The process by which plants produce food using light energy is called: MCQ with Answer and Explanation

The process by which plants produce food using light energy is called:
A. Chemosynthesis
B. Fermentation
C. Cellular respiration
D. Photosynthesis
Answer: Option D
Solution (By JKSSB Mock Tests)
Photosynthesis converts light energy into chemical energy (glucose) using CO₂ and H₂O, releasing O₂. It occurs in chloroplasts. Respiration breaks down glucose, fermentation is anaerobic, chemosynthesis uses chemical energy.

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Practice More Biology Questions

Question #1
The hormone that relaxes the pubic symphysis during childbirth is:
A. Progesterone
B. Oxytocin
C. Relaxin
D. Estrogen

Correct Answer: Option C


Explanation:
Relaxin, produced by the corpus luteum and placenta, softens and relaxes the pelvic ligaments and pubic symphysis to facilitate childbirth. Oxytocin stimulates contractions.

This question belongs to: Science Biology
Question #2
The organelle that contains its own DNA and ribosomes and is involved in apoptosis is the:
A. Mitochondria
B. Endoplasmic reticulum
C. Peroxisome
D. Lysosome

Correct Answer: Option A


Explanation:
Mitochondria release cytochrome c and other factors that activate caspases, initiating apoptosis. They have circular DNA and 70S ribosomes.

This question belongs to: Science Biology
Question #3
Consider statements about plant hormones: 1. Auxins promote apical dominance. 2. Gibberellins cause bolting in rosette plants. 3. Cytokinins promote leaf senescence. Which are correct?
A. 1, 2 and 3
B. 2 and 3 only
C. 1 and 3 only
D. 1 and 2 only

Correct Answer: Option D


Explanation:
Auxins produced at the apex suppress the growth of lateral buds, maintaining apical dominance. Gibberellins induce rapid stem elongation or bolting in rosette plants before flowering. Cytokinins actually delay or prevent senescence (aging) of leaves by promoting nutrient mobilization, known as the Richmond-Lang effect. Therefore, statements 1 and 2 are correct, while 3 is false.

This question belongs to: Science Biology