Match the following columns.
$\begin{matrix} C o l u m n I & C o l u m n I I A . T o p o i s o m e r a s e & 1. R e l a x e s t h e D N A f r o m i t s s u p e r - c o i l e d n a t u r e . B . D N A g y r a s e & 2. R e l i e v e s s t r a i n o f u n w i n d i n g b y D N A h e l i c a s e; t h i s i s a s p e c i f i c t y p e o f t o p o i s o m e r a s e C . D N A l i g a s e & 3. R e - a n n e a l s t h e s e m i c o n s e r v a t i v e s t r a n d s a n d j o i n s O k a z a k i f r a g m e n t s o f t h e l a g g i n g s t r a n d . D . P r i m a s e & 4. P r o v i d e s a s t a r t i n g p o i n t o f R N A (o r D N A) f o r D N A p o l y m e r a s e t o b e g i n s y n t h e s i s o f t h e n e w D N A s t r a n d . E . T e l o m e r a s e & 5. L e n g t h e n s t e l o m e r i c D N A b y a d d i n g r e p e t i t i v e n u c l e o t i d e s e q u e n c e s t o t h e e n d s o f e u k a r y o t i c c h r o m o s o m e s . \end{matrix}$

A B C D E
1 2 5 4 3

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A B C D E
1 2 3 5 4

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A B C D E
5 4 3 2 1

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A B C D E
1 2 3 4 5

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Solution

The correct option is D A B C D E
1 2 3 4 5
Topoisomerase $\to$ Relaxes the DNA from its super-coiled nature.
DNA gyrase $\to$ Relieves strain of unwinding by DNA helicase; this is a specific type of topoisomerase
DNA ligase $\to$ Re-anneals the semiconservative strands and joins Okazaki fragments of the lagging strand.
Primase $\to$ Provides a starting point of RNA (or DNA) for DNA polymerase to begin synthesis of the new DNA strand.
Telomerase $\to$ Lengthens telomeric DNA by adding repetitive nucleotide sequences to the ends of eukaryotic chromosomes.

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Similar questions

Match the following enzymes of DNA replication with their respective functions:
$\begin{matrix} p . D N A p o l y m e r a s e & i . H e l p s u n z i p t h e D N A d o u b l e h e l i x q . D N A l i g a s e & i i . S e a l s n i c k s b e t w e e n O k a z a k i f r a g m e n t s r . D N A h e l i c a s e & i i i . L a y s R N A p r i m e r s t o w h i c h p o l y m e r a s e c a n a d d n u c l e o t i d e s s . P r i m a s e & i v . A d d s n u c l e o t i d e s t o t h e f r e e 3^{'} e n d o f R N A p r i m e r s \end{matrix}$

Q. Match the following

\begin{matrix} C o l u m n I & C o l u m n I I (A) H e l i c a s e & (M) a c t i v a t i o n o f a m i n o a c i d (B) P e p t i d y l t r a n s f e r a s e & (N) j o i n s D N A f r a g m e n t s (C) D N A p o l y m e r a s e & (O) u n w i n d s D N A h e l i x (D) D N A l i g a s e & (P) p e p t i d e b o n d s b e t w e e n a m i n o a c i d s (E) A m i n o a c y l s y n t h e t a s e e n z y m e & (Q) D N A s y n t h e s i s (F) R N A p r i m a s e & (R) s y n t h e s i s o f R N A p r i m e r \end{matrix}

Q. Match the following enzymes of DNA replication with their respective functions:

\begin{matrix} Column I & Column II p. DNA polymerase & i. Helps unzip the DNA double helix q. DNA ligase & ii. Seals nicks between Okazaki fragments r. DNA helicase & iii. Lays RNA primers to which polymerase can add nucleotides s. Primase & iv. Adds nucleotides to the free 3' end of RNA primers \end{matrix}

Q. Pick the correct match.

A. Helicase	(i) To join nucleotides on DNA
B. Gyrase	(ii) To open DNA
C. Primase	(iii) Unwind DNA
D. DNA polymerase III	(iv) For RNA printing

Q. Which of the following would be required for the synthesis of rDNA?
(I) Restriction endonuclease
(II) DNA fragments
(III) DNA ligase
(IV) DNA helicase

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