Chapter 11

In flowering plant, we need to transport (a) Water and mineral nutrients (b) Organic nutrients (c) Plant growth regulators (d) All of these

For covering a small distance, the substances move by (a) Diffusion (b) Cytoplasmic streaming (c) Active transport (d) All of these

Transport over longer distance is known as (a) Translocation (b) Transformation (c) Transduction (d) Diffusion

Which of the following undergoes multidirectional transport? (a) Water (b) Mineral nutrients (c) Organic nutrients (d) Both (b) and (c)

Transport of which substance is essentially unidirectional in xylem? (a) Water (b) Mincral nutricnts (c) Organic nutricnts (d) Both (a) and (b)

Select the correct statement from the following: (a) Mineral nutrients taken up by the roots and transported upward into stem, leaves and growing region. (b) When a plant part undergoes senescence, the nutrient always remain in the senescence part and gets lost from the plant. (c) In flowering plant the complex traffic of compound in unorderly manner moving in different direction. (d) All hormones shows polarised movement.

Diffusion can occur between (a) One part of cell to other part (b) Cell to cell (c) Intercellular space to outside of leaf (d) All of these

The only mode of gaseous movement in plant body is (a) Diffusion (b) Osmosis (c) Facilitated transport (d) All of these

Which of the following is incorrect about diffusion? (1) Molecules move in random fashion. (2) It occurs from higher to lower concentration. (3) It is a slow process. (4) It does not depend on living system. (5) Protein carriers are required. (6) It is a passive process. (a) Only 1 and 5 (b) Only 5 (c) 1,3 and 5 only (d) Only 4

Diffusion rate is affected by (a) Concentration gradient (b) Membrane permeability through which it occur (c) Pressure and temperature (d) All of these

Find out the total number of false statements from the following. (1) The diffusion rate depends on the size of substrate. (2) Diffusion across membrane depends upon the solubility of lipids. (3) Membrane protein provide sites for hydrophilic substance to cross membrane. (4) Facilitated diffusion do not require concentration gradient. (a) 1 (b) 2 (c) 3 (d) 4

Facilitated diffusion requires to transport substance across membrane. (a) Special membrane protein (b) ATP (c) Protein inhibitor (d) All of these

Which process undergoes saturation? (a) Facilitated diffusion (b) Active transport (c) Simple diffusion (d) Both (a) and (b)

Which of the following transport is not highly selective? (a) Facilitated diffusion (b) Active transport (c) Simple diffusion (d) All of these

Where are poring proteins present? (a) Outer membrane of plastid (b) Inner membrane of mitochondria (c) Inner membrane of some bacteria (d) Outer membrane of ribosomes

Choose the total number of correct statements from the following: (1) Some channels in membrane are always open. (2) Porins allow the passage of molecule of size up to small protein. (3) Water channel made up of eight different type of aquaporins. (4) Facilitated diffusion is very specific. (a) 1 (b) 2 (c) 3 (d) 4

Some transport proteins allow diffusion only. If two type of molecules move together in the same direction. Such type of transport is known as (a) Symport (b) Antiport (c) Uniport (d) All of these

If two type of molecules move together in opposite direction. Such type of transport is known as (a) Symport (b) Antiport (c) Uniport (d) All of these

When the molecule move across in a membrane independent of other molecules through carrier protein the process is known as (a) Symport (b) Antiport (c) Uniport (d) All of these

A transport which uses cnergy to pump molecules against a concentration gradient is known as (a) Diffusion (b) Facilitated diffusion (c) Active transport (d) All of these

Proteins in the membrane, responsible for facilitated diffusion and active transport, show some common characteristic like. (1) Being highly selective (2) Bcing liable to saturate (3) Responding to inhibitor (4) Being regulated by hormones (a) 1 and 2 only (b) 2 and 3 only (c) 3 and 4 only (d) All of these

Identify A, B and C shown in this table: \(\begin{array}{lccc}\text { Property } & \begin{array}{c}\text { Simple } \\\ \text { Diffusion }\end{array} & \begin{array}{c}\text { Facilitated } \\\ \text { Transport }\end{array} & \begin{array}{c}\text { Active } \\ \text { Transport }\end{array} \\ \text { Requires special membrane proteins } & \text { A } & \text { Yes } & \text { Yes } \\ \text { Highly selective } & \text { No } & \text { Yes } & \text { Yes } \\ \text { Transport Saturates } & \text { No } & \text { B } & \text { Yes } \\ \text { Uphill transport } & \text { No } & \text { No } & \text { C } \\ \text { Requires ATP energy } & \text { No } & \text { No } & \text { Yes } \\ \begin{array}{lc}\text { (a) A-Yes, B-Yes, C-Yes } & \text { (b) A-Yes, B-No, C-Yes }\end{array}\end{array}\) a) (a) A-Yes, B-Yes, C-Yes A-Yes, B-No, C-Yes (c) \(\mathrm{A}-\mathrm{No}, \mathrm{B}-\mathrm{Yes}, \mathrm{C}-\mathrm{Yes}\) (d) A-No, B-No, C-Yes

Select the incorrect statement from the following: (1) A watermelon has over 92 per cent water. (2) Most herbaceous plants have only about \(10-15 \%\) of its fresh water as dry matter. (3) Woody parts of the plant have very little water. (4) Sced is without water. (5) Mature corn plant absorbs almost three litres of water per day. (6) Mustered plant absorbs water epical to its own weight in about 5 hours. (a) All cxcept 6 (b) All cxcept 5 (c) Only 4 (d) Only 3

