CBSE 11th Standard Biology Subject Cell -The Unit of Life Ncert Exemplar 1 Marks Questions 2021
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CBSE 11th Standard Biology Subject Cell -The Unit of Life Ncert Exemplar 1 Marks Questions 2021
11th Standard CBSE
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Reg.No. :
Biology
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Mension a single membrane bound organelle, which is rich in hydrolytic enzymes.
(a)Lysosome.
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What is the significance of vacuole in a plant cell?
(a)The vaculole in a plant cell helps to maintain osmotic pressure for turgitity and osmosis. It also stores useful as well as waste substance.
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What does'S' refer to, in 70 Sand 80 S ribosomes?
(a)'S' or Svedberg unit, refers to the sedimentation coefficient.
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Name two type of cells which lack a nucleus.
(a)RBCs of humans and sieve cells of vascular plants.
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What is the feature of a metacentric chromosome?
(a)The metacentric chromosome has the centromere near the centre forming two equal arms and thus, appears V-shaped.
1 Marks
