Translation

The association of two subunits of the ribosome in translation is governed by the concentration of

• Mg2+

• Ca2+

• ATP

• H+

Amino acids which are specified by single codons are

• phenylalanine and arginine

• tryptophan and methionine

• valine and proline

• methionine and arginine.

If a sequence in a DNA molecule is AAA, then what will be the anti-codon for it ?

• UUU

• AAA

• UAU

• AUG

Some amino acids are coded by more than one codon, hence the genetic code is

• specific

• degenerate

• Non-overlapping

• unambiguous

How many amino acids will present in the protein coded by an mRNA, consisting of total 429 nucleotides and U, A and A nucleotides at 151, 152 and 153 positions respectively?

• 143

• 428

• 142

• 50

For initiation of translation, initiator tRNA binds to

• hnRNA

• AUG codon

• UTRs

• Promoter

Which of the following mRNA will be translated fully ?

• AUG AAU UGG UAU UGA GUG

• AUG GCU UAA AAU UGG GAG AGG UUU

• AUG UAG GUU GCU

• AUG UAU UUG GUU CUG

What is the cofactor required for the amino acid activation by tRNA synthetase enzyme during translation?

• ADP

• ATP

• AMP

• GTP

Which of the following is not a terminator codon?

• UAA

• UGA

• UAG

• UGU

In Escherichia coli, how many codons code for the standard amino-acids?

• 64

• 60

• 61

• 20