Define polycentric chromosome.

Important Questions on Cell: The Unit of Life

EASY

Biology>Cell Biology and Biomolecules>Cell: The Unit of Life>Nucleus and Chromosome

Cellular organelles with membranes are:

EASY

Biology>Cell Biology and Biomolecules>Cell: The Unit of Life>Nucleus and Chromosome

A protoplast is a cell:

MEDIUM

Biology>Cell Biology and Biomolecules>Cell: The Unit of Life>Nucleus and Chromosome

Match the columns and identify the correct option.

	Column I		Column II
A	Thylakoids	(i)	Disc-shaped sacs in Golgi apparatus
B	Cristae	(ii)	Condensed structure of DNA
C	Cisternae	(iii)	Flat membranous sacs in stroma
D	Chromatin	(iv)	Infoldings in mitochondria

EASY

Biology>Cell Biology and Biomolecules>Cell: The Unit of Life>Nucleus and Chromosome

The structures that are formed by stacking of organized flattened membranous sacs in the chloroplasts are:

MEDIUM

Biology>Cell Biology and Biomolecules>Cell: The Unit of Life>Nucleus and Chromosome

Mitochondria and chloroplast are:

(i) Semi - autonomous organelles

(ii) Formed by the division of pre-existing organelles and they contain DNA but lack protein synthesizing machinery

Which one of the following option is correct?

HARD

Biology>Cell Biology and Biomolecules>Cell: The Unit of Life>Nucleus and Chromosome

Nuclear envelope is a derivative of:

EASY

Biology>Cell Biology and Biomolecules>Cell: The Unit of Life>Nucleus and Chromosome

Which of the following are not membrane-bound?

EASY

Biology>Cell Biology and Biomolecules>Cell: The Unit of Life>Nucleus and Chromosome

A cell organelle containing hydrolytic enzymes is:

EASY

Biology>Cell Biology and Biomolecules>Cell: The Unit of Life>Nucleus and Chromosome

In a chloroplast the highest number of protons are found in: