Molecular Basis of Inheritance Test

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Molecular Basis of Inheritance Test - 73

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Weekly Quiz Competition

Question 1
1 / -0

Beside direct chemical analysis DNA and RNA can be detected by which of the following method?
a. Photometric procedures
b. Staining reactions
c. Enzyme digestion
Select the correct answer using the codes given.

A
$$1, 2$$ and $$3$$

B
$$1$$ and $$2$$

C
$$2$$ and $$3$$

D
$$1$$ and $$3$$
Question 2
1 / -0

Match List I with List II and select the correct answer using the codes given the lists.
List-I List-II
a. DNA structure $$1$$. N/A
b. Semi-conservative replication of DNA $$2$$. N/A
c. One gene, one enzyme theory $$3$$. N/A
d. Induction of mutation $$4$$. N/A

A
A-$$1$$, B-$$2$$, C-$$3$$, D-$$4$$

B
A-$$3$$, B-$$4$$, C-$$1$$, D-$$2$$

C
A-$$3$$, B-$$4$$, C-$$2$$, D-$$1$$

D
A-$$4$$, B-$$3$$, C-$$2$$, D-$$1$$
Question 3
1 / -0

Codon degeneracy means that

A
Several of the amino acids are coded by more than one codon.

B
One codon can code for many amino acids.

C
One amino acid can be coded by only one codon.

D
The codons are triplet nucleotide sequences.
Solution
- Codon degeneracy means that the genetic code is degenerate. It means that there is more than one codon that specifies the single amino acid.
- The phenomenon in which several of the amino acids, each coded by more than one codon is called codon degeneracy.
Thus, the correct answer is option A.
Question 4
1 / -0

Which of the following pairs of lectin source and the name of the lection are correctly matched?
a. Canacalia ensiformis-Con A
b. Abrus precatorius - Abrin
c. Dolichos biflorus - Dolin
d. Ricinus communis- Ricinin
Select the correct answer using the codes given.

A
$$1, 2$$ and $$3$$

B
$$1, 3$$ and $$4$$

C
$$1, 2$$ and $$4$$

D
$$2, 3$$ and $$4$$
Question 5
1 / -0

The state in which the viral genome gets integrated with the bacterial genome is called.

A
Prophage

B
Prophase

C
Adsorption

D
Lysogeny
Question 6
1 / -0

Which one of the following statements is incorrect for translation in the cytoplasm?

A
One codon codes for only one amino acid.

B
One amino acid may be coded by many codons.

C
More than one amino acids are coded by one specific codon.

D
There are some codons that do not code for any amino acid.

Solution

One codon codes for only one amino acid. However, the genetic code shows degeneracy of codon. It means one amino acid may be coded by more than one codon. There are four codons that do not code for any amino acids. One codon acts as start codon and three codons act as stop codons.
Thus, the correct answer is option C.
Question 7
1 / -0

According to Watson-Crick model, hydrogen bonding in a double-stranded DNA occurs between.

A
Adenine and guanine.

B
Adenine and thymine.

C
Cytosine and adenine.

D
Guanine and thymine.

Solution

According to Watson and Crick model, DNA is a double-stranded molecule in which sugar-phosphate backbones on the outside. There are purine and pyrimidine bases. Adenine and guanine are purine bases whereas cytosine and thymine are pyrimidine bases. In DNA, there are two hydrogen bonds between adenine and thymine nitrogenous bases and three hydrogen bonds between cytosine and guanine nitrogenous bases.
Thus, the correct answer is option B.
Question 8
1 / -0

Which of the following bonds are formed by action of DNA ligase?

A
Sugar-phosphate bond

B
Phosphodiester bond

C
Phosphate-phoshpate bond

D
Both (1) and (2)

Solution

The mechanism of DNA ligase is to form two covalent phosphodiester bonds between $$3'$$ hydroxyl end of one nucleotide(acceptor) with $$5'$$ phosphate end of another(donor).Two ATP molecules are consumed for each phosphodiester bond formation.
So, the correct answer is option B.
Question 9
1 / -0

The helical structure of DNA was discovered by

A
Sanger

B
Bloor

C
L.Pauling

D
Watson and Crick
Solution
- Based on the X-ray diffraction studies produced by Maurice Wilkins and Rosalind Franklin, Watson and Crick discovered the double helical structure of DNA.
- DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group, and a nitrogen base. These nucleotides are framed into two chains that coil around each other to form a double helix.
- Hence The helical structure of DNA was discovered by Watson and Crick
Question 10
1 / -0

In the double helix model of DNA as proposed by Watson and Crick, each base pair is how far from the next base pair?

A
0.034 nm

B
0.34 nm

C
3.4 nm

D
34 nm

Solution

The distance between the two base pairs of DNA is 3.4 Angstroms.
A base pair is one of the pairs A-T or C-G, that each base pair consists of a purine and a pyrimidine. The nucleotides in a base pair are complementary which means they can bond together with hydrogen bonds.
So, the correct option is '0.34 nm'

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Re-Attempt Weekly Quiz Competition

List-I	List-II
a. DNA structure	$$1$$. N/A
b. Semi-conservative replication of DNA	$$2$$. N/A
c. One gene, one enzyme theory	$$3$$. N/A
d. Induction of mutation	$$4$$. N/A

Molecular Basis of Inheritance Test - 73

Result

Molecular Basis of Inheritance Test - 73

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SHARING IS CARING

Question 1

$$1, 2$$ and $$3$$

$$1$$ and $$2$$

$$2$$ and $$3$$

$$1$$ and $$3$$

Question 2

A-$$1$$, B-$$2$$, C-$$3$$, D-$$4$$

A-$$3$$, B-$$4$$, C-$$1$$, D-$$2$$

A-$$3$$, B-$$4$$, C-$$2$$, D-$$1$$

A-$$4$$, B-$$3$$, C-$$2$$, D-$$1$$

Question 3

Several of the amino acids are coded by more than one codon.

One codon can code for many amino acids.

One amino acid can be coded by only one codon.

The codons are triplet nucleotide sequences.

Solution

Question 4

$$1, 2$$ and $$3$$

$$1, 3$$ and $$4$$

$$1, 2$$ and $$4$$

$$2, 3$$ and $$4$$

Question 5

Prophage

Prophase

Adsorption

Lysogeny

Question 6

One codon codes for only one amino acid.

One amino acid may be coded by many codons.

More than one amino acids are coded by one specific codon.

There are some codons that do not code for any amino acid.

Solution

Question 7

Adenine and guanine.

Adenine and thymine.

Cytosine and adenine.

Guanine and thymine.

Solution

Question 8

Sugar-phosphate bond

Phosphodiester bond

Phosphate-phoshpate bond

Both (1) and (2)

Solution

Question 9

Sanger

Bloor

L.Pauling

Watson and Crick

Solution

Question 10

0.034 nm

0.34 nm

3.4 nm

34 nm

Solution

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