical reaction.

In the part before the chemical reaction starts, there are molecules of the substance is called reactants that react with one another in chemical reaction and form or break chemical bonds of molecules. Products are newly formed substances by forming bonds in a chemical reaction.

Find more information about the chemical reaction:

https://brainly.com/question/26018275

Reactants and products are the names that we call the molecules before and after a chemical reaction respectively.

What is a Chemical reaction?

A chemical reaction may be defined as a mechanism that significantly directs the chemical transformation of one set of chemical substances or molecules to another. This process of chemical transformation utilizes numerous catalysts to enhance the rate of reaction.

The amount or number of chemical substances or molecules that are present before the progression of reaction are known as reactants.

While after the successful progression or completion of a specific chemical reaction such reactants are performed into another, these substances or molecules are known as products.

Both the molecules of reactants and products possess some sorts of chemical identity in order to distinguisg from each other.

Therefore, Reactants and products are the names that we call the molecules before and after a chemical reaction respectively.

To learn more about Chemical reactions, refer to the link:

https://brainly.com/question/11231920

3SPJ2

HELPPPPPP ASAPPPPPPPP HELPPPP

Answers

Little to no agitation I’m pretty sure

Answer:

it is C. Little to No agintation

1. The parts of the flower involved in reproduction are ________ and __________
2. The anthers bear the ___________the microspore mother cells give rise to _______or pollen grains after meiotic cell division.

Answers

Answer:

1. Stamen and pistil

2. Pollen, microspore

Explanation:

The flower is the reproductive part of certain plants called ANGIOSPERMS. They make use of their flower for sexual reproduction. The different parts of the flower work together to achieve a common goal, which is to reproduce, however, they do it in various ways. For example, accessory parts like petals attract pollinators. The major parts of the flower that are directly involved in the reproductive act are STAMEN (male) and PISTIL (female).

The stamen which constitutes a structure called ANTHER bears the pollen grains or microspore, which is made when the microspore mother cells undergo meiotic division. Hence, the pollens are released from the anther of a male flower (stamen), into the stigma of the female flower (pistil).

(FW.02]The diagram below shows a portion of the water cyle.
Y
Spring
Aquifer
What does Y most likely represent?
O precipitation
Orecharge
Oatmosphere
Ogroundwater

Answers

Answer:

I would have to say recharge of the aquifer by using ground water after some precipitation.

Explanation:

Melting snow or rain increases ground water that percolates down to replenish the aquifer.

Elevation changes causes the aquifer to flow up in low spots/springs on the surface.  And the cycle repeats through evaporation and plant respiration.

Did the medical assistant have the syringe properly positioned

Answers

Answer:

the medical assistant could have positioned the syringe wrongly, as it could have been the one causing pain and irritation, and it was vital to confirmed..........

1) State three economic importance of Amoebiasis,​

Answers

Answer:

An amoeba's economic value can be found in medicine and nutrient recycling. According to Biology Reference, certain amoeba species can cause sickness and death, while others are important in maintaining healthy ecosystems because they recycle the nutrients needed by bacteria and keep the bacterium population under control.

OAmalOHopeO

AUG is generally a start codon. what is the amino acid that AUG codes for ?

Answers

AUG codes for methionine.

When bonds are broken between atoms in molecules, energy is
a. stored as ADP
b. released
c. created
d. conserved

Answers

ANSWER: b. released

Explanation:

PART II
Direction: Write the symbols of some elements and the group number it belong to
Name
Symbol
Group Number
Iron
Silver
Mercury
Oxygen
Gold
Potassium
Xenon
Magnesium
Hydrogen

#pa help po

Answers

Answer:

Iron -> Fe - Group 8

Silver -> Ag - Group 11

Mercury -> Hg - Group 12

Oxygen -> O - Group 16

Gold -> Au - Group 11

Potassium -> K - Group 1

Xenon -> Xe - Group 18

Magnesium -> Mg - Group 2

Hydrogen -> H - Group 1

4. How did the pH of the water affect the hatching of the brine shrimp?
I

Answers

Pure water is supposed to have a pH very close to 7,solutions with a ph of less than 7 are acidic and solutions with a ph greater than 7 are basic ,ph can have an effect on the growth of growing organisms such as brine shrimp,eggs can last years on dry land but when added to water they hatch within 12hrs.
Hope this helps!
Other Questions
what two numbers add up to be 116.5 Rick is taking a 1-mile ride on his bicycle. For each rotation of his tire, he travels 72 inches. How many rotations will his tire make during the 1-mile trip?O 73 rotationsO 83 rotationsO 780 rotationsO 880 rotationsSHOW YOUR WORK!!! how do u say "The first class ends at 9:45 in the morning" Sonya pushes his friend down the road on his new wagon. Which two terms accurately describe the net force acting on the sled?Group of answer choicesbalanced and contactunbalanced and noncontactbalanced and noncontact forceunbalanced and contact What are the zeros of this function? HELP Five less than twice the value of a number is equal to three times the quantity of four more than one-half the number. What is the number? Describe how the Earth's magnetic poles move. What do we mean when we say that the k-coloring algorithm discussed in the lectures is "almost" constant-time? In order to pay for the costs of medical treatment, you may need to get some form of _______________? plz help me this is a final!!!! What happens when you put Justin Bieber and lady Gaga together you get JUSTIN GAGA 1 ptsQuestion 307.3 Muscle cells require a great amount of energy. Which would you expect to findin large numbers in muscle cells?O vacuoleso mitochondriaO centriolesO endoplasmic reticulumo ribosomes< PreviousNextQuiz saved at 10:20 amSubmit u When Lady Capulet first tells Juliet of her possible marriage, how does she react? (11y + 19) 8x 96 would C be correct for this question? Help me ASAP please!!!!!!! the shapes below are mathematically simillar 16 What change, if any, needs to be made in sentence 14?A. Change elementery to elementaryB. Change which to itC. Change than to thenD. Make no change Kevin has five less than twice the number of baseball caps Steph has. If Kevin has 13 baseball caps, how many baseball caps does Steph have? A can of soda contains many ingredients, including vanilla, caffeine, sugar, and water. Which ingredient is the solvent? caffeine sugar vanilla water