DISCOVER BIOLOGY-INQUIZITIVE ACCESS
DISCOVER BIOLOGY-INQUIZITIVE ACCESS
6th Edition
ISBN: 9780393644210
Author: SINGH-CUNDY
Publisher: NORTON
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Chapter 13, Problem 1SQ
Summary Introduction

Introduction: Deoxyribonucleic acid (DNA) can be split into many small pieces with the help of restriction enzyme. Restriction enzyme cut DNA at highly specific sites. It has evolved in bacteria where it play role against foreign DNA.

Expert Solution & Answer
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Answer to Problem 1SQ

Correct answer: Option c. is given as “restriction enzymes”

Therefore, option c. is correct.

Explanation of Solution

Reasons for the correct statement:

Restriction enzyme is highly specific to DNA sequence. It recognizes and cuts DNA where a unique site is present.

Hence, option c. is correct.

Reasons for the incorrect statement:

Option a. is given as “DNA ligase”. But, DNA ligase joins the DNA fragment.

So, option a. is incorrect.

Option b. is given as “DNA polymerase”. But, DNA polymerase synthesizes the DNA.

So, option b. is incorrect.

Option d. is given as “RNA polymerase”. But, RNA polymerase synthesize the mRNA strand by a process called transcription.

So, option d. is incorrect.

Hence, options a., b, and d. are incorrect.

Conclusion

Restriction endonuclease cuts DNA at highly specific target sequences.

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