The following questions are based on the 15 molecules illustrated in Figure 5.8. Each molecule may be used once, more than once, or not at all.

-Enzymes that break down DNA catalyze the hydrolysis of the covalent bonds that join nucleotides together. What would happen to DNA molecules treated with these enzymes?
A)The two strands of the double helix would separate.
B)The phosphodiester linkages between deoxyribose sugars would be broken.
C)The purines would be separated from the deoxyribose sugars.
D)The pyrimidines would be separated from the deoxyribose sugars.
E)All bases would be separated from the deoxyribose sugars.

Question

The following questions are based on the 15 molecules illustrated in Figure 5.8. Each molecule may be used once, more than once, or not at all.

-Enzymes that break down DNA catalyze the hydrolysis of the covalent bonds that join nucleotides together. What would happen to DNA molecules treated with these enzymes?
A)The two strands of the double helix would separate. 
B)The phosphodiester linkages between deoxyribose sugars would be broken. 
C)The purines would be separated from the deoxyribose sugars. 
D)The pyrimidines would be separated from the deoxyribose sugars. 
E)All bases would be separated from the deoxyribose sugars.

Quizplus · Accepted Answer

Enzymes that break down DNA catalyze the hydrolysis of the phosphodiester linkages between the deoxyribose sugars. This results in the separation of the nucleotides and ultimately, the complete breakdown of the DNA molecule. The strands of the double helix would separate as a result of this. Therefore, option B is the correct answer. Option A is not correct because the separation of the strands would be a result of the breaking of the phosphodiester bonds. Options C, D, and E are incorrect because they do not accurately describe the process of DNA breakdown by enzymes.

The Following Questions Are Based on the 15 Molecules Illustrated