Multiple choice

Match the functions of the enzymes involved in DNA replication and choose the correct option from the alternatives given below.

 
ENZYME FUNCTION
A. DNA Polymerase III I. Stabilisation of the single stranded DNA strand
B. Helicase II. Nicks and cuts the backbone and relieves the tension of unzipped strand
C. Topoisomerase III. Synthesises new strand from RNA primer
D. DNA Polymerase I IV. Joins the backbone of newly synthesised strand
E. RNA Polymerase V. Unzipping DNA double strand
F. SSBP VI. Replaces RNA with DNA
G. DNA Ligase VII. Lays down the RNA primer

  1. A - VI, B - V, C - I, D - III, E - VII, F - II, G - IV

  2. A - III, B - V, C - II, D - VI, E - VII, F - I, G - IV

  3. A - VII, B - V, C - II, D - VI, E - III, F - I, G - IV

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Topoisomerases demarkate the cuts by nicking the phosphates in the backbone. Only DNA polymerase I has the ability to replace RNA with DNA. SSBP are single stranded binding proteins that stablise the tension of single strandedness.

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