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Exonucleases - Genetic Engineering MCQ Questions

Exonucleases MCQs : Here you will find MCQ Questions related to "Exonucleases" in Genetic Engineering. These Exonucleases MCQ Questions Will help you to improve your Genetic Engineering knowledge and will prepare you for various Examinations like Competitive Exams, Placements, Interviews and other Entrance Exmaniations.




Question 1

______________ are enzymes that work by cleaving nucleotides one at a time from the end (exo) of a polynucleotide chain

A. Polymerases
B. Transformation
C. Exonucleases
D. All of the above

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Question 2

Exonuclease IV adds a water molecule, so it can break the bond of an oligonucleotide to nucleoside 5' monophosphate

A. TRUE
B. FALSE
C. Can be true or false
D. Can not say

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Question 3

This exonuclease requires _____________ in order to function and works at higher temperatures than exonuclease

A. NA+
B. Ca2+
C. H+
D. Mg 2+

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Question 4

Exonuclease VIII is 5' to 3' dimeric protein requires a free 5' ________ to carry out its function

A. NA group
B. OH group
C. Ca group
D. H2O group

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Question 5

Which of the following is known to be in effect during transcriptional termination

A. DNA polymerase I
B. DNA polymerase II
C. RNA polymerase I
D. RNA polymerase II

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Question 6

Exonuclease V is a 3' to 5' hydrolyzing enzyme which requires Ca2+?

A. TRUE
B. FALSE
C. Can be true or false
D. Can not say

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Question 7

How many approaches are there which can be used for exonucleolytic activity in double stranded DNA molecules?

A. 1
B. 2
C. 3
D. 4

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Question 8

What is the mode of action of exonuclease III?

A. Exonuclease III acts on single stranded DNA in 3’-5’ direction
B. Exonuclease III acts on double stranded DNA in 5’-3’ direction
C. Exonuclease III acts on double stranded DNA in 3’-5’ direction
D. Exonuclease III acts on single stranded DNA in 5’-3’ direction

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Question 9

What is the function of methylase?

A. Addition of methyl groups to DNA
B. Removal of methyl groups from DNA
C. Both in removal and addition of methyl groups from DNA
D. It is used in production of methane gas

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Question 10

What happens if a DNA molecule is treated by first Exonuclease III and then followed by treatment with S1 nuclease?

A. The molecule is shortened only from 3’ end
B. The molecule is shortened only from 5’ end
C. The molecule is shortened from both the ends
D. Only Exonuclease acts and S1 doesn’t acts

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