DNA Structure and Replication
The higher order structure of DNA shows symmetry, whereas the higher order structures of most proteins do not. Why isn't protein shape more regular like DNA?

DNA has one main function in cells whereas proteins have many.
All of these
The many different amino acid R groups on proteins confer many different shapes.
Some S amino acids cause proteins to bend; others cause protein to flatten.

ANSWER DOWNLOAD EXAMIANS APP

DNA Structure and Replication
Taylor, Woods and Hughes labeled Vicia DNA by allowing new DNA synthesis in the presence of radioactive thymine. After DNA replication (S phase of the cell cycle), it was observed that

both chromatids of a chromosome were labeled
neither chromatid was labeled
only one chromatid of a chromosome was labeled
both (a) and (b)

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON DNA Structure and Replication