Question

2. The most reasonable explanation for single strand binding proteins being part of replication but not transcription is that

A)single strand binding proteins are not made during interphase

B)deoxyribonucleotides are involved in one case; ribonucleotides in the other

C)replication and transcription occur in different parts of the cell

D)during DNA replication, the complementary strands form a larger loop that stays open longer than during transcription

Answer 1

D is the answer.

During DNA replication, the complementary strand strand forms a larger loop and they will stay apart and form a replication fork. That's why single stranded binding protein binds to each single stranded DNA and maintain the distance between two strands so that DNA replication can occur. But in case of transcription there is formed a replication bubble in which two strands are very close to each other. The separartiom distance is not large. That's why SSB proteins are not involved in this case. Because replication takes more time than transcription.