The leading and lagging strands differ in that

The leading and the lagging strands differ in that A) the leading strand is synthesized in the same direction as the movement of the replication fork, and the lagging strand is synthesized in the opposite direction. B) the leading strand is synthesized strand by adding nucleotides to the 3 end of the growing strand, and the lagging strand is synthesized by adding nucleotides to the 5 end. C) the lagging strand is synthesized continuously, whereas the leading strand is synthesized in short fragments that are ultimately stitched together. D) the leading strand is synthesized at twice the rate of the lagging strand. A new DNA strand elongates only in the 5 to 3 direction because A) DNA polymerase begins adding nucleotides at the 5 end of the template. B) Okazaki fragments prevent elongation in the 3 to 5 direction. C) the polarity of the DNA molecule prevents addition of nucleotides at the 3 end. D) replication must progress toward the replication fork. E) DNA polymerase can only add nucleotides to the free 3 end. What is the function of topoisomerase? A) relieving strain in the DNA ahead of the replication fork B) elongating new DNA at a replication fork by adding nucleotides to the existing chain C) methyl groups to bases of DNA D) unwinding of the double helix E) stabilizing single-stranded DNA at the replication fork What is the role of DNA ligase in the elongation of the lagging strand during DNA replication? A) It synthesizes RNA nucleotides make a primer. B) It catalyzes the lengthening of telomeres. C)It joins Okazaki fragments together. D) It unwinds the parental double helix. E) It stabilizes the unwound parental DNA. Which of the following help(s) to hold the DNA strands apart while they are being replicated? A) primase B) ligase C) DNA polymerase D) single-strand binding proteins E) exonuclease In the late 1950s, Meselson and Stahl grew bacteria in a medium containing heavy nitrogen and then transferred them to a medium containing^14N. Which of the results in the figure above would be expected after one round of DNA replication in the presence of^14N? A) A B) B C) C D) D E) The leading and the lagging strands differ in that A) the leading strand is synthesized in the same direction as the movement of the replication fork, and the lagging strand is synthesized in the opposite direction. B) the leading strand is synthesized strand by adding nucleotides to the 3′ end of the growing strand, and the lagging strand is synthesized by adding nucleotides to the 5′ end. C) the lagging strand is synthesized continuously, whereas the leading strand is synthesized in short fragments that are ultimately stitched together. D) the leading strand is synthesized at twice the rate of the lagging strand. A new DNA strand elongates only in the 5 to 3 direction because A) DNA polymerase begins adding nucleotides at the 5′ end of the template. B) Okazaki fragments prevent elongation in the 3′ to 5′ direction. C) the polarity of the DNA molecule prevents addition of nucleotides at the 3′ end. D) replication must progress toward the replication fork. E) DNA polymerase can only add nucleotides to the free 3′ end. What is the function of topoisomerase? A) relieving strain in the DNA ahead of the replication fork B) elongating new DNA at a replication fork by adding nucleotides to the existing chain C) methyl groups to bases of DNA D) unwinding of the double helix E) stabilizing single-stranded DNA at the replication fork What is the role of DNA ligase in the elongation of the lagging strand during DNA replication? A) It synthesizes RNA nucleotides make a primer. B) It catalyzes the lengthening of telomeres. C)It joins Okazaki fragments together. D) It unwinds the parental double helix. E) It stabilizes the unwound parental DNA. Which of the following help(s) to hold the DNA strands apart while they are being replicated? A) primase B) ligase C) DNA polymerase D) single-strand binding proteins E) exonuclease In the late 1950s, Meselson and Stahl grew bacteria in a medium containing “heavy” nitrogen and then transferred them to a medium containing^14N. Which of the results in the figure above would be expected after one round of DNA replication in the presence of^14N? A) A B) B C) C D) D E)

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Reason:
During the process of cell division,
the genetic material is divided by means of a process called “DNA
replication.” Replication of DNA (deoxyribonucleic acid) results in
the formation of two new double stranded DNA molecules. The new DNA
helix now contains one old strand (parental) and one new strand
hence, this process is named as “semiconservative replication.” DNA
polymerase II is an enzyme that essentially enables DNA replication
in semiconservative manner.
Synthesis of DNA is conserved: It
describes that the one DNA strand is going to act as a template for
“for a newly synthesized daughter strand of DNA”.
Discontinues: The synthesis of DNA
is often referred as semi-discontinuous in which the synthesis of
DNA of leading strand is considered as continuous as in the
direction of replication fork, it occurs from 5 prime to 3
prime
Continuous: In this the synthesis of
DNA during DNA replication to form a lagging strand synthesis i.e.
discontinuous 5′-3′ & it is in the opposite direction to
replication fork
leading and the lagging strands differ in that he leading strand is synthesized in the same direction as the movement of the replication fork, and the lagging strand is synthesized in the opposite direction B) the leading str nd is synthesized by addling nucleotides to the 3′ end of the growing strand, and the eging strand is synthesized by adding nucleotides to the 5′ end. C) the lagging strand is synthesized continuousy, whereas the leading strand is synthesized in short fragments that are ultimately stitched together D) bj the leading strand is synthesized at twice the rate of the lagging strand 20) A new DNA strand elongates only in the 5′ to 3′ direction because A) DNA polymerase begins adding nucleotides at the 5′ end of the template. B) Okazaki fragments prevent elongation in the 3 to 5′ direction. C) th polarity D plication must progress toward the replication fork. f the DNA molecule prevents addition of nucleotides at the 3′ end. NA polymerase can only add nucleotides to the free 3’end. 21What is the function of topoisomerase relieving strain in the DNA ahead of the replication fork 8) elongating new DNA at a replication fork by adding nucleotides to the existing chain C) adding methyl groups to bases of DNA E) stabilizing single-stranded DNA at the replication fork D) unwinding of the double helx
The leading and the lagging strands differ in that A) the leading strand is synthesized in the same direction as the movement of the replication fork, and the lagging strand is synthesized in the opposite direction. B) the leading strand is synthesized strand by adding nucleotides to the 3 end of the growing strand, and the lagging strand is synthesized by adding nucleotides to the 5 end. C) the lagging strand is synthesized continuously, whereas the leading strand is synthesized in short fragments that are ultimately stitched together. D) the leading strand is synthesized at twice the rate of the lagging strand. A new DNA strand elongates only in the 5 to 3 direction because A) DNA polymerase begins adding nucleotides at the 5 end of the template. B) Okazaki fragments prevent elongation in the 3 to 5 direction. C) the polarity of the DNA molecule prevents addition of nucleotides at the 3 end. D) replication must progress toward the replication fork. E) DNA polymerase can only add nucleotides to the free 3 end. What is the function of topoisomerase? A) relieving strain in the DNA ahead of the replication fork B) elongating new DNA at a replication fork by adding nucleotides to the existing chain C) methyl groups to bases of DNA D) unwinding of the double helix E) stabilizing single-stranded DNA at the replication fork What is the role of DNA ligase in the elongation of the lagging strand during DNA replication? A) It synthesizes RNA nucleotides make a primer. B) It catalyzes the lengthening of telomeres. C)It joins Okazaki fragments together. D) It unwinds the parental double helix. E) It stabilizes the unwound parental DNA. Which of the following help(s) to hold the DNA strands apart while they are being replicated? A) primase B) ligase C) DNA polymerase D) single-strand binding proteins E) exonuclease In the late 1950s, Meselson and Stahl grew bacteria in a medium containing heavy nitrogen and then transferred them to a medium containing^14N. Which of the results in the figure above would be expected after one round of DNA replication in the presence of^14N? A) A B) B C) C D) D E)

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