NCERT Class 11-Biology: Chapter –11 Transport in Plants Part 2

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Question 10:

Based on the figure given below which of the following statements is not correct?

Chapter 10 - Question 10 Statements is not Correct

Chapter 10 - Question 10 Statements is Not Correct

a. Movement of solvent molecules will take place from chamber A to B.

b. Movement of solute will take place from A to B.

c. Presence of a semipermeable is a pre-requisite for this process to occur.

d. The direction and rate of osmosis depends on both the pressure gradient and concentration gradient.

Answer: (b)

Question 11:

Match the followings and choose the correct option

Chapter 11 - Question 11 Table of Choose the Correct Option
Chapter 11 - Question 11 Table of Choose the Correct Option

A.

Leaves

i.

Anti-transpirant

B.

Seed

ii.

Transpiration

C.

Roots

iii.

Negative osmotic potential

D.

Aspirin

iv.

Imbibition

E.

Plasmolyzed cell

v.

Absorbtion

Options:

a. A-iii, B-iv, C-i, D-ii

b. A-i, B-ii, C-iii, D-iv

c. A-iii, B-ii, C-iv, D-i

d. A-iii, B-ii, C-i, D-iv

Answer: (b)

Question 12:

Mark the mismatched pair.

Chapter 11 - Question 12 Table of Mark the Mismatched Pair
Chapter 11 - Question 12 Table of Mark the Mismatched Pair

a.

Amyloplast

i.

Store protein granule

b.

Elaioplast

ii.

Store oils or fats

c.

Chloroplasts

iii.

Contain chlorophyll pigments

d.

Chromoplasts

iv.

Contain coloured pigments other than chlorophyll

e.

Leucoplast

v.

Contains colourless pigments

Answer: (a)

Very Short Answer Type Questions

Question 1:

Smaller, lipid soluble molecules diffuse faster through cell membrane, but the movement of hydrophilic substances are facilitated by certain transporters which are chemically ____________.

Answer:

Smaller, lipid soluble molecules diffuse faster through cell membrane, but the movement of hydrophilic substances are facilitated by certain transporters which are chemically proteins.

These transporters can be carrier proteins or channel proteins. Transport by carriers can be either active or passive, whereas flow of substances through channel proteins is always passive.

Protein Charrel and Carrier Protein

Protein Charrel and Carrier Protein

Question 2:

In a passive transport across a membrane, when two protein molecules move in opposite direction and independent of each other, it is called as ___________.

Answer:

When molecules move in opposite direction then it is antiport but when independent of each other then they follow uniport of facilitated diffusion.

Question 3:

Osmosis is a special kind of diffusion, in which water diffuses across the cell membrane. The rate and direction of osmosis depends upon both ______________.

Answer:

Osmosis is a special kind of diffusion, in which water diffuses across the cell membrane. The rate and direction of osmosis depends upon both pressure and concentration gradient.

In osmosis, the flow of solvent molecules is along their concentration gradient i.e. from more dilute to less dilute solution. Reverse osmosis occurs when pressure applied does not allow this osmosis to take place and instead moves from the less dilute to the more dilute solute basis the pressure applied.

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