6. Before direct proof of DNA being the genetic material, several lines of indirect evidence had suggested DNA as the appropriate macromolecule. Which ONE of the following statements supports the hypothesis that DNA is the genetic material?

a. RNA is more stable than DNA or protein.

b. Molecular composition of DNA is variable in different cells of an organism, whereas the molecular composition of RNA and protein does not change in different cells of an organism.

c. DNA consists of only four bases while proteins are comprised of twenty different amino acids.

d. protein content is most abundant in cells just prior to division.

e. Gametes have 1/2 the amount of DNA as somatic cells.

e. Gametes have 1/2 the amount of DNA as somatic cells.

Explanation:

a. RNA is more stable than DNA or protein

-the reverese is the case, DNA has double helix structure as a result of phosphodiester bonds in the sugar-phosphate backbone plus 2 or 3 Hydrogen bonds between the nitrogenous bases.

DNA is more stable

b. Molecular composition of DNA is variable in different cells of an organism, whereas the molecular composition of RNA and protein does not change in different cells of an organism.

with the exception of gametes which contain half the amount of DNA necessary, each Cells have equal amount of DNA when compared to variable amount in cells RNA and proteins due to the different degree of expression and cell differentiation

c. DNA consists of only four bases while proteins are comprised of twenty different aminoacids.

This evidence lacks basis of why DNA is the genetic material.

d. Protein content is most abundant in cells just prior to division.

This evidence lacks basis of why DNA stands as the genetic material in individual organisms

e. Gametes have 1/2 the amount of DNA as somatic cells.

-this Argument is firmly supported since half of parent DNA is donated to its offspring forming the total genome of a somatic cell