Class 12 Biology · Chapter 7 · Test 4
Translation and Gene Regulation
35 MCQs
35 questions · 30 min · 35 marks
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Sample questions
The first 5 of 35. Try each one, then tap to see the answer.
Question 1
Which of these happens first during protein synthesis?
- APeptide bond formation
- BBinding of aminoacyl tRNA with ribosome
- CTranslocation
- DBinding of release factor with ribosome
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Answer: B
Initiation begins with the aa-tRNA binding to the small ribosomal subunit before elongation.
Question 2
The synthesis of protein chains is initiated with the amino acid:
- AArginine
- BMethionine
- CSerine
- DValine
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Answer: B
The start codon AUG specifies methionine.
Question 3
The main function of tRNA is to:
- ABind the mRNA with the smaller ribosomal subunit
- BForm a portion of ribosomes
- CBind the complementary RNA and DNA strands together
- DBring amino acids from the cytoplasm to the ribosomes
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Answer: D
tRNAs carry specific amino acids to the ribosome.
Question 4
In translation the information in mRNA is used to direct the sequence of:
- ANucleotides
- BAmino acids
- CFatty acids
- DSugars
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Answer: B
A polypeptide is produced.
Question 5
The enzyme that attaches amino acids to specific tRNAs is:
- AAminoacyl-tRNA synthetase
- BPeptidyl transferase
- CRNA polymerase
- DHelicase
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Answer: A
It makes aminoacyl-tRNA.
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