Tag: biology

Questions Related to biology

Molecule of ATP is structurally similar to the molecule of

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

  1. DNA

  2. RNA

  3. protein

  4. AMP

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Correct Option: B

Enzyme required during DNA replication is

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

  1. DNA polymerase

  2. DNA ligase

  3. Both A and B

  4. Sigma factor

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Correct Option: C

Length of one coil of B-DNA helix is 

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

  1. 0.34 nm

  2. 3.4 nm

  3. 10nm

  4. 20nm

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Correct Option: B

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

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

  1. 20,000

  2. 10,000

  3. 666

  4. 40,000

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Correct Option: D

Hargobind Khorana is known for

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

  1. Discovery of DNA

  2. Discovery of DNA ligase

  3. Discovery of tRNA

  4. Synthesis of proteins

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Correct Option: B

Coded information in nucleic acid depends upon

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

  1. Arrangement of nucleotides

  2. Position of nucleotides

  3. Number of nucleotides

  4. All the above

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Correct Option: A

Special unwinding enzyme that breaks hydrogen bonds between the two strands of DNA is

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

  1. Primase

  2. Topoisomerase

  3. DNA polymerase

  4. Helicase

  5. DNA ligase

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Correct Option: D

Nucleotide pairs present in one turn of DNA helix

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

  1. 4

  2. 8

  3. 10

  4. 9

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Correct Option: C

Select correct/incorrect functions
1.Ligase - joins short DNA segments
2.DNA Polymerase - Cuts DNA at specific sites
3.Helicase-Breaks H-bonds between complementary DNA strands

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

  1. 1, 2 and 3 correct

  2. 1 correct, 2 and 3 false

  3. 1 and 3 correct, 2 false

  4. 1 and 2 correct, 3 false

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Correct Option: C

The codon for anticodon 3' UUUA-5' is

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

  1. 5' AAAU-3'

  2. 5' UAAA-3

  3. 3 UAAD-5

  4. 3' AAAU-5

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Correct Option: A