Chapter Exam

Chapter 12: Plant Anatomy and Plant Physiology — Online MCQ Test

Q: Which tissue system in plants provides mechanical support and protection?

Answer: B. Ground tissue system — The ground tissue system consists of parenchyma, collenchyma, and sclerenchyma, which provide structural support and storage.

Q: Which organelle is known as the 'powerhouse of the plant cell' for respiration?

Answer: B. Mitochondria — Mitochondria are the sites of cellular respiration where ATP is generated through aerobic pathways.

Q: During the light-dependent reaction of photosynthesis, which molecule is split to release oxygen?

Answer: D. Water — Photolysis of water occurs during the light reaction, releasing electrons, protons, and oxygen as a byproduct.

Q: If a plant is kept in complete darkness for a long duration, which process will be primarily affected?

Answer: C. Carbon dioxide fixation (Dark reaction) — The dark reaction depends on the ATP and NADPH produced during the light reaction; without light, these are not generated, halting glucose production.

Q: Which of the following processes couples the electron transport chain with ATP synthesis in mitochondria?

Answer: B. Chemiosmosis — Chemiosmosis describes the movement of ions across a semipermeable membrane, down their electrochemical gradient, to synthesize ATP.

SCIENCE · CLASS 10th · Tamil Nadu State Board

Practice Chapter 12: Plant Anatomy and Plant Physiology with a free chapter-wise online MCQ test for Tamil Nadu State Board CLASS 10th SCIENCE. This chapter covers: Focusing on plant internal structures this chapter details tissue systems plastids photosynthesis light and dark reactions. Students explore mitochondrial respiration cellular bioe.... AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 12: Plant Anatomy and Plant Physiology — Important Questions & Answers (FAQ)

Frequently asked questions from Tamil Nadu State Board CLASS 10th SCIENCE — Chapter 12: Plant Anatomy and Plant Physiology, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which tissue system in plants provides mechanical support and protection?

A. Dermal tissue system
B. Ground tissue system ✓
C. Vascular tissue system
D. Meristematic tissue system

Answer: B. Ground tissue system
The ground tissue system consists of parenchyma, collenchyma, and sclerenchyma, which provide structural support and storage.

Which organelle is known as the 'powerhouse of the plant cell' for respiration?

A. Chloroplast
B. Mitochondria ✓
C. Ribosome
D. Golgi apparatus

Answer: B. Mitochondria
Mitochondria are the sites of cellular respiration where ATP is generated through aerobic pathways.

During the light-dependent reaction of photosynthesis, which molecule is split to release oxygen?

A. Carbon dioxide
B. Glucose
C. ATP
D. Water ✓

Answer: D. Water
Photolysis of water occurs during the light reaction, releasing electrons, protons, and oxygen as a byproduct.

If a plant is kept in complete darkness for a long duration, which process will be primarily affected?

A. Transpiration
B. Water uptake
C. Carbon dioxide fixation (Dark reaction) ✓
D. Respiration

Answer: C. Carbon dioxide fixation (Dark reaction)
The dark reaction depends on the ATP and NADPH produced during the light reaction; without light, these are not generated, halting glucose production.

Which of the following processes couples the electron transport chain with ATP synthesis in mitochondria?

A. Glycolysis
B. Chemiosmosis ✓
C. Photolysis
D. Fermentation

Answer: B. Chemiosmosis
Chemiosmosis describes the movement of ions across a semipermeable membrane, down their electrochemical gradient, to synthesize ATP.

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