Discussion
Home ‣ Biochemistry ‣ DNA Structure and Replication Comments
- Question
How does ethidium bromide interact with DNA?
Options- A. It binds to adenine
- B. It binds to phosphate
- C. It intercalates between bases
- D. It does not interact
- Correct Answer
- It intercalates between bases
- 1. Which of the following is correct?
Options- A. Replication starts at a single origin
- B. Replication is bidirectional
- C. Replication is semi conservative
- D. All of the above Discuss
- 2. After one replication in 15N, how many bands should be observed in a cesium chloride gradient?
Options- A. One
- B. Two
- C. Three
- D. A smear Discuss
- 3. DNA polymerases I also has
Options- A. 5'-3' exonuclease activity
- B. 3'-5'exonuclease activity
- C. both (a) and (b)
- D. 5'-3' endonuclease activity Discuss
- 4. Nucleosome is
Options- A. an octamer of four histones with H1 protein
- B. an hexamer of three histones with H1 protein
- C. an hexamer of three histones without H1 protein
- D. an octamer of four histones without H1 protein Discuss
- 5. Number of times the two DNA strands are interwined in circular DNA and is known as
Options- A. helix frequency
- B. linking number
- C. twisting number
- D. none of these Discuss
- 6. Replication in E. coli is initiated by the generation of short RNA primers using
Options- A. RNA polymerase
- B. primase
- C. reverse transcriptase
- D. both (a) and (b) Discuss
- 7. In a typical electrophoresis experiment, larger fragments of DNA move more
Options- A. slowly, so they appear nearer the top of a gel photograph
- B. quickly, so they appear nearer the top of a gel photograph
- C. slowly, so they appear nearer the bottom of a gel photograph
- D. quickly, so they appear nearer the bottom of a gel photograph Discuss
- 8. 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
- 9. 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
- 10. 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
DNA Structure and Replication problems
Search Results
Correct Answer: All of the above
Correct Answer: One
Correct Answer: 3'-5'exonuclease activity
Correct Answer: an octamer of four histones without H1 protein
Correct Answer: linking number
Correct Answer: both (a) and (b)
Correct Answer: slowly, so they appear nearer the top of a gel photograph
Correct Answer: Dispersive theory
Correct Answer: DNA + ATP + HU
Correct Answer: semiconservative
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