CBSE Class 9 Biology Practical Skills MCQs Set A

Question: The shape of nucleus in a plant cell is-

a) Elliptical

b) Rectangular

c) Triangular

d) Round

Answer: Elliptical

Question: Definite shape of cell is seen in case of-

a) Plant cells

b) Animal cell

c) Both animal and plant cells

d) Neither animal nor plant cells

Answer: Plant cells

Question: Given below four operations for preparing a temporary mount of human cheek cells-

(i) taking scraping from inner side of cheek and spreading it on a clean slide.

(ii) putting a drop of glycerine on the material.

(iii) adding 2-3 drops of methylene blue.

(iv) rinsing the mouth with fresh water and disinfectant solution.

a) iv i iii ii

b) i ii iii iv

c) iv i ii iii

d) i iii ii iv

Answer: iv i iii ii

Question: The less stained central part of onion peel cell is

a) Cytoplasm

b) Nucleus

c) Vacuole

d) Cell wall

Answer: Cytoplasm

Question: Glycerine is used to prepare a temporary mount of a tissue due to the following reason

a) To avoid drying up of the specimen quickly

b) To avoid entry of air bubbles

c) To colour the specimen

d) None of the options

Answer: To avoid drying up of the specimen quickly

Question: Magnifying power of a microscope is calculated by

a) Multiplying the power of objective lens and eye piece

b) Adding up the power of objective lens and eye piece

c) Subtracting the power of objective lens from that of eye piece.

d) Multiplying the power of objective lens with the distance between the objective lens and the specimen

Answer: Multiplying the power of objective lens and eye piece

Question: human cheek cell stained in methylene blue and mounted in glycerine were observed under a compound microscope. The components of cell which would be seen are

a) plasma membrane, cytoplasm, nucleus

b) Cell wall, cytoplasm, nucleus

c) Plasma membrane, cytoplasm, nucleus, mitochondria

d) Plasma membrane, nucleus, mitochondria lysosomes

Answer: plasma membrane, cytoplasm, nucleus

Question: Cells are stained to

a) Highlight the cell organelles

b) Nourish the cell

c) Make the cell turgid

d) Help in cell multiplication

Answer: Highlight the cell organelles

Question: The cellular component not seen under a compound microscope while observing onion peel

a) Chromosome

b) Cell wall

c) Nucleus

d) Cytoplasm

Answer: Chromosome

Question: Which one of the following is the correct sequence for preparing a mount of onion peel

a) (i) take out onion peel (ii) keep the peel in water in a petridish (iii) add a few drops of safranin stain and transfer to a slide (iv) add a drop of glycerine (v) cover it up with a coverslip

b) (i) take out onion peel (ii) keep the peel on the slide (iii) add a few drop of glycerine on it (iv) add few drops of safranin stain (v) cover it up with a coverslip

c) (i) take out onion peel (ii) Keep it on a slide and add safranin stain (iii) transfer it to water in a petridish (iv) remove water and add glycerine (v) cover it up with a coverslip

d) (i) take out onion peel (ii) cover it up with a coverslip (iii) on a petridish, add water to clean (iv) add a drop of glycerine (v) add a few drops of safranin stain

Answer: (i) take out onion peel (ii) keep the peel in water in a petridish (iii) add a few drops of safranin stain and transfer to a slide (iv) add a drop of glycerine (v) cover it up with a coverslip

Question: To observe cells in an onion peel, we must prepare the slide by mounting on it

a) Thin layer of fleshy onion

b) Dry scale leaf

c) Green leaf of onion

d) Crushed pulp of onion

Answer: Thin layer of fleshy onion

Question: Which one of the following cell constituents cannot be seen while observing a human cheek cell?

a) Cell wall

b) Cytoplasm

c) Nucleus

d) Cell membrane

Answer: Cell wall

Question: To prepare a mount of human cheek cell, the sample is collected from

a) Inner side of cheek with a toothpick

b) Inner side of cheek with a blade

c) Outer side of cheek with a blade

d) Outer side of cheek with a toothpick

Answer: Inner side of cheek with a toothpick

Question: During observation of an onion peel, cells are first seen under

a) Low power

b) High power

c) Medium power

d) None of the options

Answer: Low power

Question: The number of lenses in a compound microscope is

a) 2

b) 3

c) 1

d) 4

Answer: 2

Question: The shape of nucleus in a plant cell is

a) Elliptical

b) Rectangular

c) Triangular

d) Round

Answer: Elliptical

Question: The shape of onion peel cells taken for observation under microscope is

a) Rectangular

b) Elliptical

c) Round

d) Round

Answer: Rectangular

Question: The outer most layer of human cheek cell is

a) Plasma membrane

b) Nuclear membrane

c) Cell wall

d) Middle lamella

Answer: Plasma membrane

Question: The organelle not present in human cheek cell is

a) Chloroplast

b) Cell membrane

c) Mitochondria

d) Nucleus

Answer: Chloroplast

Question: The outermost covering of a plant cell is

a) Cell wall

b) Nuclear membrane

c) Plasma membrane

d) Middle lamella

Answer: Cell wall

Question: Temporary mount of a tissue is made in

a) Glycerine

b) Xylene

c) Alcohol

d) Wax

Answer: Glycerine

Question: In plant cell, nucleus is generally placed

a) On one side of the cell

b) Attached to cell membrane

c) In the centre

d) On one corner of the cell

Answer: On one side of the cell

Question: In animal cheek cells, nucleus is generally located

a) In the centre

b) On one side

c) Near the plasma membrane

d) Any where in the cell

Answer: In the centre

Question: Cells are focused in microscope under

a) 40x

b) 10x

c) 100x

d) Any of the options

Answer: 40x

Question: We generally mount the material on slide

a) In the centre

b) On left side of slide

c) On right side of slide

d) None of the options

Answer: In the centre

Question: Plant cells generally have

a) Big but less number of vacuoles

b) Small but large number of vacuoles

c) No vacuoles at all

d) All equal sized vacuoles

Answer: Big but less number of vacuoles

Question: Name the stain which is commonly used to study plant cells

a) Safranin

b) Cotton blue

c) Acetocarmine

d) Methylene blue

Answer: Safranin

Question: Coverslip is put on the mounted material on a slide very gently to

a) Avoid entry of air bubbles

b) Avoid oozing of glycerine

c) Avoid oozing of stain

d) Avoid the crushing of mounted materials

Answer: Avoid entry of air bubbles

Question: Definite shape of cell is seen in case of

a) Plant cells

b) Animal cell

c) Both animal and plant cells

d) Neither animal nor plant cells

Answer: Plant cells

Question: Human cheek cells are commonly stained with

a) Methylene blue

b) Eosine

c) Acetocarmine

d) Safranin

Answer: Methylene blue