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- Question
Fluorescence occurs when
Options- A. a molecule returns to the electronic ground state from an excited triplet state by losing it's excess energy as a photon
- B. a molecule returns to the electronic ground state from an excited singlet state by losing it's excess energy as a photon
- C. a molecule lowers its vibrational energy by losing it's excess energy as a photon
- D. none of the above
- Correct Answer
- a molecule returns to the electronic ground state from an excited singlet state by losing it's excess energy as a photon
- 1. Proteins separation can be carried out on the basis of
Options- A. net charge
- B. solubility in salt solutions
- C. size or mass
- D. all of these Discuss
- 2. Phosphofructokinase, the major flux-controlling enzyme of glycolysis is allosterically inhibited and activated respectively by
Options- A. ATP and PEP
- B. AMP and Pi
- C. ATP and ADP
- D. Citrate and ATP Discuss
- 3. RNA is synthesized on a DNA template in a process called __________ , which utilizes the enzyme __________
Options- A. translation, RNA polymerase
- B. transcription, DNA polymerase
- C. transcription, RNA polymerase
- D. replication, DNA polymerase Discuss
- 4. Degenerated codon differs mostly in
Options- A. the identities of their second base
- B. the identities of their third base
- C. the wobble position
- D. both (b) and (c) Discuss
- 5. 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
- 6. 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
- 7. 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
- 8. 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
- 9. 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
- 10. 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
More questions
Correct Answer: all of these
Correct Answer: ATP and ADP
Correct Answer: transcription, RNA polymerase
Correct Answer: both (b) and (c)
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
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