Vector Systems MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Vector Systems, a fundamental topic in the field of Genetic Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Vector Systems MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Vector Systems mcq questions that explore various aspects of Vector Systems problems. Each MCQ is crafted to challenge your understanding of Vector Systems principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Genetic Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Vector Systems MCQs are your pathway to success in mastering this essential Genetic Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Vector Systems. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Vector Systems knowledge to the test? Let's get started with our carefully curated MCQs!

Vector Systems MCQs | Page 5 of 9

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Q41.
Choose the correct statement with respect to lysogen and prophage.

a.

The integrated phage is called as lysogen

b.

The infected bacterial cell is called a prophage

c.

If there is only growth of few lysogens, the E. coli lawn would be turbid

d.

If lysogens won’t be formed, the plaques won’t be clear

Discuss
Answer: (c).If there is only growth of few lysogens, the E. coli lawn would be turbid
Q42.
Choose the incorrect statement for cro and Q proteins.

a.

They are required for the lytic life cycle to continue

b.

Cro protein inactivates the PRM promoter

c.

The Q protein is responsible for the expression of late genes

d.

cII protein is required for the lytic life cycle to continue

Discuss
Answer: (d).cII protein is required for the lytic life cycle to continue
Q43.
Induction of lysogen takes place because of __________

a.

Low levels of cII gene

b.

Low level of cI gene

c.

Low levels of both cI and cII gene

d.

High levels of both cI and cII gene

Discuss
Answer: (b).Low level of cI gene
Q44.
Which of the phage genes are responsible for phage excision?

a.

xis gene

b.

int gene

c.

recA protein

d.

both xis and int gene

Discuss
Answer: (d).both xis and int gene
Q45.
How many phases are there for replication of lambda DNA to take place?

a.

1

b.

2

c.

3

d.

4

Discuss
Answer: (b).2
Q46.
The phase generating additional circular DNA molecules in the first phase does it by __________

a.

bidirectional theta mode

b.

rolling circle mode

c.

separation of the two strands

d.

copying only one strand

Discuss
Answer: (a).bidirectional theta mode
Q47.
Choose the incorrect statement with respect to rolling circle replication.

a.

It is for a single replication fork and yields a concatemeric molecule

b.

Staggered cleavage of DNA takes place at the cos sites

c.

The cleavage generates 10 nucleotide long overhangs

d.

Without the cos sites, the packaging won’t be possible

Discuss
Answer: (c).The cleavage generates 10 nucleotide long overhangs
Q48.
Insertion vectors are a type of vectors. Choose the correct statement for this type of vector.

a.

These are complex vectors

b.

DNA is inserted through many restriction sites

c.

There is an upper limit on the size of the DNA to be packaged

d.

Lambda gt09 is an example of this type of vector

Discuss
Answer: (c).There is an upper limit on the size of the DNA to be packaged
Q49.
Choose the correct statement for lambda gt10.

a.

It is having an EcoRI site

b.

It is having cII gene

c.

It accepts an insert of size greater than that of 8 kbp

d.

This size is less than that the size which is generally accepted by wild type phage

Discuss
Answer: (a).It is having an EcoRI site
Q50.
The presence of insert leads to inactivation of which gene?

a.

cII

b.

cI

c.

cIII

d.

both cII and cIII

Discuss
Answer: (b).cI
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