Biology Test 314

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Biology Test 314

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Weekly Quiz Competition

Question 1
4 / -1

Why is PCR (Polymerase Chain Reaction) important in the field of biotechnology?

A
It is used to create transgenic animals.

B
It allows for the amplification of small DNA samples for further analysis.

C
It is a method for introducing new genes into plants.

D
It increases the nutritional content of genetically modified foods.

Solution

PCR (Polymerase Chain Reaction) is important in the field of biotechnology because it allows for the amplification of small DNA samples for further analysis. This technique enables scientists to generate millions of copies of a specific DNA segment quickly, which is crucial for various applications, including genetic testing, forensic analysis, and the diagnosis of diseases. PCR's ability to amplify DNA from minute samples has revolutionized genetic research and diagnostics.
Question 2
4 / -1

What is the primary purpose of creating genetically modified (GM) crops?

A
To make the crops glow in the dark for aesthetic purposes

B
To increase resistance to diseases, pests, and abiotic stresses

C
To decrease the crop's growth time significantly

D
To eliminate the need for sunlight in crop production

Solution

The primary purpose of creating genetically modified (GM) crops is to increase their resistance to diseases, pests, and abiotic stresses such as drought, salinity, and extreme temperatures. This genetic modification aims to improve crop yield and quality, reduce the reliance on chemical pesticides, and enhance nutritional content, thereby contributing to sustainable agriculture and food security. GM technology has led to the development of crops with traits that would be difficult or impossible to achieve through traditional breeding methods.
Question 3
4 / -1

Ethanol precipitation without RNase treatment will-

A
precipitate only DNA

B
precipitate both DNA and RNA

C
precipitate only RNA

D
not precipitate RNA

Solution

Ethanol can precipitate both RNA and DNA
Question 4
4 / -1

What is the primary function of DNA in organisms?

A
Acts as the primary structural component of cells

B
Serves as the genetic material carrying the instructions for development and functioning

C
Functions mainly as a catalyst in biochemical reactions

D
Provides energy for cellular processes

Solution

DNA serves as the genetic material in most organisms, carrying the instructions needed for an organism's development, functioning, and reproduction. It encodes the information necessary to build and maintain an organism's cells and passes genetic traits to offspring.
Question 5
4 / -1

Mark correctly matched

(1) DNA precipitation - spooling

(2) gel electrophoresis - isolation of DNA

(3) Emphysema - alpha-1- antitypsin

(4) blue white selection - tetracycline resistance

A
1

B
2

C
3

D
4

Solution

alpha-1- antitypsin Cure Emphysema
Question 6
4 / -1

Which of the following is NOT a component of a nucleotide?

A
A nitrogenous base

B
A pentose sugar

C
A phosphate group

D
An amino acid

Solution

A nucleotide is made up of three components: a nitrogenous base, a pentose sugar (ribose in RNA and deoxyribose in DNA), and a phosphate group. An amino acid is not a part of a nucleotide; it is the building block of proteins.
Question 7
4 / -1

Which step involve phosphodiester bond formation in PCR-

A
Denaturation

B
Annealing

C
Extension

D
all
Question 8
4 / -1

Who proposed the double helix model of DNA?

A
Rosalind Franklin

B
Maurice Wilkins

C
James Watson and Francis Crick

D
Erwin Chargaff

Solution

James Watson and Francis Crick proposed the double helix model for the structure of DNA in 1953, based on X-ray diffraction data produced by Maurice Wilkins and Rosalind Franklin, and the base pairing rules observed by Erwin Chargaff.
Question 9
4 / -1

In A test tube ‘PCR’ is carried out with primers , if DNA amplication or PCR cycle require 3 min and we start with single DNA piece than DNA amplification stops after –

A
15 min

B
12 min

C
23 min

D
none

Solution

PCR stop when nucleotide or Primer gent finish
Question 10
4 / -1

What is the role of RNA in protein synthesis?

A
Acts as the genetic material in most organisms

B
Serves as the primary structural component of ribosomes

C
Functions as a messenger, carrying instructions from DNA for protein synthesis

D
Provides energy for the synthesis of proteins

Solution

RNA, particularly messenger RNA (mRNA), functions as a messenger in the process of protein synthesis. It carries the genetic instructions from DNA in the nucleus to the ribosomes in the cytoplasm, where proteins are synthesized.

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Re-Attempt Weekly Quiz Competition

Biology Test 314

Result

Biology Test 314

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Rank

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SHARING IS CARING

Question 1

It is used to create transgenic animals.

It allows for the amplification of small DNA samples for further analysis.

It is a method for introducing new genes into plants.

It increases the nutritional content of genetically modified foods.

Solution

Question 2

To make the crops glow in the dark for aesthetic purposes

To increase resistance to diseases, pests, and abiotic stresses

To decrease the crop's growth time significantly

To eliminate the need for sunlight in crop production

Solution

Question 3

precipitate only DNA

precipitate both DNA and RNA

precipitate only RNA

not precipitate RNA

Solution

Question 4

Acts as the primary structural component of cells

Serves as the genetic material carrying the instructions for development and functioning

Functions mainly as a catalyst in biochemical reactions

Provides energy for cellular processes

Solution

Question 5

1

2

3

4

Solution

Question 6

A nitrogenous base

A pentose sugar

A phosphate group

An amino acid

Solution

Question 7

Denaturation

Annealing

Extension

all

Question 8

Rosalind Franklin

Maurice Wilkins

James Watson and Francis Crick

Erwin Chargaff

Solution

Question 9

15 min

12 min

23 min

none

Solution

Question 10

Acts as the genetic material in most organisms

Serves as the primary structural component of ribosomes

Functions as a messenger, carrying instructions from DNA for protein synthesis

Provides energy for the synthesis of proteins

Solution

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