Question

1. During translation of a gene sequence in prokaryotes, which of the following is/are true

A. Any AUG can serve as a start condon

B. Termination uses rho factor or hairpin structures

C. Termination requires nonsense codons

D. Splicing does NOT need to occur

E. The replication fork sets out in both direction

F. Sigma factor is required for correct start site selection

2. Select the best answer/answers: Which of the following statements is CORRECT concerning the Genetic code?

A. AUG is the start codon

B. The codons are overlapping

C. The code is (nearly) universal

D. There as 3 nonsense condons

3. Select the best answer: Which of the following statements is NOT CORRECT concerning the Genetic code?

A. There are multiple codons for the same amino acid

B. There are 3 nonsense codons

C. AUG is the start codon

D. It is overlapping

E. it is considered universal or nearly universal

Answer 1

Answer 1) option a and c.

​​​​During translation of a gene sequence in prokaryotes, termination requires nonsense codons and any AUG can serve as start codon.

Nonsense codons i.e stop codons terminates the translation in prokaryotes.
During termination in translation of prokaryotes, releasing factors recognise and binds to nonsense codon and thereby actives the ribosome to hydrolyse the bond between tRNA and polypeptide thus dissociating the translation component complex.

Answer 2) option A, C and D are correct.
In genetic code, AUG is the start codon coding for amino acid Methionine.
The code is (nearly) universal, i.e same code is used throughout the life forms.
There are 3 nonsense condons, UAA, UAG, UGA.
The codons are non overlapping.
Answer 3) option A and D are not correct.

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