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Home ‣ Biochemistry ‣ Genetic Code and Regulation Comments
- Question
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
- Correct Answer
- differs from that used in prokaryotes
- 1. 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
- 2. AUG codes for methionine act as a
Options- A. initiation code
- B. elongation code
- C. termination code
- D. propagation code Discuss
- 3. 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
- 4. 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
- 5. In prokaryotes, AUG encodes
Options- A. methionine
- B. N-formyl methionine
- C. a stop codon
- D. alanine Discuss
- 6. Which of the following techniques was carried out by Nirenberg and Matthaei in 1961 to determine the first codon?
Options- A. In vitro synthesis of a polypeptide using UUUUU
- B. Labeled peptide binding to a ribosome
- C. Mixed co-polymer mRNA synthesis
- D. none of the above Discuss
- 7. How many amino acids will be encoded by 5' GAU GGU UGA UGU 3' sequence?
Options- A. One
- B. Two
- C. Three
- D. Four Discuss
- 8. How many different codons are possible?
Options- A. 3
- B. 20
- C. 64
- D. An infinite number Discuss
- 9. Codon that specify the amino acids often differs in the
Options- A. first base
- B. second base
- C. third base
- D. none of these Discuss
- 10. Crick demonstrated that the genetic code involved three bases and suggested that the code was degenerated. What experimental technique Crick conducted to suggest genetic code degeneration?
Options- A. Gel electrophoresis
- B. Density gradient centrifugation
- C. Frameshift mutagenesis
- D. Restriction digests of the rII gene Discuss
Genetic Code and Regulation problems
Search Results
Correct Answer: the initiating amino acid is N- formyl methionine
Correct Answer: initiation code
Correct Answer: termination code
Correct Answer: RNA can both code genetic information and act as a catalyst
Correct Answer: N-formyl methionine
Correct Answer: In vitro synthesis of a polypeptide using UUUUU
Correct Answer: Two
Correct Answer: 64
Correct Answer: third base
Correct Answer: Frameshift mutagenesis
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