AP BIOLOGY

CELL DIVISION

THE CELL CYCLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following is true about DNA replication?
A
It results in 1 completely old and 1 completely new molecule of DNA
B
DNA ligase unzips the DNA to begin replication
C
Only one side of the DNA strand is replicated
D
It is a semi-conservative process
Explanation: 

Detailed explanation-1: -DNA replication is a semiconservative process, in the newly formed double-stranded DNA, one strand of original DNA is retained, which acts as a template for the formation of another strand.

Detailed explanation-2: -Which of the following statements is true regarding the semiconservative model of DNA replication? This model states that after DNA replication, each daughter DNA molecule consists of a new DNA strand and an intact parental DNA strand.

Detailed explanation-3: -One of the most important concepts of DNA replication is that it is a semi-conservative process (Figure 7.2. 7). This means that every double helix in the new generation of an organism consists of one complete “old” strand and one complete “new” strand wrapped around each other.

Detailed explanation-4: -This process is known as semi-conservative replication because two copies of the original DNA molecule are produced, each copy conserving (replicating) the information from one half of the original DNA molecule. Each copy contains one original strand and one newly-synthesized strand.

Detailed explanation-5: -Which statement describes the semiconservative model of DNA replication correctly? It proposes that the two nucleotide strands unwind and each serves as a template for a new DNA molecule.

There is 1 question to complete.