Chapter 12: Plant Anatomy and Plant Physiology — Online MCQ Test
SCIENCE · CLASS 10th · Tamil Nadu State Board
Practice Chapter 12: Plant Anatomy and Plant Physiology with a free chapter-wise online MCQ test.
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.
Chapter 12: Plant Anatomy and Plant Physiology — Important Questions & Answers
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.
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.
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.
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.
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.
Chemiosmosis describes the movement of ions across a semipermeable membrane, down their electrochemical gradient, to synthesize ATP.