The major similarity between active transport and facilitated diffusion is that (a) Both consume ATP (b) Both are passive (c) Both are non-selective (d) Both require membrane proteins

Which of the following has minimum amount of water? (a) Leaf (b) Flower (c) Epidermal cell of root (d) Cork

Select from the following which one is moved by active transport (1) \(\mathrm{Na}^{+}\) amino acid, in proximal convoluted tubules. (2) Absorption of most minerals by epidermal cells of root. (3) \(\mathrm{Na}^{+} \mathrm{K}^{+}\) pump. (4) Loading of sucrose from companion cell to sieve tube cells. (a) All except 4 (b) All except 3 (c) All except 1 (d) All of these

The two main components which determine water potential are (a) Solute potential (b) Pressure potential (c) Matric potential (d) Both (a) and (b)

Which of the following has the maximum water potential? (a) \(1 \mathrm{M}\) of \(\mathrm{NaCl}\) (b) \(0.5 \mathrm{M}\) of glucose (c) Pure water (d) \(0.001 \mathrm{M}\) of \(\mathrm{HCl}\)

What is the condition for pure water having zero water potential? (a) Standard temperature (b) No pressure (c) At 1 atm pressure (d) Only (a) and (b)

The relationship between \(\psi_{w}, \psi_{s}\) and \(\psi_{p}\) can be given as: (a) \(\psi_{s}=\psi_{w}+\psi_{p}\) (b) \(\psi_{p}=\psi_{w}+\psi_{s}\) (c) \(\psi_{w}=\psi_{p}+\psi_{s}\) (d) All of these

Which of the following is important to determine that what is going in or out of the plant cell? (a) Cell membrane only (b) Tonoplast only (c) Both together (d) Cell wall only

Cell wall is (a) Permeable (b) Impermeable (c) Semi-permeable (d) Selectively permeable

Osmosis means diffusion of water across (a) Semi-permeable membrane (b) Differentially permeable membrane (c) Permeable membrane (d) Both (a) and (b)

Water will move from (a) Higher pressure potential to lower (b) Higher solute potential to lower (c) Higher water potential to lower (d) Lower water potential to higher

How we can get the egg membrane? (a) Remove yolk and albumin through a small hole at one end of the egg (b) Place the shell in dilute HCl for few hours (c) Both (a) and (b) (d) None of these

Select the correct statement from the following: (a) Osmotic pressure is the negative pressure applied. (b) Osmotic potential is positive. (c) More is the solute concentration of solution, more will be the pressure required to prevent water from diffusing in. (d) The net direction and the rate of osmosis does not depend on the pressure gradient nor on concentration gradient.

Which portion of the root absorbs both water and minerals? (a) Terminal portion of roots (b) Zone of cell elongation (c) Zone of cell formation (d) Zone of cell differentiation

Meaningful girdling (ringing) experiments cannot be done on sugarcane because (a) Phloem is present inside the xylem (b) It cannot tolerate the injury (c) Vascular bundles are scattered (d) Plants are very delicate

Some leaves are removed from the stem cuttings planted for vegetative propagation. This is done (a) To increase water uptake (b) Because it helps in rooting of cuttings (c) To reduce water loss (d) Because the cuttings need less food

In terms of permeability, the cell wall and plasmalemma are (a) Permeable and differentially permeable respectively (b) Both semi-permeable (c) Scmi-permeablc and differentially permeable (d) Both differentially permeable

The process of osmosis involves (a) Movement of solute through semi-permeable membrane (b) Movement of solvent through a semi-permeable membrane (c) Movement of solution through a semi-permeable membrane (d) None of these

Dry seeds when placed in water swells due to (a) Imbibitions (b) Absorption (c) Diffusion (d) Adsorption

A cell placed in strong solution will shrink because (a) Cytoplasm will decompose (b) Mineral salt will break the cell wall (c) Salt water enter the cell (d) Water comes out by exosmosis

A cell increases in volume if the external medium is (a) Hypotonic (b) Hypertonic (c) Isotonic (d) None of these

All the following involves osmosis except (a) Water from soil entering a root hair (b) Water passing from root hair to adjacent cells (c) Water passing up a xylem vessel element to xylem vessel element above it (d) Water entering a mesophyll cell from xylem vessel element

A cell is plasmolysed after being kept in a hypertonic solution. What will be present between the cell wall and plasmalemma? (a) Isotonic solution (b) Hypertonic solution (c) Air (d) Hypotonic solution

Wilting of a plant results from excessive (a) Respiration (b) Photosynthesis (c) Absorption (d) Transpiration

Water moves across a selectively permeable membrane: From (a) Region of higher water potential \(\quad\) Region of lower water potential (b) Lower water concentration Higher water concentration (c) Higher solute concentration Lower solute concentration (d) Region of higher osmotic potential Region of lower osmotic potential

In seed germination, the first phenomenon which takes place is called (a) Diffusion (b) Osmosis (c) Imbibitions (d) All of these

Deplasmolysis occurs in a cell when it is placed in (a) Hypotonic solution (b) Hypertonic solution (c) Isotonic solution (d) Buffer solution