Discussion
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- Question
In lysozyme catalysis, which of the following does not contribute?
Options- A. The abnormally high pKa of Glu35
- B. The strained conformation of the D sugar
- C. Formation of a covalent intermediate at Asp52
- D. Formation of a covalent intermediate at Ser195
- Correct Answer
- Formation of a covalent intermediate at Ser195
- 1. Which of the following is a positively charged matrix for ion exchange chromatography?
Options- A. CM cellulose
- B. DEAE cellulose
- C. Phosphocellulose
- D. None of these Discuss
- 2. 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
- 3. The mRNA from which of the following would contain a poly-A tail?
Options- A. A restriction endonuclease from E. coli
- B. Bacterial alpha-amylase
- C. Human insulin
- D. Bacteriophage DNA ligase Discuss
- 4. Thin layer chromatography is
Options- A. partition chromatography
- B. electrical mobility of ionic species
- C. adsorption chromatography
- D. none of the above Discuss
- 5. An essential amino acid is one that
Options- A. is essentially easy to synthesize
- B. is essential to flagella motion
- C. the body cannot synthesize
- D. the body can synthesize under essential conditions Discuss
- 6. In which of the following cell types more cellular detail can be observed using an electron microscope compared to a light microscope?
Options- A. Animal
- B. Bacterial
- C. Protist
- D. All of these Discuss
- 7. The peptide, Val-Lys-Glu-Met-Ser-Trp-Arg-Ala, was digested with cyanogen bromide (CNBr) to produce:
Options- A. Val-Lys + Glu-Met-Ser + Trp-Arg-Ala
- B. Val-Lys-Glu-Met-Ser-Trp + Arg-Ala
- C. Val-Lys-Glu-Met + Ser-Trp-Arg-Ala
- D. Val-Lys-Glu + Met-Ser-Trp-Arg-Ala Discuss
- 8. In the ?-pleated sheet
Options- A. hydrogen bonds are formed between the peptide bonds
- B. adjacent polypeptide chains can either be parallel or antiparallel
- C. the polypeptide chain is fully extended
- D. all of the above Discuss
- 9. The complex of RNA polymerase, DNA template and new RNA transcript is called
Options- A. transcription bubble
- B. replication bubble
- C. a translation bubble
- D. none of these Discuss
- 10. For every one molecule of sugar glucose which is oxidized __________ molecule of pyruvic acid are produced.
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
More questions
Correct Answer: DEAE cellulose
Correct Answer: are removed by Pol I
Correct Answer: Human insulin
Correct Answer: adsorption chromatography
Correct Answer: the body cannot synthesize
Correct Answer: All of these
Correct Answer: Val-Lys-Glu-Met + Ser-Trp-Arg-Ala
Correct Answer: all of the above
Correct Answer: transcription bubble
Correct Answer: 2
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