Question

सतगुरु की महिमा अनंत ,अनंत किया उपगार । लोचन अनंत उघाड़िया अनंत दिखावा हार।।

Answer 1

Answer:

ary

Cell is the basic unit of life. The term "cell" was coined by Robert Hooke.

cells show diversity

in number, shape and size. New cells arise by repeated division of pre-existing

cells. All life processes performed by our body is due to the activity of cells of body.

A typical cel has a cell membrane, nucleus and cytoplasm. Though animal and plant cells have

some differences, their basic structure

is same.

E

XERCISE

A. Multiple Choice Questions (MCQs)

1. Which of the tollowing scientists coined the term "cell"?

a. Robert Brown

bRobert Hooke

c. Antonie van Leeuwenhoek

d. Theodor Schwann

2 Which of the following is not a

postulate of cell theory?

A Al iving things

are made up of many cells.

b. Cells are the basic structural and functional units of all living beings.

C. All cells are basically the same in chemical composition and metabolic processes.

d. All new cells arise by the division of pre-existing cells.

3. Which of the following cells is responsible for folding and unfolding the body part in animals?

a. Cells of glands

c. Cells of eye

Muscle cells

d. Skin cells

4. Which of the followingis a colourlessplastid?

a. Chloroplast

uteucoplast

b. Chromoplast

d. None of these

.Which of the following organelles provide energy for all the activities of cell?

a. Chloroplast

c. Goli bodies

bMitochondria

d. Ribosomes

B. Fill in the blanks.

ells were first observed in cork by ob et-in

1665.

2 Cell is the Stouctuwnal and funtliona unit of lite.

3 An average cell size ranges from

to 0

cll

wall is an outermost protective layer of cell which is made up ot

Cellubose

rotoplasm is a

jelly like sulbstance present insicle the cell and can be ditterentiated into

a darker

denser part nuueopl ousm and the semi solid jelly like part, yfoplasm

5

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