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- Question
Why are several structural genes regulated as a unit in bacteria?
Options- A. An accident of evolution
- B. It allows coordinating regulation of genes with a common function
- C. The bacteria chromosome is so small; many different genes must be controlled by the same promoter
- D. none of the above
- Correct Answer
- It allows coordinating regulation of genes with a common function
- 1. Cleavage of DNA by EcoRI endonuclease results in the formation of
Options- A. two 3'-OH ends and two 5'-phosphate ends
- B. one 3'-OH end and one 5'-phosphate end
- C. two 3'-phosphate ends and two 3'-OH ends
- D. one 3'-OH end and two 5'-phosphate end Discuss
- 2. Which of the following is correct in terms of determination of location of genetic traits?
Options- A. Known protein coding sequences are too far apart to allow linkage determination for most new genes
- B. Restriction sites allow DNAs to be digested
- C. Protein-coding genes are always associated with a restriction pattern
- D. None of the above Discuss
- 3. An oil drop with a polar coat is a metaphor referring to the three dimensional structure of
Options- A. fibrous proteins
- B. collagen
- C. globular proteins
- D. silk protein Discuss
- 4. Which of the following processes involve the combining of a message from one signaling molecule with that of another to either enhance or inhibit a cellular effect?
Options- A. Signal transduction
- B. Signal reception
- C. Signal integration
- D. Signal amplification Discuss
- 5. A person with phenylketonuria will convert
Options- A. phenylalanine to phenylpyruvate
- B. phenylalanine to isoleucine
- C. phenylpyruvate to phenylalanine
- D. tyrosine to phenylalanine Discuss
- 6. The genetic code is degenerated. Which of the following codons represents the principle of degeneracy?
Options- A. UAA and UAC
- B. AUG and AUA
- C. CAU and CAC
- D. UUA and UUC Discuss
- 7. Attractive Vander Waals forces occur between
Options- A. apolar molecules in the liquid state
- B. any pair of nearby atoms
- C. polar molecules in the solid state
- D. only if other forces are less favorable Discuss
- 8. A gradient elution in HPLC is one in which the composition of the solvent
Options- A. remains constant
- B. is changed continuously or in a series of steps
- C. both (a) and (b)
- D. none of the above Discuss
- 9. A combination of paper chromatography and electrophoresis involves
Options- A. partition chromatography
- B. electrical mobility of the ionic species
- C. both (a) and (b)
- D. none of these Discuss
- 10. In algae, photosynthesis takes place in
Options- A. choloroplasts
- B. cell membrane
- C. mitochondria
- D. none of the above Discuss
More questions
Correct Answer: two 3'-OH ends and two 5'-phosphate ends
Correct Answer: Known protein coding sequences are too far apart to allow linkage determination for most new genes
Correct Answer: globular proteins
Correct Answer: Signal integration
Correct Answer: phenylalanine to phenylpyruvate
Correct Answer: CAU and CAC
Correct Answer: any pair of nearby atoms
Correct Answer: is changed continuously or in a series of steps
Correct Answer: both (a) and (b)
Correct Answer: choloroplasts
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