3.which statement best describes these cells?

In an analysis of the nucleotide composition of DNA, which of the following proportions will be found?

katrin [286]

Answer:

With respect to the composition of DNA, in an analysis it can be found that the proportions of nucleotides are A + C = G + T (option a).

Explanation:

The proportion of nucleotides in a DNA molecule can be established according to the sequence of these nucleotides on both complementary strands, since the purinic bases of one strand are complemented by the pyrimidinic bases of another:

Adenine is complemented with Thymine A=T

Guanine is complemented with Cytosine G=C

From this we can deduce that in a DNA molecule with two chains there will be the same amount of adenine and thymine, as well as the same number of guanine with respect to cytosine, so:

A + C = G + T

An example of this would be a known DNA molecule (hypothetical), with 5 molecules of Adenine and 7 molecules of Guanine. In this case there are 5 Thymines, complementary with Adenine, and 7 Cytosines like Guanine:

A + C = G + T

5 + 7 = 7 + 5

6 0

3 years ago

What are the Five characteristics of life

ruslelena [56]

Answer:

reproduction growth and development regulation, homeostasis, and energy processing

Explanation:

4 0

3 years ago

Which statement is TRUE regarding the glycolytic pathway?

Westkost [7]

Answer:

d) All of the statements are true.

Explanation:

 It includes reactions catalyzed by three isomerase enzymes.

The statement is true because:

The first reaction which involve isomerase is the conversion of glucose 6-phosphate into fructose 6-phosphate with the help of an enzyme phosphoglucose isomerase.

The second reaction is conversion of dihydroxyacetone phosphate (DHAP) into glyceraldehyde 3-phosphate with the help of an enzyme triphosphate isomerase.

The 3rd reaction is conversion of 3-phosphoglycerate to 2-phosphoglycerate.

It includes five phosphate transfer reactions.

The statement is true because:

1. The conversion of glucoe to glucose 6-phosphate.

2. The conversion of fructose 6-phosphate to fructose 1,6-biphosphate.

3.The conversion of glyceraldehyde 3-phosphate to 1,3-biphosphoglycerate.

4. The conversion of 1,3-biphosphoglycerate to 3-phosphoglycerate.

5. The conversion of phosphoenol pyruvate to pyruvate.

It includes three enzymes that are regulated by product inhibition.

The statement is true because:

1. Hexokinase which is inhibited by its product glucose 6-phosphate.

2. Phosphofructokinase which is inhibited by ATP.

3. Pyruvate kinase which is also inhibited by ATP.

Thus, all the statements are correct.

6 0

3 years ago

HEY PLEASE HELP ' LOL ALMOST DONE

Nata [24]

This a tough one, and technically they all have to do with an authoritative body enforcing an environmental policy. But the most specific ones of them all would be the first sentence and the last two sentences.

4 0

3 years ago

Another characteristic that you want to include in the introduction is bacterial reproduction. Prokaryotic cells have only one c

Solnce55 [7]

Answer:

The correct options are C and D.

C. Each daughter cell is an exact copy of the other, both genetically and morphologically .

D. Due to the stretching of the cytoplasmic membrane, both cells will contain a complete genome

Explanation:

Binary fission can be described as a method of asexual reproduction in which a parent cell replicates and splits into two new daughter cells. As a result of binary fission, the daughter cells formed are exactly similar to the parent cell. It is one of the most common methods by which a bacterial cell divides.

Other options like the option B are false because the daughter cells will not be permanently smaller than the parent cell. They will grow in size.

4 0

3 years ago