Which type of transpiration accounts for the maximum loss of water in plants? MCQ with Answer and Explanation

Which type of transpiration accounts for the maximum loss of water in plants?
A. Bark transpiration
B. Lenticular transpiration
C. Cuticular transpiration
D. Stomatal transpiration
Answer: Option D
Solution (By JKExamLibrary)
Stomatal transpiration, which occurs through the stomata (pores) on the leaf epidermis, accounts for about 90% of the total water loss in plants. Cuticular transpiration occurs through the waxy cuticle and is minimal. Lenticular transpiration occurs through lenticels in woody stems and is also very small.

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Practice More Biology Questions

Question #1
Assertion (A): Fermentation produces less ATP than aerobic respiration.
Reason (R): Fermentation involves only glycolysis and does not use the Krebs cycle or electron transport chain.
A. A false, R true.
B. Both A and R are true, but R is not the correct explanation.
C. Both A and R are true, and R is the correct explanation.
D. A true, R false.

Correct Answer: Option C


Explanation:
Fermentation yields only 2 ATP from glycolysis, while aerobic respiration yields ~36-38. The reason correctly explains the lower yield.

This question belongs to: Science Biology
Question #2
The organelle that contains enzymes for intracellular digestion is the:
A. Mitochondria
B. Peroxisome
C. Lysosome
D. Chloroplast

Correct Answer: Option C


Explanation:
Lysosomes are membrane-bound vesicles packed with hydrolytic enzymes (proteases, lipases, nucleases) that digest macromolecules, old organelles, and engulfed pathogens. They maintain an acidic pH (about 5.0) for optimal enzyme activity. Peroxisomes detoxify peroxides, mitochondria generate ATP, chloroplasts perform photosynthesis.

This question belongs to: Science Biology
Question #3
The enzyme that catalyzes the synthesis of ATP in mitochondria is:
A. Succinate dehydrogenase
B. Cytochrome oxidase
C. Citrate synthase
D. ATP synthase

Correct Answer: Option D


Explanation:
ATP synthase (Complex V) uses the proton gradient generated by the electron transport chain to phosphorylate ADP to ATP. Cytochrome oxidase is Complex IV, succinate dehydrogenase is part of the Krebs cycle and Complex II, citrate synthase is in the Krebs cycle.

This question belongs to: Science Biology