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MCQs

Total Questions : 211 | Page 17 of 22 pages
Question 161. What is the effect of excessive rate of apoptosis?
  1.    Atrophy
  2.    Sneezing
  3.    Fever
  4.    AIDS
 Discuss Question
Answer: Option A. -> Atrophy
Answer: (a).Atrophy
Question 162. Oxidative stress (in humans) is not involved in the development of
  1.    Cancer
  2.    Parkinson’s disease
  3.    Heart failure
  4.    Kidney failure
 Discuss Question
Answer: Option D. -> Kidney failure
Answer: (d).Kidney failure
Question 163. What is the rate of apoptosis in average human adult per day?
  1.    10 billion cells
  2.    30 billion cells
  3.    50-70 billion cells
  4.    100 billion cells
 Discuss Question
Answer: Option C. -> 50-70 billion cells
Answer: (c).50-70 billion cells
Question 164. Which one of the following is true about C₄ plants?
  1.    They minimize rubisco oxygenase activity by fixing CO₂ into oxaloacetate
  2.    They mainly occur in areas of high temperature and light intensity
  3.    They minimize the rubisco oxygenase activity by fixing CO₂ into phosphoenolpyruvic acid
  4.    C₃ plants are more efficient in photosynthesis than C₄ plants
 Discuss Question
Answer: Option A. -> They minimize rubisco oxygenase activity by fixing CO₂ into oxaloacetate
Answer: (a).They minimize rubisco oxygenase activity by fixing CO₂ into oxaloacetate
Question 165. Programmed cell death can be termed as
  1.    Oxidative stress
  2.    Apoptosis
  3.    Cell division
  4.    Cell cycle
 Discuss Question
Answer: Option B. -> Apoptosis
Answer: (b).Apoptosis
Question 166. Which of the following statements about thylakoids is false?
  1.    They contain chlorophyll pigments
  2.    They contain the photosystems
  3.    They contain Calvin cycle enzymes
  4.    They contain the electron transport machinery
 Discuss Question
Answer: Option C. -> They contain Calvin cycle enzymes
Answer: (c).They contain Calvin cycle enzymes
Question 167. Hydrogen is transferred from the light reaction to the dark reaction in photosynthesis by
  1.    DPN
  2.    NAD
  3.    ATP
  4.    NADP
 Discuss Question
Answer: Option A. -> DPN
Answer: (a).DPN
Question 168. Which of the following about Calvin cycle is correct?
  1.    It is a metabolic pathway by which plants convert CO₂ into pentose sugars as the main product
  2.    With decrease in light intensity, the enzymes are more reactive
  3.    Rubisco adds CO₂ to 3-phosphoglycerate
  4.    It is a metabolic pathway by which plants convert CO₂ and water into carbohydrates
 Discuss Question
Answer: Option D. -> It is a metabolic pathway by which plants convert CO₂ and water into carbohydrates
Answer: (d).It is a metabolic pathway by which plants convert CO₂ and water into carbohydrates
Question 169. One of the following is the source of electrons in photosynthesis
  1.    Carbohydrates
  2.    CO₂
  3.    Water
  4.    NADH
 Discuss Question
Answer: Option C. -> Water
Answer: (c).Water
Question 170. Favorable conditions for cyclic photophosphorylation are
  1.    Aerobic and optimum light
  2.    Aerobic condition only
  3.    Aerobic and low light intensity
  4.    Anaerobic and low light intensity
 Discuss Question
Answer: Option A. -> Aerobic and optimum light
Answer: (a).Aerobic and optimum light

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