Give an example of three daily life activities in which osmosis is involved.

Important Questions on The Fundamental Unit of Life

EASY

Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell

The living component of xylem tissue is

MEDIUM

Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell

Explain the following terms:
Diffusion

HARD

Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell

What are the components of the transport system in highly organized plants? How are water and minerals transported in plants? What is the role of transpiration in transporting water and minerals in plants?

EASY

Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell

The plasma membrane (pm) forms the boundary of lung cells. Which of the following statements is true for the pm?
A. Plasma membrane is a semipermeable membrane
B. Water moves across the pm by osmosis.
C. O₂ and CO₂ can cross the pm by diffusion.
D. Na⁺ and K⁺ ions can pass the pm by diffusion.

EASY

Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell

A biology teacher placed a hen’s egg in three different solutions:
Solution A: Pure water,
Solution B: saturated salt solution,
Solution C: Hydrochloric acid
The sequence of treatments and the ensuring probable effect on the egg are listed below:
I. A - B - C -Remains unchanged
II. B - C - A - Swells
III. C - A - B - Shrinks
IV. B - A - C - Loses salts
Based on the above sequence to treatment which one of the options will be correct?

EASY

Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell

The xylem in plants are responsible for

EASY

Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell

Identify the incorrect statements among the following.
A) Epidermal cells are parenchymatous and have small amount of cytoplasm
B) Gymnosperms have vessels in their xylem
C) In bicollateral vascular bundle, phloem is present on either side of cortex
D) Root endodermal cells have deposition of water impermeable, suberin as casparian strips

MEDIUM

Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell

Cell organelles are embedded in

EASY

Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell

A few dried raisins are put in water for some time and then placed inside the concentrated salt solution. What we observe is, raisins:

EASY

Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell

When a cell is placed in a strong salt solution. It shrinks, because:

EASY

Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell

Eukaryotic cells contain several membrane-bound subcellular structures called Organelles. The vacuole is one such organelle found in both animal and plant
cells. Which of the following statement are true for vacuoles?
A. Contain cell sap.
B. Provide turgidity to the plant cell.
C. Plant cell vacuoles are smaller than animals cell vacuoles.
D. Vacuoles store amino acids, sugar, acids and contain protein.

MEDIUM

Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell

Differentiate between the following pairs on the basis of what is mentioned in the brackets:

Osmosis and Active Transport (Substances undergoing movement)

EASY

Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell

DNA synthesis occurs in which stage of cell cycle.

EASY

Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell

Which of the following is not a component of phloem?

MEDIUM

Science>Biology>The Fundamental Unit of Life>Structural Organisation of a Cell