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anygoal [31]
3 years ago
14

A key discovery leading to the structure of dna was done by chargaff. He found that ____. Select all that apply.

Biology
1 answer:
tresset_1 [31]3 years ago
5 0

Answer;

A. The amount of A equals the amount of T, and the amount of G equals the amount of C

C. The tetra nucleotide hypothesis is false

Explanation;

Chargaff's rule states that DNA from any cell of any organism has a 1:1 ratio of pyrimidine and purine bases and, more specifically, that the amount of guanine, a purine base, is equal to cytosine, a pyrimidine base; and the amount of adenine, a purine base, is equal to thymine, a pyrimidine base.

Chargaff's rules are important because they point to a kind of “grammar of biology”, a set of hidden rules that govern the structure of DNA.

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What part of dna stores the genetic code
EastWind [94]
Nitrogen bases; adenine, thymine, guanine and cytosine.
8 0
4 years ago
Which of the following is an example of secondary succession? A. breaking down of bare rock by fungi and mosses B. pioneer plant
Tom [10]

Answer:

C. growth of plants after a forest is destroyed by fire

Explanation:

When the ecological succession occurs on the land or region which was never inhabited by plants previously, the process is called primary succession. On the other hand, secondary succession occurs on land where the existing vegetation was destroyed by some disturbances. Secondary succession is a fast process compared to the primary succession as the soil is already present to support the growth of plants.

Among the given examples, the growth of plants after the vegetation of forest was destroyed by fire represents the process of secondary succession. Growth of vegetation on bare rocks, in the cracks in the concrete surface, or after the melting of glaciers represents the process of primary succession.

4 0
3 years ago
You are so Brainly right now.
Mrac [35]

Answer:

Sorry, not funny.

7 0
3 years ago
During glycolysis, when glucose is catabolized to pyruvate, most of the energy of glucose is a. retained in the pyruvate. b. tra
Leona [35]

Answer:

a. retained in the pyruvate

Explanation:

Glycolysis is a cytoplasmic pathway that converts glucose into two pyruvate, releasing a modest amount of energy captured in two substrate-level phosphorylations and one oxidation reaction.

Following are the important enzymes in it :

  1. Hexokinase
  2. Phosphofructokinase
  3. Pyruvate kinase

Aerobic glycolysis yields 2ATP/glucose plus 2NADH/glucose but most of the energy is retained in pyruvate which is then converted into Acetyl-CoA and enters the kreb's cycle.

6 0
3 years ago
Animals and most microorganisms are classified as chemoorganoheterotrophs. The prefixes "chemo," "organo," and "hetero" refer to
7nadin3 [17]

Answer: Option A.

Electrons,carbon and energy.

Explanation:

Chemorganoheterotrophs are organisms that uses organic substrates to produce carbon needed for their growth and development. They derive their energy from oxidation and reduction of organic substances. The use the reduced carbon produced by autrotophs as as source of electrons, carbon and energy. Example is fungi that uses carbon as electron donor and source for carbon and energy.

8 0
3 years ago
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