Tag: nucleic acids and protein synthesis

Questions Related to nucleic acids and protein synthesis

DNA polymerase enzyme is required for the synthesis of 

dna replication replication and protein synthesis nucleic acids and protein synthesis heredity biology

  1. RNA from DNA

  2. DNA from DNA

  3. RNA from RNA

  4. DNA from RNA

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Correct Option: B
Explanation:

DNA polymerase is an enzyme that synthesizes DNA molecules from deoxynucleotides, the building blocks of DNA. It helps in DNA replication (DNA dependent DNA synthesis). This enzyme works in pairs to create two complementary DNA strands from a single original DNA molecule.

RNA from DNA (transcription) is synthesized by RNA polymerase.
DNA from RNA is synthesized by reverse transcriptase enzyme in some viruses.
So, the correct option is 'DNA from DNA'.

The area of unwinding and separation of DNA strands during replication is called

dna replication replication and protein synthesis nucleic acids and protein synthesis heredity biology

  1. Origin

  2. Initiation point

  3. Primer

  4. Replication fork

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Correct Option: A

The enzyme which can cut molecules of DNA into segments is known as

dna replication replication and protein synthesis nucleic acids and protein synthesis heredity biology

  1. DNA polymerase

  2. DNA ligase

  3. Restriction enzyme

  4. DNA gyrase

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Correct Option: C
Explanation:
Restriction enzymes are nick named as 'molecular scissors' due to their ability to cut DNA fragments. Thus, restriction enzymes are of great use in genetic engineering for restricting desired genes for incorporation
So, the correct answer is 'Restriction enzyme'

Usual method of DNA replication is

dna replication replication and protein synthesis nucleic acids and protein synthesis heredity biology

  1. Semiconservative

  2. Conservative

  3. Dispersive

  4. Nonconservative

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Correct Option: A

DNA replication occurs in 5' 3' direction because 

dna replication replication and protein synthesis nucleic acids and protein synthesis heredity biology

  1. DNA polymerase III can polymerise nucleotides in 5 3 direction

  2. DNA polymerase I carries out editing

  3. DNA polymerase I carries out polymerisation

  4. DNA polymerase II can link up only in 5 3 direction

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Correct Option: A

Experimental material in the study of DNA replication has been

dna replication replication and protein synthesis nucleic acids and protein synthesis heredity biology

  1. Escherichia coli

  2. Neurospora crassa

  3. Pneumococcus

  4. Drosophila melanogaster

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Correct Option: A

Enzyme required for removing RNA primer during DNA replication is ______________.

dna replication replication and protein synthesis nucleic acids and protein synthesis heredity biology

  1. Primase

  2. DNA polymerase I

  3. DNA polymerase III

  4. Ligase

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Correct Option: B

Which one is involved in DNA repair ?

dna replication replication and protein synthesis nucleic acids and protein synthesis heredity biology

  1. Ligase

  2. Primase

  3. DNA polymerase III

  4. DNA polymerase I

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Correct Option: D

DNA replication is

dna replication replication and protein synthesis nucleic acids and protein synthesis heredity biology

  1. Conservative and discontinuous

  2. Semiconservative and semidiscontinuous

  3. Semiconservative and discontinuous

  4. Conservative

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Correct Option: B

New strand formation on a DNA template can be initiated only by ________________.

dna replication replication and protein synthesis nucleic acids and protein synthesis heredity biology

  1. DNA polymerase I

  2. DNA polymerase III

  3. RNA primer

  4. DNA primer

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Correct Option: C