Quiz: Plant Cell Organisation — 10 questions

1. What is the basic unit of structure and function in a plant?

A. A plant system

B. A plant cell

C. A plant organ

D. A plant tissue

Answer: (B)

Explanation

A plant cell is the basic unit of both structure and function in plants. Tissues, organs, and systems are higher levels of organisation.

2. Which sequence correctly represents the four levels of plant organisation from simplest to most complex?

A. Organs, systems, cells, tissues

B. Tissues, cells, systems, organs

C. Systems, organs, tissues, cells

D. Cells, tissues, organs, systems

Answer: (D)

Explanation

Plant organisation is described in the sequence cells, tissues, organs, and systems. Each level builds on the level before it.

3. Which structure is included among the main listed parts of a plant cell?

A. Muscle tendon

B. Nerve fibre

C. Chloroplast

D. Bone marrow

Answer: (C)

Explanation

The chloroplast is one of the main listed parts of a plant cell. The other options are not listed plant-cell components.

4. Why do the different parts of a plant cell work together?

A. To help the plant live and grow

B. To replace the need for genetic material

C. To make the cell function as an organ system

D. To prevent the cell from having specific roles

Answer: (A)

Explanation

The different parts of a plant cell work together to help the plant live and grow. Their cooperation supports the cell’s overall functioning.

5. What are the main functions of the plant cell wall?

A. Capturing light and transporting sugars

B. Providing support and protection

C. Controlling movement and producing proteins

D. Storing genetic information and releasing energy

Answer: (B)

Explanation

The plant cell wall gives support and protection to the cell. The cell membrane is a separate structure, so it should not be confused with the cell wall.

6. How does the rigidity of the plant cell wall affect the cell?

A. It allows the cell to change shape freely

B. It helps maintain the cell’s shape

C. It controls which substances enter the cell

D. It produces proteins for cellular growth

Answer: (B)

Explanation

The plant cell wall is rigid, and this rigidity helps maintain the shape of the cell. Controlling entry and exit of substances is associated with the separate cell membrane.

7. What does transpiration describe in a plant?

A. The movement of food through the stem

B. The transport of food from leaves

C. The absorption of minerals by roots

D. The loss of water as water vapour

Answer: (D)

Explanation

Transpiration is the loss of water from a plant in the form of water vapour. The transport of food from leaves is called translocation.

8. What is the primary function of translocation in plants?

A. Removing water vapour from the leaf surface

B. Absorbing mineral salts from the soil

C. Moving water from roots to leaves through xylem

D. Transporting food made in leaves to other parts

Answer: (D)

Explanation

Translocation transports food produced in the leaves to other parts of the plant. Water loss as vapour is instead associated with transpiration.

9. Through which tissue does water move from the roots to the leaves during transpiration?

A. Xylem

B. Stomata

C. Phloem

D. Root hair tissue

Answer: (A)

Explanation

During transpiration, water moves from the roots to the leaves through the xylem. Phloem carries food during translocation.

10. Which statement correctly describes the transport roles of roots and stems?

A. Roots transport food, while stems absorb mineral salts from the soil

B. Roots absorb water and mineral salts, while stems transport water and food

C. Roots release water vapour, while stems produce food for the plant

D. Roots absorb food, while stems transport only mineral salts

Answer: (B)

Explanation

Roots absorb water and mineral salts from the soil, while the stem transports water and food throughout the plant. These roles are distinct but complementary.