Zoology MCQs for Lecturer PPSC FPSC KKPSC SPSC Test No. 44

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There will be 25 multiple choice question in the test.
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Test Instructions:-
Test Name	Lecturer Zoology
Subject	Zoology Test 44
Test Type	MCQs
Total Questions	25
Total Time	20 Minutes
Total Marks	100

You have 20 minutes to pass to the quiz.

Lecturer Zoology Online Test No. 44

1 / 25

What technique takes advantage of the charge on molecules by using an electrical field to provide the force necessary to separate the molecules based on size?

PCR

Hybridization

Northern Blot

2 / 25

Telomeres ___.

Get longer continued cell division

Are found in both prokaryotic and eukaryotic cells

Get shorter with continued cell division

3 / 25

Who is credited with discovering the structure of the DNA double helix?

Jacob and Monod

Watson and Crick

Avery, McCarty

Griffith

4 / 25

Which technique will identify specific mRNA products?

Southern analysis

PCR

RFLP analysis

Northern analysis

5 / 25

DNA polymerase adds nucleotides to the___Of the leading strands, and to the____of the lagging strands (Okazaki fragments).

5' end....3' end

3'end......5'end

5' end.....5' end

3' end....3' end

6 / 25

The experiments of Meselson and Stahl showed that DNA____.

Is the genetic material

Replicates in a semiconservative fashion

Contains complementary base pairing

Codes for the sequence of amino acids in proteins.

7 / 25

The most flexible and common host used for molecular cloning is a:

Protein

Plasmid

Virus

Bacterium

8 / 25

The removal of the RNA primer and addition of DNA nucleotides to the 3' end of Okazaki fragments in its place is carried out by____.

Nuclease

Primase

DNA polymerase I

DNA polymerase III

9 / 25

Which of the following components is (are) required for DNA replication?

Ribosomes

Transfer RNA

RNA primer

RNA polymerase

10 / 25

The rate of elongation in prokaryotes is ___ the rate in eukaryotes.

Much slower than

At about the same speed as

Much faster than

Sometimes faster and sometimes slower than

11 / 25

One strand of a DNA molecule has the base sequences 5'-ATAGGT-3'. The complementary base sequence on the other strand of DNA will be 3'___5'.

TATCCA

TGGAUA

UAUCCA

12 / 25

The primer required to initiate synthesis of a new DNA strand consist of:

RNA

DNA

An Okazaki fragment

A structural protein

13 / 25

The unwinding of DNA at the replication fork causes twisting and strain in the DNA ahead of the fork, which is relieved by an enzyme called___.

Relievase

Primase

Ligase

Topoisomerase

14 / 25

DNA fingerprinting is used:

To provide a means of identifying identical DNA sequences

As a forensics tool to provide evidence in a criminal case

To identify genetic diseases

To sequence fragments of DNA.

15 / 25

A particular gene measures about 1 um in length along a double stranded DNA molecule . What is the approximate number of base pairs in this gene:

1000

3000

16 / 25

Telomerase___.

Is an enzyme made up of protein and RNA that lengthens Telomeres

Speeds cell aging

Slow the rate of cancer cell growth

17 / 25

Individuals with the disorder xeroderma pigmentosum___.

Are hypersensitive to sunlight

Have high rates of skin cancer

Often have inherited defects in the nucleotide excision repair system

All of the above

18 / 25

At each end of a DNA replication bubble is ___.

An origin of replication

A gene

A telomere

A replication fork

19 / 25

The most common host bacterium used in cloning is:

E. coli

S. aureus

V. laevis

A. tumefaciens.

20 / 25

Unlike Prokaryotic DNA replication, replication of eukaryotic chromosomes___.

Involves two leading strands and no lagging strands

Cannot be completed by DNA polymerase

Is semiconservative

Has a single origin

21 / 25

In analyzing the number of different bases in a DNA sample, which result would be consistent with the base pairing rules?

A=G

A + G =C + T

A + T

A = C

22 / 25

Which of the following enzymes is not involved in nucleotide excision repair?

Nuclease

DNA polymerase

Ligase

Primase

23 / 25

The method of determining the base sequence of DNA is :

PCR

Gene cloning

DNA fingerprinting

DNA sequencing

24 / 25

What enzyme joins Okazaki fragments?

DNA polymerase

DNA ligase

Topoisomerase

Helicase

25 / 25

During the replication of DNA,__.

Both strands of a molecule act as templates

. The reaction is catalyzed by RNA polymerase

Errors never occur

Only one strand of the molecule acts as a template

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