DNA Structure and Replication problems
- 1. In DNA, nucleotides are covalently joined together by
Options- A. 3', 5' phosphodiester bonds to form a repetitive sugar-phosphate chain
- B. 2', 5' phosphodiester bonds to form a repetitive sugar-phosphate chain
- C. 2', 3' phosphodiester bonds to form a repetitive sugar-phosphate chain
- D. 3', 4' phosphodiester bonds to form a repetitive sugar-phosphate chain Discuss
Correct Answer: 3', 5' phosphodiester bonds to form a repetitive sugar-phosphate chain
- 2. TM refers to the temperature at which
Options- A. membranes are 50% fluid
- B. 50% of a DNA molecule is denatured
- C. 50% of a protein molecules are denatured
- D. all of the above Discuss
Correct Answer: all of the above
- 3. Which polymerase is active in DNA repairing
Options- A. Polymerase I
- B. Polymerase II
- C. Polymerase III
- D. none of these Discuss
Correct Answer: Polymerase II
- 4. Proteins which help to open the double helix for DNA synthesis are
Options- A. DNA helicases
- B. single stranded binding proteins
- C. ligase
- D. DNA topoisomerase Discuss
Correct Answer: DNA helicases
- 5. The site on a bacterial chromosome that marks the initiation point for chromosome replication is called
Options- A. Ori
- B. a promoter
- C. Pro
- D. an initiation codon Discuss
Correct Answer: Ori
- 6. What is the exact name of the classical Watson-Crick double helix DNA?
Options- A. A-DNA
- B. B-DNA
- C. Z-DNA
- D. X-DNA Discuss
Correct Answer: B-DNA
- 7. First evident that DNA is genetic material comes from the experiment of Griffith is
Options- A. transduction
- B. transformation
- C. replication
- D. translation Discuss
Correct Answer: transformation
- 8. Which of the following is not a structural motif in DNA binding proteins?
Options- A. bZIP
- B. helix-turn-helix
- C. TFIID
- D. zinc finger Discuss
Correct Answer: TFIID
- 9. An RNA primer is synthesized by
Options- A. DNA helicases
- B. ligase
- C. DNA topoisomerase
- D. primase Discuss
Correct Answer: primase
- 10. What is the name given to the points at which a DNA helix is unwound and new strands develop?
Options- A. Replication origins
- B. Replication forks
- C. Leading strands
- D. Okazaki fragments Discuss
Correct Answer: Replication forks
More in Biochemistry:
Programming
Copyright ©CuriousTab. All rights reserved.