Molecular Basis of Inheritance Test

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Molecular Basis of Inheritance Test - 79

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Question 1
1 / -0

If a triplet on template DNA is AAA, what will be the anticodon on tRNA

A
UUU

B
AAA

C
TTT

D
AUG
Solution
Correct option: B

Explanation:
The template strand of DNA has AAA sequence, which will be transcribed to mRNA as UUU. Then. the anticodon on tRNA to this mRNA would have AAA sequence.
Thus, the correct answer is 'AAA'. Option B is correct.
Question 2
1 / -0

Sequencing of genomic DNA is included under

A
Structural genomics

B
Functional genomics

C
Proteomics

D
Transgenesis

Solution

Structural genomics refers to the process of studying and characterizing the genes in the genome of organisms. It involves sequencing of genomic DNA because the nucleotides are studied and arranged in order as they appear in DNA. Functional genomics refers to the use of the information gathered in structural genomics such as gene therapy.
Hence, the correct answer is 'Structural genomics'.
Question 3
1 / -0

By using only one of the two strands of DNA, mRNA is produced this process is called as _____

A
Transcription

B
Translation

C
Translocation

D
Replacement

Solution

Transcription is the process by which the information in a strand of DNA is copied into a new molecule of messenger RNA.
So, the correct option is, 'Transcription'.
Question 4
1 / -0

DNA replication in bacterial occurs:

A
During S Phase

B
Within nucleolus

C
Prior to fission

D
Just before transcription

Solution

In bacteria, replication of DNA occurs prior to fission'
So, the correct option is 'Prior to fission'.
Question 5
1 / -0

Which of the following act as the substrate and provide the energy for DNA replication?

A
Deoxyribonucleoside triphosphates

B
Ribonucleoside triphosphates

C
Dideoxy Ribonucleotide triphosphates

D
Ribonucleotide triphosphates

Solution

Formation of new DNA molecule from a parent DNA molecule is called DNA replication. It occurs in cytoplasm in prokaryotes and nucleus in eukaryotes. During replication, energy rich deoxyribonucleoside triphosphates are the source of energy, in the formation of new DNA molecule.
So, the correct option is ‘Dexoyribonucleoside triphosphates’.
Question 6
1 / -0

The ratio of $$H_1$$ and $$H_3$$ proteins in chromatin is

A
$$1:2$$

B
$$2:1$$

C
$$1:1$$

D
$$1:4$$

Solution

The chromatin structure of DNA is formed by folding or wraping of DNA around the nucleosome
The nucleosome is made up of an octamer of 4 histone proteins in dimeric condition
So, $$H_3$$ protein which also forms the nucleosome exists in dimeric state or two units
For every nucleosome there exists only one $$H_1$$ protein present on the exterior clamping the nucleosome structure
Therefore, the ratio of $$H_1$$ to $$H_3$$ is 1:2
So, the correct answer is '1:2'
Question 7
1 / -0

Which enzyme polymerizes RNA with defined sequence in a template independent manner?

A
Peptidyl transferase

B
RNA Polymerase

C
Reverse transcription

D
Polynucleotide phosphorylase

Solution

Polynucleotide phosphorylase polymerizes RNA with defined sequence in a template independent manner. PNPase is a bifunctional enzyme with a phosphorolytic 3' to 5' exoribonuclease activity and a 3'-terminal oligonucleotide polymerase activity.
So, the correct option is 'Polynucleotide phosphorylase'.
Question 8
1 / -0

Read the statements given below.

I. Thiamine and Uracil are pyrimidines found in DNA & RNA respectively.
II. Number of base pairs per turn in B - DNA helix is 10.

Choose the correct option.

A
Both statements I & II are correct

B
Only statement II is correct

C
Both statement I & II are incorrect

D
Only statement I is correct.
Solution
- Thymine and uracil are pyrimidines (nitrogenous bases) found in DNA & RNA respectively.
- It is a characteristic feature of both these nucleic acids. On the other hand, B-DNA, the most common double-helical structure found in nature, has a double helix which is right-handed with about 10–10.5 base pairs per turn.
So, the correct option is 'both the statements I & II are correct'.
Question 9
1 / -0

DNA replication in bacterial occurs?

A
During S phase

B
Within nucleolus

C
Prior to fission

D
Just before transcription

Solution

Initiation at each origin produces two divergent DNA replication forks along the chromosome to create a replicon that is duplicated only once per cell division. Replication initiation in bacteria and eukaryotes.
So. the correct option is 'During S phase'.
Question 10
1 / -0

No. of of phosphoester bonds found in one turn of DNA is ____________.

A
$$18$$

B
$$10$$

C
$$40$$

D
$$38$$

Solution

There are 10 base pair in one turn of DNA and two phosphodiester bonds are present between two adjacent base pairs,therefore there must be 9 phosphodiester bonds in one side of the 10 base pair and 9 phosphodiester bond on the other side.so the total number of phosphodiester bonds found in one turn of DNA is 18. so, 'the correct option is 18'.

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Molecular Basis of Inheritance Test - 79

Result

Molecular Basis of Inheritance Test - 79

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SHARING IS CARING

Question 1

UUU

AAA

TTT

AUG

Solution

Question 2

Structural genomics

Functional genomics

Proteomics

Transgenesis

Solution

Question 3

Transcription

Translation

Translocation

Replacement

Solution

Question 4

During S Phase

Within nucleolus

Prior to fission

Just before transcription

Solution

Question 5

Deoxyribonucleoside triphosphates

Ribonucleoside triphosphates

Dideoxy Ribonucleotide triphosphates

Ribonucleotide triphosphates

Solution

Question 6

$$1:2$$

$$2:1$$

$$1:1$$

$$1:4$$

Solution

Question 7

Peptidyl transferase

RNA Polymerase

Reverse transcription

Polynucleotide phosphorylase

Solution

Question 8

Both statements I & II are correct

Only statement II is correct

Both statement I & II are incorrect

Only statement I is correct.

Solution

Question 9

During S phase

Within nucleolus

Prior to fission

Just before transcription

Solution

Question 10

$$18$$

$$10$$

$$40$$

$$38$$

Solution

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