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

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

71.

A plant cell becomes turgid due to

  • plasmolysis

  • exosmosis

  • endosmosis

  • electrolysis


72.

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


73.

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

  • apoplast

  • chloroplast

  • leucoplast

  • symplast


74.

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

  • Requirement of special membrane proteins

  • High selectivity

  • Transport saturation

  • Uphill transport


Advertisement
Advertisement

75.

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

  • Osmosis

  • Diffusion

  • Active transport

  • Passive transport


C.

Active transport

Active transport is the only phenomenon of transportation which uses energy in the form of ATP to pump molecules or ions against a concentration gradient (i.e., low to high concentration). This is mainly carried out by the carrier proteins in the plasma membrane.

Diffusion is the transport of solvent or solute molecules (i.e., across a membrane). Osmosis (i.e., net movement of solvent molecules across a semi-permeable membrane) and passive transport (i.e., movement of biomolecules or other substances across cell membrane) does not require the expenditure of energy for the transportation of molecules or ions.


Advertisement
76.

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


78.

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  Fumaric acid
II. Malic acid   Oxaloacetic acid
III. 2-phosphoglycerate  phosphoenol pyruvic acid
IV. Pyruvic acid  Acetyl Co-A

The correct answer is

  • I, IV

  • I, II

  • II, III

  • I, III


Advertisement
79.

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

  • ψw = ψm+ ψs + ψp

  • ψw = ψm - ψs - ψp

  • ψw = ψm - ψs + ψp

  • ψw = ψm + ψs - ψp


80.

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


Advertisement