Case Study and Passage Based Questions for Class 9 Science Chapter 5 The Fundamental Unit of Life

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Case Study/Passage Based Questions:

Question 1:

Study the given diagram of bacterial cell and answer any four questions from (i) to (v).

(i) Label the parts marked 1, 2, and 3.
(a) 1- Nucleus, 2-Cell wall, 3- Plasma membrane.
(b) 1-Cell wall, 2- Nucleoid, 3- Plasma membrane.
(c) 1- Cytoplasm ,2- Nucleus, 3- Cell wall.
(d) 1- Nucleus, 2-Cytoplasm, 3- Cell wall.

Answer Answer: (b) 1-Cell wall, 2- Nucleoid, 3- Plasma membrane.

(ii) Which structure present in the region 2 of a living cell bear genes?
(a) Chromosome
(b) Plasma membrane
(c) Cytoplasm
(d) Cell wall

Answer Answer: (a) Chromosome

(iii) How nuclear region of a bacterial cell and nuclear region of an animal cell is different from each other?
(a) Nuclear region of bacterial cell is well defined but lacks any covering while nuclear region of an animal cell is poorly defined and membrane bound.
(b) Nuclear region of bacterial cell is poorly defined and has a covering while nuclear region of an animal cell is poorly defined and membrane bound.
(c) Nuclear region of bacterial cell is poorly defined and lacks any covering while nuclear region of an animal cell is well defined and membrane bound.
(d) Nuclear region of bacterial cell is poorly defined and lack any covering while nuclear region of an animal cell is well defined and membrane bound.

Answer Answer: (c) Nuclear region of bacterial cell is poorly defined and lack any covering while nuclear region of an animal cell is well defined and membrane bound.

(iv) Which of the following statement is correct?
(a) A single cell cannot perform all the life processes independently.
(b) A single cell can perform all the life processes independently.
(c) A single bacterial cell always needs another cell to carry out the life processes.
(d) A bacterium is a multicellular organism.

Answer Answer: (b) A single cell can perform all the life processes independently.

(v) An example of single celled organism is :
(a) Bird
(b) Fish
(c) Snake
(d) Amoeba

Answer Answer: (d) Amoeba

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