Explore topic-wise MCQs in Biology.

This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.

1.

Statement A: Transpiration creates pressure in xylem sufficient enough to transport water up to 130 m high.
Statement B: Transpiration creates a pushing force.

A. Both the statements are true
B. Both the statements are false
C. Statement A is true but Statement B is false
D. Statement B is true but Statement A is false
Answer» D. Statement B is true but Statement A is false
Discussion
2.

Statement A: Inner wall is pushed outwards
Statement B: Outer wall is pulled outwards

A. Both the statements are true
B. Both the statements are false
C. Statement A is true but Statement B is false
D. Statement B is true but Statement A is false
Answer» E.
Discussion
3.

The small diameter of the tracheary elements increases ___________

A. adhesion
B. cohesion
C. tensile strength
D. capillarity
Answer» E.
Discussion
4.

Transpirative loss is studied through girdling experiment.

A. True
B. False
Answer» C.
Discussion
5.

Which among the following is an internal factor affecting transpiration?

A. Temperature
B. Humidity
C. % open stomata
D. Wind speed
Answer» D. Wind speed
Discussion
6.

Which among the following is an external factor affecting transpiration?

A. Light
B. Number of stomata
C. Canopy structure
D. Water status of plant
Answer» B. Number of stomata
Discussion
7.

Statement A: C3 plants are twice efficient as C4 plants in terms of fixing carbon dioxide.
Statement B: C4 plant loses twice the amount of water as C3 plant for same amount of CO2 fixed.

A. Both the statements are true
B. Both the statements are false
C. Statement A is true but Statement B is false
D. Statement B is true but Statement A is false
Answer» C. Statement A is true but Statement B is false
Discussion
8.

Which of the following is not a function of stomata?

A. Regulation of turgidity of guard cells
B. Loss of water vapor
C. Loss due to guttation
D. Exchange of O<sub>2</sub> and CO<sub>2</sub>
Answer» D. Exchange of O<sub>2</sub> and CO<sub>2</sub>
Discussion
9.

Isobilateral leaf has equal number of stomata on both surfaces of the leaf.

A. True
B. False
Answer» B. False
Discussion