1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Zepler [3.9K]
3 years ago
8

A sample of DNA is collected from an organism. It is analyzed and determined that 20% of the DNA is made up of the base adenine.

Using this information, determine the amount of the three remaining bases for this sample.
Biology
1 answer:
AnnyKZ [126]3 years ago
7 0

Answer:

The correct answer is -

Thymine: 20%

Guanine: 30%

Cytosine: 30%

Explanation:

According to Chargaff's rule which states that the purine residues are equal to the pyrimidines residue in DNA sample which means A+G = T+C where A is adenine, G is guanine, C is cytosine and T is thymine. It is also known that A is always equal to T and C is equal to G.

So, A+G+T+C = 100

20+20+G+C

100-40 = G+C

60= G+C

as we know G is equal to C similarly A is equal to T

Thus, G = C= 30%

    A= T= 20%

You might be interested in
19. How many bones do sharks have in their bodies?
aivan3 [116]
None; sharks don't have bones, instead, they have strong cartilage, much like what our noses are made up of
5 0
3 years ago
What type of fossil preserves delicate details of an organism after pressure squeezes out liquids and gases?
pickupchik [31]

Carbon film fossil is the type of fossil that preserves delicate details of an organism after pressure squeezes out liquids and gases.

Carbon film fossil is a type of fossil that is mainly composed of carbon and can preserve delicate details of organism’s (animal and plants) parts. The formation of carbon film fossil starts when a dead organism is buried under sediments. After some time, the organism will begin to decay in a process known as carbonization. Pressure will squeeze out liquids and gases from the dead organism, leaving behind a layer of carbon. Carbon film fossils usually appear black or brown in colour.

4 0
3 years ago
Read 2 more answers
When does fetal erythrocyte production shift from the liver to the bone marrow?
vichka [17]

Answer: After seven months.

Explanation:

The blood carries various substances that must be transported from one part of the body to another. Red blood cells are an important component of the blood because their function is to carry oxygen to the body tissues and exchange it for carbon dioxide, which is carried and removed by the lungs.

Erythropoiesis is the process of red blood cell (erythrocyte) production. It is stimulated by a decrease in O2 in the circulation, detected by the kidneys, which then secretes the hormone erythropoietin. This hormone stimulates the proliferation and differentiation of red blood cell precursors, which triggers an increase in erythropoiesis in hematopoietic tissues and ultimately in the production of red blood cells. <u>In adults, red blood cells are formed in the red bone marrow.</u>

In early developing fetuses, erythropoiesis occurs in the mesodermal cells of the yolk sac. In the third or fourth month, erythropoiesis moves to the liver. After seven months, erythropoiesis occurs in the bone marrow.

6 0
3 years ago
A researcher while working in vitro (outside cell) added helicase enzyme which resulted in the untwisting of the DNA helix. But
Nadusha1986 [10]
The answer is <span>Topoisomerase.

Topoisomerase is an enzyme responsible for twisting of DNA helix. After DNA strand is untwisted by helicase enzyme, DNA must be twisted again so the normal function of DNA can be sustained. If left untwisted, the replication fork will continue to grow, the normal function of DNA will stop.</span>
7 0
3 years ago
During the process of succession,
VMariaS [17]

Answer:

hmmm....

Explanation:

idk i think b.

4 0
3 years ago
Other questions:
  • How to clean out the prostate with enzymes and acids?
    11·1 answer
  • What biomolecule determines whether an individual inherits the inability to produce the enzyme needed to break down the amino ac
    15·1 answer
  • Viewed through a microscope, a sample of natural water is seen to contain sphere-shaped and rod-shaped bacteria. Which of the fo
    8·1 answer
  • Which phenomenon occurs when the Sun crosses the plane of Earth’s equator?
    10·2 answers
  • Which statement about common names does this fact best exemplify
    10·1 answer
  • What are the structures that support and give shape to plant cells?
    11·2 answers
  • Use the following diagram to answer questions 13. The gas released in this investigation is...
    11·1 answer
  • An earthquake with a(n) of 7.2 releases about 30 times as much energy as an earthquake that registers 6.2 on the Richter scale.
    10·1 answer
  • An organism’s scientific name consists of which TWO taxonomic groups? (Select the TWO correct answers).
    14·1 answer
  • Which of the following is the disadvantage of sexual reproduction?
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!