A plant cell becomes turgid due to

• plasmolysis

• exosmosis

• endosmosis

• electrolysis

Living. cells placed in isotonic solution (0.9% saline) retain their size and shape. This is based on the concept of

• osmosis

• diffusion

• facilitated diffusion

• transpiration

In higher plants, continuity of cytoplasm from one cell to its neighbouring cells is established through

• apoplast

• chloroplast

• leucoplast

• symplast

Which of the following criteria does not pertain to facilitated transport?

• Requirement of special membrane proteins

• High selectivity

• Transport saturation

• Uphill transport

In which one of the following, expenditure of energy is required?

• Osmosis

• Diffusion

• Active transport

• Passive transport

Guttation is a process of loss of water in

• liquid form containing dissolved minerals

• liquid form without dissolved minerals

• vapour form with minerals

• vapour form without minerals

77.

Engulfing ofsolid materials by cells is called

• pinocytosis

• phagocytosis

• active transport

• autolysis

Pick the reaction from the following, where a water molecule is removed and reduction of NAD⁺ does not occur in the reactions of respiration.

I. Succinic acid $\to$ Fumaric acid
II. Malic acid  $\to$ Oxaloacetic acid
III. 2-phosphoglycerate $\to$ phosphoenol pyruvic acid
IV. Pyruvic acid $\to$ Acetyl Co-A

The correct answer is

• I, IV

• I, II

• II, III

• I, III

With reference to water potential of a plant cell, the relationship is represented by

• ${\mathrm{\psi }}_{\mathrm{w}} = {\mathrm{\psi }}_m+ {\mathrm{\psi }}_{\mathrm{s}} + {\mathrm{\psi }}_{\mathrm{p}}$

• ${\mathrm{\psi }}_{\mathrm{w}} = {\mathrm{\psi }}_{\mathrm{m}} - {\mathrm{\psi }}_{\mathrm{s}} - {\mathrm{\psi }}_{\mathrm{p}}$

• ${\mathrm{\psi }}_{\mathrm{w}} = {\mathrm{\psi }}_{\mathrm{m} }- {\mathrm{\psi }}_{\mathrm{s}} + {\mathrm{\psi }}_{\mathrm{p}}$

• ${\mathrm{\psi }}_{\mathrm{w}} = {\mathrm{\psi }}_{\mathrm{m} }+ {\mathrm{\psi }}_{\mathrm{s}} - {\mathrm{\psi }}_{\mathrm{p}}$

Identify the wrong statement.

• The degree of decrease of chemical potential of water depends on concentration of solute

• Bacteria and fungal spores are killed when they enter into pickels and jams due to plasmolysis

• The process of water excudation is called transpiration

• Reverse plasmolysis will occur when flaccid cells are placed in hypotonic solution