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Plant Physiology

Total questions: 20

Worksheet time: 11mins

Name
Class
Date
1.

Opening and closing of stomata takes place due to changes in

a)

turgor pressure of guard cells

b)

plasmolysis of cells

c)

flaccidity of guard cells

d)

wall thickness in guard

2.

Transpiration occurs mainly through

a)

flower bud

b)

epidermis

c)

cuticle

d)

stomata

3.

Guttation is mainly due to

a)

transpiration

b)

imbibition

c)

osmosis

d)

root pressure

4.

Which one of the following is the anti-transpirant

a)

Succinic acid

b)

Phenyl Mercuric Acetate

c)

Acetic acid

d)

Indole Acetic Acid

5.

Name the epidermal cells that surrounds the guard cells of the stoma

a)

mesophyll cells

b)

subsidiary cells

c)

spongy cells

d)

velamen tissue

6.

Water has the highest latent heat of vapourization with 44KJ mol-1 at 25C

a)

True

b)

False

7.

------------------is an blue green algae that helps in Nitrogen fixation.

a)

Anabena

b)

Rhizobium

c)

Azolla

d)

Azotobacter

8.

Formation of fruits without pollination and fertilization is called---------------------.

(a)  

9.

The programmed aging process leading to death of an organ or plant is called as ---------------------.

a)

senescence

b)

maturation

c)

morphogenesis

d)

cell death

10.

-----------------is an ripening hormone.

a)

Auxin

b)

Giberellin    

c)

Cytokinin    

d)

Ethylene

11.

----------------------are small, spherical or rod shaped bodies associated with cellular respiration.

a)

Mitochondria        

b)

Plastids

c)

Ribosome

d)

Vacuole

12.

An electron transport system consists of 5 multiprotein complexes

a)

True

b)

False

13.

1.    The complex I in ETS chain is a NADH --------------------------enzyme.

a)

Dehydrogenase

b)

 hydrogenase

c)

oxidase

d)

phosphorylase

14.

Ubiqunone is a small, lipid soluble electron protein carrier

a)

True

b)

False

15.

Anaerobic respiration produces only --------------ATP molecules.

a)

2

b)

3

c)

4

d)

5

16.

Magnesium is an important component of

a)

enzymes

b)

Florigen

c)

Chlorophyll

d)

Haemoglobin

17.

An element is considered as essential, if

a)

it cannot complete the life cycle without it

b)

the action of it is specific

c)

directly involved in the nutrition

d)

all the above

18.

Pronounced interveinal chlorosis occuring in the young leaves due to the deficiency of ___________

a)

Magnesium

b)

Iron

c)

Boron

d)

Copper

19.

Cheif source of nitrogen is

a)

nitrate

b)

ammonia

c)

both

d)

none

20.

The most recognized role of nitrogen in the plant is its presence in the structure of protein molecule

a)

True

b)

False