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What does 'S' refers in 70S and 80S ribosomes?

Important Questions on Cell : The Unit of Life

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Biology>Cell : Structure and Functions>Cell : The Unit of Life>The Cell- An overview
Match the following organelles in Group I with the structures in Group II. Choose the correct combination.

Group I Group II
P. Mitochondrion i. Cisternae
Q. Golgi ii. Cristae
R. Chloroplast iii. Thylakoids
S. Centrosome iv. Radial spokes
EASY
Biology>Cell : Structure and Functions>Cell : The Unit of Life>The Cell- An overview
A line is drawn from the exterior of an animal cell to the centre of the nucleus, crossing through one mitochondrion. What is the minimum number of membrane bilayers that the line will cross?
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>The Cell- An overview
The concept of “Omnis cellula-e cellula” regarding cell division was first proposed by:
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>The Cell- An overview
The size of Pleuropneumonia-like Organism (PPLO) is:
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>The Cell- An overview
Plant cells do not burst in distilled water, because
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>The Cell- An overview
Which of the following represents the incorrect pair?
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>The Cell- An overview

Match the following columns:

  Column I Column II
A Mycoplasma (i) Longest cell
B Human RBC

(ii) 7μm  in diameter
C Nerve cells (iii) 10 - 20 μm
D A typical eukaryotic cell (iv) 0.3 μm in length
    (v) Largest isolated single cell
EASY
Biology>Cell : Structure and Functions>Cell : The Unit of Life>The Cell- An overview
Which of the following is considered as the sugar factory of the cell?
EASY
Biology>Cell : Structure and Functions>Cell : The Unit of Life>The Cell- An overview
Name the two main constituents of the plasma membrane and show how they are arranged by means of a diagram.
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>The Cell- An overview

Plants which contain centrioles in their cells are?

 

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Biology>Cell : Structure and Functions>Cell : The Unit of Life>The Cell- An overview
Plant and animal cells, both have
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>The Cell- An overview
Choose the incorrect option:
EASY
Biology>Cell : Structure and Functions>Cell : The Unit of Life>The Cell- An overview
Which one of the following pairs is not correctly matched?
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>The Cell- An overview
Two animal cells are interconnected by
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>The Cell- An overview
The largest isolated single cell is
MEDIUM
Biology>Cell : Structure and Functions>Cell : The Unit of Life>The Cell- An overview
Photosynthetic pigments are located on the
EASY
Biology>Cell : Structure and Functions>Cell : The Unit of Life>The Cell- An overview
Arrange the following cells in the ascending order of their size and select the correct option.
I. Ostrich eggs II. Mycoplasma
III. Bacteria IV. Human RBCs
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Biology>Cell : Structure and Functions>Cell : The Unit of Life>The Cell- An overview
Which of the following are properties of reserved cells?
EASY
Biology>Cell : Structure and Functions>Cell : The Unit of Life>The Cell- An overview
Generally the smaller the cell, 
MEDIUM
Biology>Cell : Structure and Functions>Cell : The Unit of Life>The Cell- An overview
The correct order of sedimentation of subcellular structures during differential centrifugation is: