Discussion
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- Question
Which of the following species lack a 'classical' histone H1?
Options- A. Saccharomyces cerevisiae
- B. Strongylocentrotus purpuratus
- C. Xenopus laevis
- D. Arabidopsis thaliana
- Correct Answer
- Saccharomyces cerevisiae
- 1. The replication of a linear DNA molecule in a eukaryotic chromosome creates a problem which is reported to be sorted out by
Options- A. using enzyme called telomerase
- B. shortening of the double stranded replicated portion
- C. using RNA as a template
- D. none of the above Discuss
- 2. The role of primase is to
Options- A. dismantle RNA primer
- B. cleave and unwinds short sections of DNA ahead of the replication fork
- C. proofread base pairing
- D. synthesize an RNA primer to begin the elongation process Discuss
- 3. In DNA replication, one new strand is synthesized complementary to an old (parent) strand and is referred as
Options- A. mutational
- B. semiconservative
- C. discontinuous
- D. antiparallel Discuss
- 4. The melting of 40-45 bp at the oriC site of E. coli requires
Options- A. DNA + ATP + HU
- B. DNA + ATP + HU + DNAb
- C. DNA+ ATP + HU + DNAb + DNAa
- D. DNA + ATP + HU + DNAb + DNAa + Pol III holoenzyme Discuss
- 5. One hypothesis of DNA replication suggested that the parental DNA molecules are broken into fragments. Both strands of DNA in each of the daughter molecules are made up of an assortment of parental and new DNA. This statement refers to which hypothesis?
Options- A. Conservative theory
- B. Dispersive theory
- C. Semi-conservative theory
- D. Evolutionary theory Discuss
- 6. The enzyme responsible for breaking the hydrogen bonds, and thus separating the DNA strands during DNA synthesis is
Options- A. DNA polymerase
- B. strandase
- C. helicase
- D. none of these Discuss
- 7. The packing ratio of nucleosomes is about
Options- A. 6
- B. 8
- C. 7
- D. 9 Discuss
- 8. Each replication bubbles consists of
Options- A. 3 replication forks
- B. 2 replication forks
- C. 4 replication forks
- D. 1 replication forks Discuss
- 9. The nicks or gaps between Okazaki fragments are eventually sealed by
Options- A. gyrase
- B. DNA ligase
- C. RNA ligase
- D. polymerase Discuss
- 10. The rapid appearance of HIV-1 strains that are resistant to AIDS drugs is due in part to which of the following property of its reverse transcriptase?
Options- A. AZT (zidovudine) is too expensive to be taken in effective doses
- B. The RNase H domain of p66 causes error prone synthesis
- C. It lacks a proofreading exonuclease
- D. It has low affinity for the correct dNTP's Discuss
DNA Structure and Replication problems
Search Results
Correct Answer: using enzyme called telomerase
Correct Answer: synthesize an RNA primer to begin the elongation process
Correct Answer: semiconservative
Correct Answer: DNA + ATP + HU
Correct Answer: Dispersive theory
Correct Answer: helicase
Correct Answer: 7
Correct Answer: 2 replication forks
Correct Answer: DNA ligase
Correct Answer: It lacks a proofreading exonuclease
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