Page 1 - Home Assignment - I

SAI International School
Subject- Biology, Class- IX
Topic- The Fundamental Unit of Life
Subtopic-Types of Solutions
Module- 3
HOME ASSIGNMENT-I

Objective(MCQ)

1. Plasmolysis in a plant cell is defined as -
(a) break down (lysis) of plasma membrane in hypotonic medium
(b) shrinkage of cytoplasm in hypertonic medium
(c) shrinkage of nucleoplasm
(d) none of them
2. A cell will swell up if -
(a) The concentration of water molecules in the cell is higher than the
concentration of water molecules in surrounding medium
(b) The concentration of water molecules in surrounding medium is higher
than water molecules concentration in the cell
(c) The concentration of water molecules is same in the cell and in the
surrounding medium
(d) Concentration of water molecules does not matter
3. Select the odd one out -
(a) The movement of water across a semi permeable membrane is affected
by the amount of substances dissolved in it.
(b) Membranes are made of organic molecules like proteins and lipids
(c) Molecules soluble in organic solvents can easily pass through the
membrane.
(d) Plasma membranes contain chitin sugar in plants
4 Solute concentration is higher in the external solution –
(a) Hypotonic
(b) Isotonic
(c) Hypertonic
(d) None of the above
5 A plant cell becomes turgid due to –
(a) Plasmolysis
(b) Exosmosis
(c) Endosmosis
(d) Electrolysis
6 Plasmolysis occurs due to -
(a) Absorption
(b) Endosmosis
(c) Osmosis
(d) Exosmosis