THE MOLECULAR BASIS OF INHERITANCE
DNA REPLICATION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
two DNA molecules each with one strand of new DNA and one strand original DNA
|
|
|
one DNA molecule with one strand of new DNA and one strand original DNA and another DNA molecule with two new DNA strands
|
|
|
one DNA molecule with 2 new DNA strands and one DNA molecule with 2 original DNA strands
|
Detailed explanation-1: -Conservative Replication The DNA replicates itself to make multiple copies in this process. In conservative replication, two DNA copies are produced from one original DNA, which serves as a template. Out of these two, one is entirely new DNA, and the other is made of old DNA strands.
Detailed explanation-2: -During DNA replication, one new strand (the leading strand) is made as a continuous piece. The other (the lagging strand) is made in small pieces. DNA replication requires other enzymes in addition to DNA polymerase, including DNA primase, DNA helicase, DNA ligase, and topoisomerase.
Detailed explanation-3: -Semi-conservative replication. In this model, the two strands of DNA unwind from each other, and each acts as a template for synthesis of a new, complementary strand. This results in two DNA molecules with one original strand and one new strand.
Detailed explanation-4: -The result of DNA replication is two DNA molecules consisting of one new and one old chain of nucleotides. This is why DNA replication is described as semi-conservative, half of the chain is part of the original DNA molecule, half is brand new.