NDA BIOLOGY QUIZ

Question 1:

The rate of absorption of water is slow at temperature freezing point because of-

It is mainly a metabolic process

Cell membrane becomes more viscous

Transpiration is retarded

Growth of cells stops

Question 2:

Which of the following statement is/ are correct with respect of phloem loading?

Oxygen is necessary during transfer of food from mesophyll cells to phloem

Boron is highly essential for translocation of sugar.

Translocation of photosynthates is highly sensitive to the amount of water in plant cells.

Cytokinins have a pronounced effect on the translocation of water soluble nitrogen compounds.

Question 3:

The water potential of pure water is-

Zero

Less than zero

More than zero but less than one

More than one

Question 4:

Water is absorbed along with mineral solutes by root hairs by

Diffusion

Osmosis

Reverse-osmosis

Transpiration

Question 5:

What is the process in which energy is utilized in the form of ATP?

Diffusion

Facilitated diffusion

Active transport

None of these

Question 6:

Water potential in a cell of root hair absorbing water is

More than that of soil water

More than zero

Less than zero

Zero

Question 7:

Most water absorption in plants takes place through

Root cap

Root apex

Root hair zone

Meristematic zone

Question 8:

Which of following factors affecting translocation?

Light
Temperature
Oxygen
Water

Select the correct factor by using below the following code

1,2 and 3

2,3, and 4

1,2 and 4

1, 2, 3 and 4

Question 9:

A potometer is a piece of apparatus designed to measure water uptake in a leafy shoot. It is works on the principle

Osmotic pressure

Amount of water absorbed equals the amount transpired

Potential difference between the tip of the tube and that of the plant

Root pressure

Question 10:

The value of osmotic pressure depends on ?

Concentration of solute

Concentration of solution

Concentration of solvent

Concentration of substrate

NDA BIOLOGY QUIZ - 19

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NDA BIOLOGY QUIZ - 19

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