Plant Physiology MCQ Set 5

Comprehensive NEET Preparation with 100 High-Quality Questions Based on NCERT Syllabus

Practice Questions - Set 5

Plant Growth and Development (Question 5 of 25)

Which plant hormone is primarily responsible for cell elongation and phototropism?

A

Gibberellin

B

Cytokinin

C

Auxin

D

Abscisic Acid

NCERT Explanation

Auxins are plant hormones that promote cell elongation in stems and coleoptiles. They are involved in phototropism, the growth response of plants to light. When light is directional, auxins accumulate on the shaded side, causing cells to elongate more on that side and resulting in the bending of the plant toward the light source.

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100

Performance Dashboard

89%

Overall Accuracy

4

Answered

15m

Time Spent

92%

Predicted Score

Overall Progress

4 of 100 questions completed

Topic Mastery

Photosynthesis 1/30

Respiration 1/20

Transport 1/25

Plant Growth 1/25

Topic Comparison

Content Highlights

Photosynthesis

• Light and dark reactions
• C3/C4 pathways
• Photorespiration
• Photosynthetic pigments
• Factors affecting photosynthesis

Respiration

• Glycolysis
• Krebs cycle
• Electron transport chain
• Fermentation
• Respiratory quotient

Transport in Plants

• Water relations
• Translocation
• Transpiration
• Mineral nutrition
• Ascent of sap

Plant Growth

• Plant hormones
• Photoperiodism
• Vernalization
• Seed germination
• Growth regulators

Comprehensive Plant Physiology MCQ Set 5 for NEET Preparation | Based on NCERT Syllabus

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