19. The main difference between chlorophyll ‘a’ and ‘b’ is
(a) Chlorophyll ‘a‘ is linear chain compound and ‘b‘ is branched chain
(b) Chlrophyll ‘a‘ has no Mg+ ion in centre of molecule
(c) In chlorophyll ‘a‘ there is CH3 group whereas in ‘b‘ it is –CHO group
(d) All of the above
Ans (c) RER has ribosome on which protein synthesis occurs.
(19)