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Mesosomes are the infoldings of the cell membrane, which:

(i) Are present in both prokaryotic and eukaryotic cells.
(ii) Help in cell wall formation, DNA replication and respiration.
(iii) Increase the surface area of the plasma membrane.

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Important Questions on Cell: The Unit of Life

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 8 - Cell: The Unit of Life>MCQS CORNER>Q 17
Which of the following is enveloped by a nuclear membrane?
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 8 - Cell: The Unit of Life>MCQS CORNER>Q 18
If you remove the fimbriae from the bacterial cell, which of the following would you expect to happen?
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 8 - Cell: The Unit of Life>MCQS CORNER>Q 19
The type of ribosomes found in prokaryotes is
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 8 - Cell: The Unit of Life>MCQS CORNER>Q 20
Which of these is not correct regarding ribosomes?
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 8 - Cell: The Unit of Life>MCQS CORNER>Q 21
Polyribosomes are aggregation of
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 8 - Cell: The Unit of Life>MCQS CORNER>Q 22
Plant cells differ from animal cells in having
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 8 - Cell: The Unit of Life>MCQS CORNER>Q 23

Identify the parts labelled as A, B, C and D in the given ultrastructure of a plant cell and select the correct option.

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 8 - Cell: The Unit of Life>MCQS CORNER>Q 24
Given is the ultrastructure of an animal cell. Identify the parts marked as A, B, C and D .
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