HARD
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Keeping in view the fluid mosaic model for the structure of cell membrane, which one of the following statement is correct with respect to the movement of lipids and proteins from one lipid monolayer to the other.

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Important Questions on Cell : The Unit of Life

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Biology>Cell : Structure and Functions>Cell : The Unit of Life>Eukaryotic Cell
The region of chromatin that is stained lightly is
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>Eukaryotic Cell
Water-soluble pigments found in plant cell vacuoles are:
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>Eukaryotic Cell
The shorter and longer arms of a submetacentric chromosome are referred to as:
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>Eukaryotic Cell
Microtubules are the constituents of:
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>Eukaryotic Cell
The structures that are formed by stacking of organized flattened membranous sacs in the chloroplasts are:
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>Eukaryotic Cell
The solid linear cytoskeletal elements having a diameter of 7 nm and made up of a single type of monomer are known as:
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>Eukaryotic Cell
Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>Eukaryotic Cell
Cellular organelles with membranes are:
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>Eukaryotic Cell
The chromosomes in which centromere is situated close to one end are:
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>Eukaryotic Cell
DNA is not present in:
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>Eukaryotic Cell

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?

EASY
Biology>Cell : Structure and Functions>Cell : The Unit of Life>Eukaryotic Cell
Which of the following are not membrane-bound?
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>Eukaryotic Cell
Which one of the following cell organelles are enclosed by a single membrane?
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>Eukaryotic Cell
Which of the following statements is not correct?
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>Eukaryotic Cell
A protoplast is a cell:
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>Eukaryotic Cell
Nuclear envelope is a derivative of:
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>Eukaryotic Cell
Balbiani rings are sites of:
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>Eukaryotic Cell
A cell organelle containing hydrolytic enzymes is:
MEDIUM
Biology>Cell : Structure and Functions>Cell : The Unit of Life>Eukaryotic Cell
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 : Structure and Functions>Cell : The Unit of Life>Eukaryotic Cell
In a chloroplast the highest number of protons are found in: