Chapter 25, Problem 40A

Summary Introduction

Introduction:

The DNA or the deoxyribonucleic acid is the molecule that contains all the genetic information of the organism and is responsible for all the characteristics of the organism. It works by producing protein, which carry out the different processes in the organism. The DNA is transcribed to the mRNA and mRNA is translated to proteins.

Answer to Problem 40A

Correct Answer:

Option (A) 2, 1, 3, 4.

Explanation of Solution

Explanation/justification for the correct answer:

Option (A) 2, 1, 3, 4. The translation is the process of making amino acid chain from the mRNA sequence. The process of translation involved three types of molecules, ribosomes, mRNA and tRNA. The mRNA carrying information in a codon (three nucleotides that codes for an amino acid) sequence to the ribosome and get attached to it. The ribosome has a site of attachment of tRNA, where the tRNA comes at the p site and recognizes the codon in mRNA. According to the codon, tRNA brings amino acid at A site and once a proper amino acid is added to the chain, the tRNA moves to E site.

Explanation for incorrect answer:

All the other sequences, do not follow the steps of translation, hence, option (B), (C), and (D) are incorrect