12. Discuss with your teacher and find out how to distinguish between:

(a) Plasmid DNA and Chromosomal DNA?

(b) RNA and DNA

(c) Exonuclease and endonuclease

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Solution

$\begin{matrix} S . N & P l a s m i d D N A & C h r o m o s o m a l D N A 1. & A c i r c u l a r e x t r a c h r o m o s o m a l D N A . & G e n e r a l l y l i n e a r . 2. & N o t a s s o c i a t e d w i t h h i s t o n e p r o t e i n s . & A s s o c i a t e d w i t h h i s t o n e p r o t e i n s . 3. & C o n t a i n s v e r y f e w g e n e s b u t m a y n o t & C o n s i s t s o f c o m p l e t e g e n o m e b e n e c e s s a r y f o r t h e c e l l & v i t a l f o r t h e c e l l u l a r f u n c t i o n s . 4. & s m a l l e r i n s i z e . & l a r g e r i n s i z e . \end{matrix}$

$\begin{matrix} S . N . & D N A & R N A 1. & D o u b l e s t r a n d e d n u c l e i c a c i d . & I s s i n g l e s t r a n d e d n u c l e i c a c i d s . 2. & H a s d e o x y r i b o s e s u g a r c o m p o n e n t . & H a s r i b o s e s u g a r c o m p o n e n t . 3. & H a s f o u r n u c l e o t i d e s t h a t a c t a s i t s & H a s u r a c i l i n s t e a d o f t h y m i n e a l o n g b u i l d i n g b l o c k s - a d e n i n e, g u a n i n e, & w i t h a d e n i n e, g u a n i n e a n d c y t o s i n e . c y t o s i n e a n d t h y m i n e . F u n c t i o n i t h a s g e n e t i c i n f o r m a t i o n & F u n c t i o n i t h a s i n f o r m a t i o n c o d e d e n c o d e d i n i t s b a s e s e q u e n c e . & f o r b u i l d i n g p r o t e i n s . \end{matrix}$

$\begin{matrix} S . N . & E x o n u c l e a s e s & E n d o n u c l e a s e s 1. & r e m o v e n u c l e o t i d e s f r o m t h e o u t e r & M a k e c u t s a t s p e c i f i c p o s i t i o n s e n d s o f t h e D N A . & w i t h i n t h e D N A . \end{matrix}$

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Question 3
Chromosomes are made up of

(a) DNA
(b) Protein
(c) DNA and proteins
(d) RNA

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