Support and Movement MCQs

1. Which of the following plays the major role in providing support to young herbaceous parts of the plant:

Living cells of epidermis with higher turgor pressure.

Living cells of cortex and pith with higher turgor pressure.

Collenchyma cells

All of these

✅ The correct answer is option D.

2. Higher turgor pressure in a plant cell is maintained by:

A large number of vacuoles in a plant cell.

Higher ionic concentration inside vacuoles resulting from active pumping of ions at their tonoplastic membrane

A higher osmotic pressure of the cell vacuole

both B and C

✅ The correct answer is option D.

3. The secondary cell wall of sclerenchyma cells is impregnated with

Cellulose.

Peptidoglycan and murein.

Lignin.

Pectin.

✅ The correct answer is option C.

4. Among the followings which are the longest supportive cell?

Tracheids.

Sclereids.

Trachea.

Collenchyma cells

✅ The correct answer is option A.

5. An increase in plant girth due to the activity of _____ is called secondary growth.

Cork cambium

Pith.

Vascular cambium.

Both a and c

✅ The correct answer is option D.

6. Vascular Cambium initially appears as actively dividing cells between:

Primary Xylem and secondary xylem.

Primary xylem and secondary phloem.

Primary xylem and primary phloem

Secondary xylem and secondary phloem.

✅ The correct answer is option C.

7. Sperms of liverworts, mosses, ferns move towards archegonia, in response to nucleic acid released by the ovum. This is an example of:

Chemotropic movement

Chemotactic movement.

Chemotactic movement

Hyponastic movement.

✅ The correct answer is option B.

8. The place of attachment of leaf with the shoot is called:

Pith.

Pit.

Pulvinus.

Ecdysone.

✅ The correct answer is option C.

9. Rapid movement of leaves of mimosa on touching is an example of :

Turgor movement

Nastic movement

Tropic movements

Growth movement

✅ The correct answer is option A.

10. Roots of a plant show

Positive phototropism and negative geotropism.

Negative phototropism and positive geotropism.

Negative tactic movement and positive tropic movement.

Positive geotropism of stem and roots

✅ The correct answer is option B.