2nd 25 Pages Science CH Cell

4.
The full form of ER is

(a) Energy ratio
(b) Energy rate
(c) Energy rain
(d) Endoplasmic reticulum

3. For making wet slides
(a)water is required
(b)Glycerin is required
(c) Both a and b may be required /
(d)none of these ~
2..Chlorophyll is found ilJ
(a) onlly in green plants y,

(b) only in dry plants
(c) Both a and b
(d) it is not found in plants
1. Which renders transport pf
oxygen within our body
(a) carbon
[b)carbon dioxide •
~c) carbon monoxide
:d)oxide
5.
Muscle cell Flat and broad
Nerve cell .....-i! Elongated shape
Skin cell pindle shape

4.
Microscope Dead organism
• •
Dry mount 1ve organism
Wet mount View organism

3.
Mitochondria Brain of the cell
Nucleu;;,~~ ,___. uicide bag
Lysosomes Power house

2. •
Digestive cell ell division
Chlorophyll . . . . . __ ysosomes
Mitosis ....,,,, hotosynthesis

1.
Smallest cell ....... rve cells
•
Largest cell ---~ paramecium
Unicellular cell Bacteria

3.Amoeba is ..........•.....
Unicellular organism
10. Red.J>lood cells transport oxygen
from lui s to tissues.
/FALSE)
9. Euglena is an multicellular
•
organism.
E/FAL )
8.Genes are an instruction manual for
our body.
7 .chromoplast contain en pigments.
(TRUE/F E)
2. Study the given diagram .is this an animal
cell or a plant cell? Explain your answer?
Ans- th is diagram is
of bacteria. It has
cell wall and lack of
nucleus. So it is
considered as in
plant category.
1. Why are cells considered both the structural
functional units of lite?
Ans-
The cell is known as the structural and
functional unit of life because all living
beings are formed of cells and cells are
also essential for performing various life
processes required for sustaining life.
ri!1p!.!Yi~ e!.~a~!ls-~ } 11
:he function of cell. --•• •
~moeba having projection
1>n them called pseudopodia, Col"mt\• •pitheU•I •net Gob'Pi o,lh
iNhich helps In locomotion
,feeding and other activities.
- --- - '
Muscle cells- having spindle

shape.
Nerve cell{neurons)-
Elongated shape. ••••u.:topo u ( - -
Skin cell- flat and broad in I . . .. ... ..".

C y • n .., . ,_
u ........... . , .
• ••doot••"" • • eou••
shape.
... ........ .
- -- - - - -- - - - - -- -- - - ---
8. Cells vary in shapes,5 sizes and numbers. Explain it with

the help of suitable examples.
Ans-cells size may vary from micrometers to few
centimeters.
Bacteria(smallest) - 0.2 to 0.5 µm
Nerve cells(largest)-100 µm to lm
Cell numbers-
Numbers of cells present in an organism depends on
the size of the organism.larger the size of the living being
more number of cells.
7.D[i!W awgll labgllgd diagram of nucleus. List the
functions of nucleus. - ;
~ns-(i) Nuclea r membrane
1
surrounds the nucleoplasm

which contain chromatin fibres. (O
(ii) chromatin fibres carry genes i-.,.., ,.,
which tansfers characteristics of

cell.
(iii) Nucleolus synthesise protein.
(iv) Nuclear pores exchange Large molecules (proteins
and RNA) between nucleus and cytoplasm.
(ii) It is responsible ~orting and
correctly shipping the fat~ and
proteins produced in the ER and also
helps in the formation of lysosome.
(iii) It protects the cell and allows

selected substances to pass through.
6.State the main function of the followin
(a) ER (b) Golgi apparatus c Cell membrane
Ans-
(i) ER(Endoplasmic reticulum)-!!'
rough ER synthesis of protein occur.
While smooth ER synthesize lipids
and helps in the de~ lication of
harmful substances 1nfffe cell.
M o thor c a ll
( ~,-,) - (~ X) --:\.:~!1:55=~~ d /' Two ~:,~:hto,

UNA ,•oph c. a.,o n _ ~ ~ ;_ - ' / ~
s. Name the process responsible for the•gvrowth of an

1
organism. Explain it.

Ans- Cell division is the process responsible for t he growth of
an organism.
The process in which parent cell is divide into two daughter
cells is known as cell division. Nuclear material splits into two
and then cytoplasm divides into two daughter cell which grow
to full size and divide again.
4. What are plant cell Golgi vesicles r--Cell wall
vac••o•es-' 1ist their Ribosome Peroxisome
functions. Smoolh Golgi appara1u1
endoplasmic
reliculum
Plasmodesmale
Ans- The large empty
Nucleus
space in the middle of Cenlral vacuolE
Rough
the cell is called vacuole. endoplasmic Chloroplasl
It stores materials like reliculum
Cytoplasm
sugar ,ion and pigments. Cytoskelelon "'-'" Milochondrion
Uittof,lj11t l\lS Ai:tl.
~
~ ::::: - ~ ~
--=::c...--
Cell membrane
3. What are chloroplasts? What is the main function of
chloroplast?
Ans- chloroplast is a kind of plastid.it is small disc like
--
structure found in the cells of green ~lants.it contain
green pigment called chlorophyll,=:. '"'"~- ~ ~
The main function of chloroplast

(chlorophyll) is to
help in photosynthesis.

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4.

The full form of ER is

(b) Energy rate

(c) Energy rain

(d) Endoplasmic reticulum

(c) Both a and b may be required /

(a) onlly in green plants y,

Nerve cell .....-i! Elongated shape

Skin cell pindle shape

Wet mount View organism

Nucleu;;,~~ ,___. uicide bag

Lysosomes Power house

Mitosis ....,,,, hotosynthesis

Unicellular cell Bacteria

Muscle cells- having spindle

Skin cell- flat and broad in I . . .. ... ..".

8. Cells vary in shapes,5 sizes and numbers. Explain it with

surrounds the nucleoplasm

(ii) chromatin fibres carry genes i-.,.., ,.,

which tansfers characteristics of

(iii) It protects the cell and allows

( ~,-,) - (~ X) --:\.:~!1:55=~~ d /' Two ~:,~:hto,

s. Name the process responsible for the•gvrowth of an

organism. Explain it.

The main function of chloroplast

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