Text Book Back Questions and Answers - Chapter 6 Cell The Unit of Life 11th Biology Botany Guide Samacheer Kalvi Solutions - SaraNextGen [2024-2025]

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On April 24, 2024, 11:35 AM

Cell: The Unit of Life
Text Book Back Questions and Answers
I. Multiple Choice Questions
Choose the correct answer
Question 1.
The two subunits of ribosomes remain united at critical ion level of
(a) Magnesium
(b) Calcium
(c) Sodium
(d) Ferrous
Answer:
(a) Magnesium
Question 2.
Sequences of which of the following is used to know the phylogeny?
(a) mRNA
(b) rRNA
(c) tRNA
(d) Hn RNA
Answer:
(b) rRNA
Question 3.
Many cells function properly and divide mitotically even though they do not have
(a) Plasma membrane
(b) Cytoskeleton
(c) Mitochondria
(d) Plastids
Answer:
(d) Plastids

Question 4.
Keeping in view the fluid mosaic model for the structure of cell membrane,
which one of the following statements is correct with respect to the movement of lipids and proteins from one lipid monolayer to the other.
(a) Neither lipid nor proteins can flip - flop
(b) Both lipid and proteins can flip - flop
(c) While lipids can rarely flip - flop proteins cannot
(d) While proteins can flip - flop lipids cannot
Answer:
(c) While lipids can rarely flip - flop proteins cannot
Question 5.
Match the columns and identify the correct option:

Answer:
(c) iii, iv, i, ii.
Question 6.
Bring out the significance of phase contrast microscopy.
Answer:
Phase contrast microscope is used to observe living cells, tissues and the cells cultured invitro during mitosis.
Question 7.
State the protoplasm theory.
Answer:
Protoplasm theory was proposed by Max Schultze which states that the protoplasm is the living content of cell and is a complex colloidal system.
Question 8.
Distinguish between prokaryotes and eukaryotes.
Answer:
Between prokaryotes and eukaryotes:

Question 9.
Difference between plant and animal ceil.
Answer:

Question 10.
Draw the ultra structure of Plant Cell.
Answer:
The ultra structure of Plant Cell: