KPPSC Biology MCQs

PPSC Lecturer Biology Test 82 Online Preparation MCQs

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There will be 25 multiple choice question in the test.
Answer of the questions will change randomly each time you start this test.
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Test Instructions:-
Test Name	Lecturer Biology
Subject	Biology Test 82
Test Type	MCQs
Total Questions	25
Total Time	20 Minutes
Total Marks	100

You have 20 minutes to pass to the quiz.

PPPSC LECTURER BIOLOGY ONLINE PRACTICE TEST NO. 82

1 / 25

What is correct about ascent of sap?

Both of these

Utilizes energy

Against the gravitational force

None of these

2 / 25

The force present amongst water molecules is

Gravitational force

Cohesive force

Adhesive force

Friction force

3 / 25

Water absorption in roots takes place by which process ?

Active

Active absorption

Active and passive

Passive

4 / 25

Source means:

Where food is accepted

Where food is synthesized

Place where food is digested

Where food is stored

5 / 25

In which form does the excess water absorbed by the roots is lost ?

Liquid form

All of these

Gaseous form

None of these

6 / 25

Which of the following is involved in the ascent of sap?

Surface tension

Cohesive force

Capillary action

All the above

7 / 25

What is the shape of the guard cells when they become turgid ?

Triangular

Elliptical

Crescent shaped

Semicircular

8 / 25

In dicots, where are the stomata located in maximum numbers ?

Dorsal surface of leaf

Leaf margin

In leaf stalk

Ventral surface of leaf

9 / 25

How much water is used by plants to maintain its life ?

Less

No water

Very less

10 / 25

Water can cross which of the following membranes in the transmembrane transport ?

None of these

Both of these

Tonoplast (vacuolar membrane)

Cytoplasmic membrane

11 / 25

In monocots, which cells are associated with the stomata:

Epidermal cells and accessory cells

Epidermal cells and guard cells

Guard cells and accessory cells

Only guard cells

12 / 25

The mineral nutrients reach the leaves through which path ?

Transpiration path

Phloem

Symplast pathway

Apoplast path

13 / 25

Why can’t the mineral nutrients be absorbed passively ?

They are in ionic form Plasma membrane is permeable and their concentration in roots is more

They are in ionic form. Plasma membrane is semi permeable. Their concentration is less in roots

None of the above

They can pass from the plasma membrane

14 / 25

Through which pathway is the least water transported ?

Vacuolar path

Symplastic pathway

All of the above

Apoplastic pathway

15 / 25

Sink means:

Place where food is stored

Place where food is required

None of these

Place where food is synthesized and stored

16 / 25

As the turgidity of the guard cells increases, the pore of the stomata:

Gets closed

Becomes broader

Becomes very narrow

Becomes narrow

17 / 25

Ascent of sap is the result of:

None of the above

Diffusion

Root pressure

Turgor pressure

18 / 25

Food is stored in which form in the cells of the roots ?

Sugar

Lipids

Protein

Mineral salts

19 / 25

Which of the following shows the least water potential ?

Stem cells

Cells of cortex

Root cells

Leaf cells

20 / 25

In which pathway, the water movement doesnot face much barriers:

Symplastic pathway

Vacuolar path

All of the above

Apoplastic pathway

21 / 25

Ascent of sap means:

Transport of food prepared in leaves towards the buds

Transport of water and salts towards the root system and stem

Transport of water and mineral salts absorbed by the root system towards the stem and leaves

Transport of food from the leaves for the roots

22 / 25

The stomata closes under which circumstances ?

When guard cells loose turgidity

When the turgidity of guard cells decreases

When water collects in guard cells

When water enters guard cells

23 / 25

Which organs take part in the process of transpiration ?

Only stem

Roots

Only leaves

Stem and leaves

24 / 25

Which cells in the roots behave as regulators?

Cortex

Endodermis

Epidermis

Pericycle

25 / 25

Transpiration is reduced under which circumstances ?

In humid soil

In humid atmosphere

When it is airy/windy

In dry atmosphere

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