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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332

Solutions

Chapter
Section
BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332
Chapter 15, Problem 4SQ
Textbook Problem
20 views

For each species, all ________ in the complete set of chromosomes is the ________.

  1. a. genomes; library
  2. b. DNA; genome
  3. c. mRNA; start of cDNA
  4. d. cDNA; start of mRNA

Summary Introduction

Introduction: Genome of an organism is its complete genetic material. The genetic material in most organisms is deoxyribonucleic acid (DNA). DNA in cells is divided into structures called chromosomes that contain coiled DNA and DNA-related proteins. Each species has a characteristic number of chromosomes.

Explanation of Solution

Reason for correct answer:

Each species has a characteristic number of chromosomes. The total DNA material present in a species is called its genome. The DNA material in most cells is divided into structures called chromosomes that contain compactly coiled DNA and DNA-related proteins such as histones. Thus, total DNA in a complete set of chromosomes of a species is its genome.

Hence, the correct answer is option b.

Reason for incorrect answer:

Option a. is given as “genomes; library”.

Genome means the complete genetic material of a species. In molecular biology, a DNA library refers to a set of cells that contain different DNA fragments that together form a complete genome of an organism. Hence, option a. is incorrect.

Option c. is given as “mRNA; start of cDNA”...

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