Chapter 14, Problem 8STP

Summary Introduction

To identify:

The sequence of base code and orientation of the complementary DNA strand from the given sequence in one strand of DNA molecule

Introduction:

Each DNA molecule consists of two strands of nucleotides joined together like a zipper to the nitrogenous bases. Both the strands have complementary base pairs. Adenine on one strand pairs with thymine on the other strand. Similarly cytosine on one strand pairs with guanine on the other strand.

Answer to Problem 8STP

The sequence of bases in the other strand would be 3’ACATCTGTGTTAATG 5’.

Explanation of Solution

Each DNA molecule consists of two strands. Both the strands have complementary base pairs.

It is given that the sequence in one strand is as follows:

5’TGTAGACACAATTAC 3’

The sequence in other strand would be complementary to the sequence in one strand. Its orientation will be opposite to the given strand. So it will be from 3’ to 5’.

Hence sequence in other strand would be 3’ACATCTGTGTTAATG 5’.