Molecular Biology and Genetics

Question 1

Multiple choice structure of dna and rna nucleic acids and polynucleotides nucleic acids and protein synthesis molecular biology biology

The pitch angle of deflection between two successive base pairs in DNA double helix is

$20^0$
$34^0$
$36^0$
$360^0$

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Answer

Adenine-Thymine

Answer

Methionine, phenylalanine, proline, lysine, valine, glycine

Answer

5-GGATCC-3'

3' GGTACC-5'

Answer

Substitution of adenine for cytosine

Answer

Adenine$+$ guanine

Answer

Glycoside bonds

Answer

All of these

Answer

$1$ and $2$

Answer

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

Answer

Depreciation

Question 2

Multiple choice structure of dna and rna nucleic acids and polynucleotides nucleic acids and protein synthesis molecular biology biology

Which of the following pairs are correctly matched

Thymine-Uracil
Uracil-Cytosine
Guanine-Adenine

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Question 3

Multiple choice structure of dna and rna nucleic acids and polynucleotides nucleic acids and protein synthesis molecular biology biology

A DNA double helix is 340 nm long. Number of nucleotides found in it is

20
200
1000
2000

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Question 4

Multiple choice structure of dna and rna nucleic acids and polynucleotides nucleic acids and protein synthesis molecular biology biology

In double helix of DNA, there are sugar phosphate backbones with bases projected

Outwardly
Outwardly and inwardly
Inwardly
Interpolated

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Question 5

Multiple choice structure of dna and rna nucleic acids and polynucleotides nucleic acids and protein synthesis molecular biology biology

TACAAAGGGTTTCAACCC is the sequence of nucleotides in a DNA strand. Predict the sequence of amino acids found in a protein formed from it

Proline, phenylalanine, lysine, methionine, glycine, valine
Methionine, phenylalanine, glycine, valine, lysine, proline
Valine, glycine, proline, lysine, phenylalanine, methionine

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Question 6

Multiple choice structure of dna and rna nucleic acids and polynucleotides nucleic acids and protein synthesis molecular biology biology

Identify the DNA segment which is not pallindromic

5'-GAATTC -3'

3'-CTTAAG-5'
5'-CCCGGG-3'

3'-GGGCCC-5'
5'-GCGGCCGC-3'

3-CGCCGGCG-5'

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Question 7

Multiple choice structure of dna and rna nucleic acids and polynucleotides nucleic acids and protein synthesis molecular biology biology

Which one of the following alternations in DNA is likely to be lethal?

Substitution of methyl cytosine for cytosine
Deletion of thee nucleotides
Insertion of one nucleotide

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Question 8

Multiple choice structure of dna and rna nucleic acids and polynucleotides nucleic acids and protein synthesis molecular biology biology

An increased melting temperature for duplex DNA results from a high content of _________________.

Cytosine$+$thymine
Cytosine$+$guanine
Adenine$+$ cytosine

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Question 9

Multiple choice structure of dna and rna nucleic acids and polynucleotides nucleic acids and protein synthesis molecular biology biology

The successive nucleotides of RNA are covalently linked through ______________.

Hydrogen bonds
Phosphodiester bonds
Peptide bonds

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Question 10

Multiple choice structure of dna and rna nucleic acids and polynucleotides nucleic acids and protein synthesis molecular biology biology

The double helix of DNA consists of

Phosphodiester bonds
Stacking of bases
Base pairing

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Question 11

Multiple choice structure of dna and rna nucleic acids and polynucleotides nucleic acids and protein synthesis molecular biology biology

In the case of double-stranded DNA, which of the following base ratios are always equal to one?
a. $(A+T)/(G+C)$
b. $(A+G)/(C+T)$
c. $C/G$
d. $(G+T)/(A+C)$.
Select the correct answer.

$1$ and $3$
$2, 3$ and $4$
$1, 3$ and $4$

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Question 12

Multiple choice structure of dna and rna nucleic acids and polynucleotides nucleic acids and protein synthesis molecular biology biology

In relation to double helical bacterial DNA, match list-I(Parameter) with List-II(Value) and select the correct answer using the codes given the lists.

List-I	List-II
a. Diameter of the helix	$1$. $34A'$
b. Distance between two adjacent bases	$2$. $20A'$
c. Distance between two complete turns	$3$. $3A'$
d. Length of the hydrogen bond	$4$. $3.4A'$

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

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Question 13

Multiple choice structure of dna and rna nucleic acids and polynucleotides nucleic acids and protein synthesis molecular biology biology

The number of hydrogen bonds needed to bind cytosine with guanine in a DNA stand is?

One
Two
Three
Four

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Question 14

Multiple choice structure of dna and rna nucleic acids and polynucleotides nucleic acids and protein synthesis molecular biology biology

In aqueous solution, the alcidine molecules bind to DNA by inserting themselves between adjacent base pairs. The process is called ______________.

Substitution
Mutation
Intercalation

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Question 15

Multiple choice structure of dna and rna nucleic acids and polynucleotides nucleic acids and protein synthesis molecular biology biology

Which of the following pairs is/are correctly matched?
a. E.coli - Circular DNA
b. Tobacco Single - Stranded RNA mosaic virus
c. Reo virus - Double-stranded RNA
Select the correct answer using the codes given.

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

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Molecular Biology and Genetics

Molecular Biology and Genetics Questions