Question

QUIZ 13 PROTEIN SYNTHESIS 1. The process where mRNA moves so that ribosomes can read each successive codon is referred to as A. Translation B. Transposition C. Translocation D. Transamination E. Transduction 2. The 2 amino acids have only a single codon. 1. Tryptophan 2. Methionine 3. N-formylphenylalanine 4. N-formylmethionine 5. Threonine A. 1 & 2 B. 1&3 c. 1 & 5 D. 2 & 3 E. 4 & 5 3. Peptide bonds linking the amino acids in protein synthesis is made by A. Polysome B. Peptidylase C. Ribozyme D. Peptidyl esterase E. Peptidyl transferase 4. What is the amino acid carried by initiator RNA in prokaryotes? A.Phenylalanine B. N-formylphenylalanine C. Methionine D. N-formylmethionine E. Alanine 5. Lane 1 contains DNA fragments of 100, 250, 300, 1000, and 2000 bp. Three DNA samples that might contain a 305 bp insert digested with Eco RI enzymes were loaded onto lane 2, lane 3, and lane 4 of the electrophoresis gel shown. Top Which lane(s) contain recombinant DNA? Wells- 1 2 3 4 A. Lane 1 B. Lane 2 C. Lane 3 D. Lanes 3 & 4 E. Lanes 2 & 3 - ITIL 1 Bottom

Answer 1

1. The process of synthesis of protein from mRNA is called translation.

Translocation is the transport of protein from one place to another.

Transposition is jumping of DNA from one position to another.

Transduction is the process of infecting a bacterium with a virus.

Transamination is the transfer of amino group from amino acid to another.

2. Methionine and tryptophan have only one codon.

So, the correct answer is A.

3. Peptide bond is made by peptidyl transferase. These enzymes catalyse the formation of peptide bond.

4. First amino acid is always methionine in eukaryotes.

In prokaryotes first amino acid will be N formyl methionine.

So, the correct answer is D.

5.

The correct answer will be lane 2 as it contains two bands.

So, the correct answer will be 2.

As if digests is there then there will be a band at 300.