ppsc 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

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

No water

Very less

Less

2 / 25

Water absorption in roots takes place by which process ?

Active absorption

Active and passive

Passive

Active

3 / 25

In monocots, which cells are associated with the stomata:

Epidermal cells and guard cells

Epidermal cells and accessory cells

Only guard cells

Guard cells and accessory cells

4 / 25

The mineral nutrients reach the leaves through which path ?

Transpiration path

Phloem

Apoplast path

Symplast pathway

5 / 25

Ascent of sap is the result of:

Turgor pressure

None of the above

Root pressure

Diffusion

6 / 25

The force present amongst water molecules is

Adhesive force

Friction force

Cohesive force

Gravitational force

7 / 25

Through which pathway is the least water transported ?

Symplastic pathway

Apoplastic pathway

Vacuolar path

All of the above

8 / 25

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

Crescent shaped

Elliptical

Triangular

Semicircular

9 / 25

The stomata closes under which circumstances ?

When water collects in guard cells

When water enters guard cells

When guard cells loose turgidity

When the turgidity of guard cells decreases

10 / 25

Which organs take part in the process of transpiration ?

Stem and leaves

Only leaves

Only stem

Roots

11 / 25

Ascent of sap means:

Transport of food prepared in leaves towards the buds

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

Transport of water and salts towards the root system and stem

12 / 25

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

Becomes narrow

Gets closed

Becomes very narrow

Becomes broader

13 / 25

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

Gaseous form

None of these

All of these

Liquid form

14 / 25

Sink means:

Place where food is stored

Place where food is required

Place where food is synthesized and stored

None of these

15 / 25

What is correct about ascent of sap?

Utilizes energy

Both of these

Against the gravitational force

None of these

16 / 25

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

Ventral surface of leaf

In leaf stalk

Leaf margin

Dorsal surface of leaf

17 / 25

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

Cytoplasmic membrane

Both of these

None of these

Tonoplast (vacuolar membrane)

18 / 25

Which of the following shows the least water potential ?

Stem cells

Root cells

Leaf cells

Cells of cortex

19 / 25

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

Protein

Mineral salts

Lipids

Sugar

20 / 25

Source means:

Place where food is digested

Where food is stored

Where food is synthesized

Where food is accepted

21 / 25

Which cells in the roots behave as regulators?

Epidermis

Pericycle

Endodermis

Cortex

22 / 25

Why can’t the mineral nutrients be absorbed passively ?

They can pass from the plasma membrane

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

23 / 25

Transpiration is reduced under which circumstances ?

When it is airy/windy

In humid atmosphere

In dry atmosphere

In humid soil

24 / 25

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

Vacuolar path

Symplastic pathway

All of the above

Apoplastic pathway

25 / 25

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

Cohesive force

Capillary action

Surface tension

All the above

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