Biology

Molecular Biology and Genetics

985 Questions

Molecular biology and genetics explore the structure and function of DNA, RNA, genetic mutations, and heredity. Understanding these building blocks of life is essential for most biology examinations. Review these practice questions to test your molecular genetics knowledge.

DNA structure and basesGenetic mutationsNucleic acids compositionDNA sequencing and replication

Molecular Biology and Genetics Questions

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

The two strands of DNA are?

Similar in nature and complementary
Anti parallel and complementary
Parallel and complementary
Basically different in nature

Reveal answer Fill a bubble to check yourself

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

In a given $100$ bp DNA segment the number of nucleotide of guanine is $20$. The total number of hydrogen bonds stabilizing this double helix are?

$130$
$120$
$220$
$300$

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

On which strand of DNA, m-RNA is constructed?

Trand oriented as $5' \rightarrow 3'$
Strand oriented as $3' \rightarrow 5'$
Both the strands
Any one strand

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

Molecule of ATP is structurally similar to the molecule of

DNA
RNA
protein
AMP

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

Length of one coil of B-DNA helix is

0.34 nm
3.4 nm
10nm
20nm

Reveal answer Fill a bubble to check yourself

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

Double stranded DNA virus with 20,000 base pairs has nucleotides

20,000
10,000
666
40,000

Reveal answer Fill a bubble to check yourself

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

Coded information in nucleic acid depends upon

Arrangement of nucleotides
Position of nucleotides
Number of nucleotides
All the above

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

Nucleotide pairs present in one turn of DNA helix

4
8
10
9

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

The codon for anticodon 3' UUUA-5' is

5' AAAU-3'
5' UAAA-3
3 UAAD-5
3' AAAU-5

Reveal answer Fill a bubble to check yourself

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

DNA duplex shows

Right handed coiling and parallel
Right handed coiling and antiparallel
Left handed coiling and antiparallel
Left handed coiling and parallel

Reveal answer Fill a bubble to check yourself

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

DNA strands have

Quaternary structure
Same polarity
Antiparallel polarity
Disulphide bond

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

Chargaffs rules are applicable to

Single stranded RNA
Single stranded DNA and RNA
Single stranded DNA
Double stranded DNA

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

DNA contains nucleobases, sugar and phosphate. Removal of which among these will not affect length of DNA

Nucleobases
Phosphate
Sugar
None of the above

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

DNA double helix is

Complementary and parallel
Complementary and antiparallel
Without super coils
Always circular

Reveal answer Fill a bubble to check yourself

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

Which is an example of highly repetitive DNA?

Alu elements
Histone gene cluster
Dispersed repetitive DNA
DNA minisatellite

Reveal answer Fill a bubble to check yourself

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