Discussion
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- Question
Doubling the column's length increases resolution by a factor of
Options- A. (2)0.5
- B. 2
- C. 3
- D. 4
- Correct Answer
- (2)0.5
- 1. Helium is generally preferred as carrier gas over nitrogen and hydrogen because
Options- A. it is inert
- B. it has a lower viscosity
- C. it doubles up as a party gas for balloons and funny voices
- D. all of above Discuss
- 2. What does the selectivity factor describe?
Options- A. The proportional difference in widths of two chromatographic peaks
- B. The maximum number of different species which a column can separate simultaneously
- C. The relative separation achieved between two species
- D. None of the above Discuss
- 3. Column bleeding occurs when
Options- A. elution of the analyte is extended over time
- B. the column is cracked and stationary phase leaks out
- C. traces of the stationary phase are eluted
- D. the column breaks during installation and causes personal injury Discuss
- 4. Which of these effects result from slow injection of a large sample volume?
Options- A. Increased resolution
- B. Decreased resolution
- C. Non-linear detector response
- D. Constant resolution Discuss
- 5. Which of the following is not used for detection in GC?
Options- A. Infrared spectroscopy
- B. NMR
- C. Flame ionisation
- D. Electrical conductivity Discuss
- 6. The DNA polymerase in bacteria, responsible for DNA synthesis is
Options- A. Polymerase I
- B. Polymerase II
- C. Polymerase III
- D. all of these Discuss
- 7. Which of the following are short nucleotides strands made by DNA polymerase working in the opposite direction of the replication fork?
Options- A. Leading strands
- B. Okazaki fragments
- C. Primers
- D. Lagging strand Discuss
- 8. DNA replication results in
Options- A. two completely new DNA molecules
- B. two DNA molecules such that each one contains a strand of the original
- C. one new DNA molecules 1 old molecule
- D. one new molecule of RNA Discuss
- 9. Which of these drugs bind to DNA and cuts it, producing hydroxyl radicals?
Options- A. Bleomycin
- B. Erythromycin
- C. Tunicamycin
- D. All of these Discuss
- 10. The RNA primers used to initiate replication in E. coli
Options- A. result in Okazaki fragments on leading strand
- B. are removed by Pol I
- C. are joined together by DNA ligase
- D. are removed by helicase + ATP Discuss
Gas Chromatography problems
Search Results
Correct Answer: all of above
Correct Answer: The relative separation achieved between two species
Correct Answer: traces of the stationary phase are eluted
Correct Answer: Decreased resolution
Correct Answer: NMR
Correct Answer: Polymerase III
Correct Answer: Okazaki fragments
Correct Answer: two DNA molecules such that each one contains a strand of the original
Correct Answer: Bleomycin
Correct Answer: are removed by Pol I
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