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- Question
During successful purification scheme, this may be expected that the
Options- A. specific activity increases
- B. specific activity decreases
- C. number of proteins in the sample decreases
- D. both (a) and (c)
- Correct Answer
- both (a) and (c)
- 1. Transcription begins
Options- A. at the start codon
- B. upstream from the start codon
- C. downstream from the start codon
- D. none of these Discuss
- 2. Vibrational spectroscopy is
Options- A. a large mass on a weak spring
- B. a flashlight through a prism and shake it
- C. a class of spectroscopic techniques which analyzes molecular motions
- D. an Infrared spectroscopy Discuss
- 3. DNA replication takes place in which direction?
Options- A. 3' to 5'
- B. 5 'to 3'
- C. Randomly
- D. Vary from organism to organism Discuss
- 4. Sex lethal (sxl) in Drosophila is transcribed when
Options- A. the X autosome balance is less than 0.5
- B. the X autosome balance is 1 or greater
- C. the X autosome balance equals 0.5
- D. none of the above Discuss
- 5. Type I proteins (plasma membrane) have a
Options- A. cleavage N- terminal signal sequence and a hydrophobic stop transfer sequence
- B. cleavaged N- terminal signal sequence that doubles as the membrane anchoring sequence
- C. multiple signal sequence and a hydrophobic stop transfer sequence
- D. multiple signal sequence that doubles as the membrane anchoring sequence Discuss
- 6. Amino acids are joined together into a protein chain by which of the following?
Options- A. Transfer RNA
- B. DNA polymerase
- C. Hydrogen bonds
- D. Messenger RNA Discuss
- 7. What is the ELISA test intended to measure?
Options- A. Antibody to HIV only
- B. Antigen to HIV only
- C. Presence of free, circulating virus in the patient
- D. Antibodies directed against HLA molecules Discuss
- 8. The eluent strength is a measure of
Options- A. solvent adsorption energy
- B. solvent absorption energy
- C. solvent diffusivity
- D. solvent mixing index Discuss
- 9. What would happen if serum is omitted from the ELISA, but all other steps remain same?
Options- A. Anti-human Ig-conjugate would not bind and be washed away
- B. The OD values would be nearly the same as the assay control
- C. Both (a) and (b)
- D. Anti-human Ig-conjugate would bind non-specifically to the ELISA plate Discuss
- 10. In reversed phase HPLC, there is a
Options- A. non polar solvent/polar column
- B. polar solvent/non-polar column
- C. non polar solvent/non-polar column
- D. any of the above Discuss
More questions
Correct Answer: upstream from the start codon
Correct Answer: a class of spectroscopic techniques which analyzes molecular motions
Correct Answer: 5 'to 3'
Correct Answer: the X autosome balance is 1 or greater
Correct Answer: cleavage N- terminal signal sequence and a hydrophobic stop transfer sequence
Correct Answer: Transfer RNA
Correct Answer: Antibody to HIV only
Correct Answer: solvent adsorption energy
Correct Answer: Both (a) and (b)
Correct Answer: polar solvent/non-polar column
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