Genetic Code and Regulation problems
- 1. Translation begins
Options- A. at the replication fork
- B. on the lagging strand
- C. at the start codon
- D. in nucleus Discuss
Correct Answer: at the start codon
- 2. The sequence of one strand of DNA is: 5' ATTGCCA 3', what is the sequence of the other strand?
Options- A. 5' TAACGGT 3'
- B. 5' TGGCAAT 3'
- C. 5' ATTGCCA 3'
- D. 5' UAAGCCU3' Discuss
Correct Answer: 5' TGGCAAT 3'
- 3. Bacterial protein called catabolic activator protein (CAP) is an example of
Options- A. negative control of gene expression
- B. positive control of gene expression
- C. second type of positive control of gene expression
- D. none of the above Discuss
Correct Answer: second type of positive control of gene expression
- 4. 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
Correct Answer: CAU and CAC
- 5. In prokaryotes, AUG encodes
Options- A. methionine
- B. N-formyl methionine
- C. a stop codon
- D. alanine Discuss
Correct Answer: N-formyl methionine
- 6. Which of the following has been used as an evidence that primitive life forms lacked both DNA and enzymes?
Options- A. RNA can both code genetic information and act as a catalyst
- B. DNA and enzymes are only present in the most advanced cells
- C. Advanced cells lack RNA
- D. All of the above Discuss
Correct Answer: RNA can both code genetic information and act as a catalyst
- 7. The codons which do not specify an amino acid are called
Options- A. initiation code
- B. termination code
- C. propagation code
- D. none of these Discuss
Correct Answer: termination code
- 8. AUG codes for methionine act as a
Options- A. initiation code
- B. elongation code
- C. termination code
- D. propagation code Discuss
Correct Answer: initiation code
- 9. In protein synthesis in prokaryotes
Options- A. the initiating amino acid is N- formyl methionine
- B. the initiating amino acid is methionine
- C. the initiating amino acid is phenyl alanine
- D. none of the above Discuss
Correct Answer: the initiating amino acid is N- formyl methionine
- 10. In some organelles in eukaryotes, the genetic code for some codons
Options- A. differs from that used in prokaryotes
- B. are same
- C. are partially same
- D. none of the above Discuss
Correct Answer: differs from that used in prokaryotes
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