Question

DNA stores the information needed to build and control the cell. The transmission of this information from mother to daughter cells is called vertical gene transfer and it occurs through the process of DNA replication. Use the model to explain how the structure of DNA faciltates the process of DNA replication?


A) Two complementary DNA molecules open. Strands from the two are swapped, and the two DNA strands become four.

B) During DNA replication, the molecule unzips and each side provides a template for the new side of the ladder following the base pair rule.

C) Individual nucleotides are carried via mRNA into the nucleus to match each unpaired nitrogen base, exposed during the opening of the DNA molecule.

D) DNA polymerase unzips the DNA molecule. It then reads each strand and sends a signal to tRNA to bring the correct nitrogen base to each exposed site.

Answer 1

Answer:

The correct answer is : B.

Explanation:

• DNA replication in prokaryotes involve the following steps :

1. Topoisomerase enzymes are responsible for uncoiling the DNA supercoils.
2. Helicase enzyme unwinds the double stranded DNA into single strands.
3. Primase enzyme generates short RNA primers that are complementary to DNA sequence.
4. DNA polymerase III elongates the primers and produces the daughter strands complementary to the parent strand.
5. DNA polymerase I replace the RNA primers with DNA sequence.
6. DNA Ligase joins the gaps in between the DNA sequences.

Answer 2

Answer:

b

Explanation:

i did the usatestprep