biology unit 5 test

Question

The biomolecule structure shown is formed by the hydrogen bonding between nitrogenous bases Adenine with Thymine and between nitrogenous bases Guanine and Cytosine. Which of the following is true for the structure shown above

A It is DNA which is made up of nucleotides

B It is a nucleotide which is made up of DNA

C It is an amino acid which is the subunit of DNA

D It is DNA which is made up of enzymes



Answer 1

Ok, so let’s look at the answer choices

A It is DNA which is made up of nucleotides

1. Hmmm this one is true! DNA is made of nucleotides, which are the “links” that make up DNA and each one includes a sugar and a phosphate as well as an amino acid like adenine, guanine, cytosine, and thymine.

B It is a nucleotide which is made up of DNA

1. this can’t be true... because nucleotides make up DNA, not the other way.

C It is an amino acid which is the subunit of DNA

1. this is kind of true, but not totally. Amino acids are part of the DNA structure, but you have to have your sugar-phosphate backbone, too. Amino acids are individual molecules that form base pairs when linked together, and the question is referring to a structure with linked amino acids (base pairs) so there is no way the structure above is just an amino acid.

D It is DNA which is made up of enzymes

1. this is straight up not true