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- Question
The IPTG is a gratuitous inducers of (?-galactosidase, and x-gal is a chromogenic substrate. When ?-complementation occurs which colour is produced?
Options- A. Blue
- B. White
- C. Brown
- D. No colour is produced
- Correct Answer
- Blue
- 1. Chronic granulomatous disease results from a failure to perform oxidative burst. This deficiency would be most likely to interfere with
Options- A. CTL killing of viruses
- B. dendritic cell activation to become a mature APC
- C. infected cell processing of virus peptides
- D. macrophage intracellular killing of bacteria Discuss
- 2. What is the name of the protein signaling molecule that alters glucose uptake, and where would its receptors be located?
Options- A. Insulin; many different cell types that use glucose for fuel
- B. Insulin; beta cells of the pancreas
- C. PDGF; the blood
- D. NGF; the nerves involved in simple reflexes Discuss
- 3. In DNA double helix, the two DNA chains are held together by
Options- A. covalent bonds between the pair of bases
- B. hydrogen bonds between the pair of bases
- C. ionic bonds between the pair of bases
- D. none of the above Discuss
- 4. A human cDNA library
Options- A. contains DNA for specific human proteins
- B. contains DNA for virtually all of the human proteins in vectors
- C. cannot be used to obtain human genes because it would be radioactive
- D. none of the above Discuss
- 5. Why is it that inhaling nitric oxide reduces blood pressure only in the lung tissue and not elsewhere in the body*?
Options- A. Because other body tissues use a different signaling molecule
- B. Because nitric oxide cannot cross cell membranes and enter the blood
- C. Because nitric oxide breaks down quickly and thus cannot travel far
- D. None of the above Discuss
- 6. Which of the following is not the hydrophobic and aromatic amino acid?
Options- A. Phenylalanine
- B. Tyrosine
- C. Tryptophan
- D. None of these Discuss
- 7. Cholesterolemia means
Options- A. lack of functional LDL receptors
- B. lack of functional HDL receptor
- C. high sensitivity to fatty food intake
- D. none of the above Discuss
- 8. The E.coli pyruvic acid dehydrogenase complex is reported to
Options- A. decatalyze the oxidation of pyruvic acid to acetyl Co A and CO2
- B. Catalyze the oxidation of pyruvic acid to acetyl Co A and CO2
- C. retard the reduction of pyruvic acid to acetyl Co A and CO2
- D. Catalyze the reduction of pyruvic acid to acetyl Co A and CO2 Discuss
- 9. A retention gap is placed between the injector and the front of the column to
Options- A. retain contaminants and prevent them from reaching the column
- B. retain the sample and release it gradually to the column
- C. prevent backflush of the injected solution
- D. all of the above Discuss
- 10. For the unfolding reaction of Protein G, ∆H° =210.6 kJ/mol, this means that
Options- A. unfolding is favored enthalpically
- B. folding is favored enthalpically
- C. the entropy is positive at all temperatures
- D. the entropy is negative at all temperatures Discuss
More questions
Correct Answer: macrophage intracellular killing of bacteria
Correct Answer: Insulin; many different cell types that use glucose for fuel
Correct Answer: hydrogen bonds between the pair of bases
Correct Answer: contains DNA for virtually all of the human proteins in vectors
Correct Answer: Because nitric oxide breaks down quickly and thus cannot travel far
Correct Answer: None of these
Correct Answer: lack of functional LDL receptors
Correct Answer: Catalyze the oxidation of pyruvic acid to acetyl Co A and CO2
Correct Answer: retain contaminants and prevent them from reaching the column
Correct Answer: folding is favored enthalpically
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