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NEET UG BIOLOGY Multiple Choice Questions (MCQs)

NEET UG Biology MCQs (91-105)

91. Which of the following is the main site of gas exchange in plants?

A) Chloroplasts
B) Stomata
C) Mitochondria
D) Nucleus
Answer: B) Stomata

92. In cellular respiration, the process of glycolysis occurs in the:

A) Mitochondria
B) Cytoplasm
C) Nucleus
D) Endoplasmic reticulum
Answer: B) Cytoplasm

93. Which of the following is an anaerobic process in cellular respiration?

A) Glycolysis
B) Krebs cycle
C) Electron transport chain
D) Both B and C
Answer: A) Glycolysis

94. In the TCA cycle, which molecule is produced by the oxidation of acetyl-CoA?

A) Glucose
B) Lactic acid
C) Pyruvate
D) Carbon dioxide
Answer: D) Carbon dioxide

95. Which of the following is the final electron acceptor in the electron transport chain of aerobic respiration?

A) Oxygen
B) Carbon dioxide
C) NADH
D) Water
Answer: A) Oxygen

96. Which of the following pathways is amphibolic (both anabolic and catabolic)?

A) Glycolysis
B) Krebs cycle
C) Photosynthesis
D) Fermentation
Answer: B) Krebs cycle

97. How many ATP molecules are produced from one molecule of glucose during aerobic respiration?

A) 2
B) 18
C) 36
D) 38
Answer: D) 38

98. The Respiratory Quotient (RQ) is highest for:

A) Fats
B) Proteins
C) Carbohydrates
D) Water
Answer: C) Carbohydrates

99. The process of seed germination is primarily influenced by which factor?

A) Light
B) Oxygen
C) Temperature
D) All of the above
Answer: D) All of the above

100. Which of the following is NOT a phase of plant growth?

A) Lag phase
B) Log phase
C) Senescence phase
D) Maturation phase
Answer: C) Senescence phase

101. Which of the following is true regarding plant growth rate?

A) It is constant throughout the plant’s life cycle.
B) It is highest during seedling development.
C) It depends on the availability of nutrients and water.
D) It is highest during the flowering phase.
Answer: C) It depends on the availability of nutrients and water.

102. Differentiation in plant cells refers to:

A) The process where cells lose their specialized functions.
B) The formation of specialized cells from unspecialized cells.
C) The process of dedifferentiation.
D) The production of new tissues.
Answer: B) The formation of specialized cells from unspecialized cells.

103. What is the role of gibberellins in plants?

A) Stimulate flowering in short-day plants
B) Promote stem elongation
C) Inhibit seed germination
D) Reduce the effects of ethylene
Answer: B) Promote stem elongation

104. Which of the following is a gaseous plant growth regulator?

A) Cytokinin
B) Abscisic acid
C) Ethylene
D) Gibberellin
Answer: C) Ethylene

105. Which plant hormone is responsible for promoting the closure of stomata during water stress?

A) Cytokinin
B) Abscisic acid (ABA)
C) Auxin
D) Gibberellin
Answer: B) Abscisic acid (ABA)

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NEET UG BIOLOGY Multiple Choice Questions (MCQs)

NEET UG Biology MCQs (91-105)

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