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MCQs

Total Questions : 159 | Page 4 of 16 pages
Question 31. The fluid matrix of a cell is called the
  1.    nucleus
  2.    cytosol
  3.    cytoskeleton
  4.    endoplasmic reticulum
 Discuss Question
Answer: Option B. -> cytosol
Answer: (b).cytosol
Question 32. Mitochondria can be expected most numerous in
  1.    green cells
  2.    red blood cells
  3.    muscle cells
  4.    none of these
 Discuss Question
Answer: Option C. -> muscle cells
Answer: (c).muscle cells
Question 33. Which of the following elements is likely to form the least polar covalent bond with hydrogen?
  1.    Nitrogen
  2.    Oxygen
  3.    Carbon
  4.    Phosphorus
 Discuss Question
Answer: Option C. -> Carbon
Answer: (c).Carbon
Question 34. Chemical energy is supplied to eukaryotic cells by
  1.    chloroplasts and golgi complexes
  2.    mitochondria and ribosomes
  3.    mitochondria only
  4.    mitochondria and chloroplasts
 Discuss Question
Answer: Option D. -> mitochondria and chloroplasts
Answer: (d).mitochondria and chloroplasts
Question 35. Which part of a plant contains the male sex cell?
  1.    Ova
  2.    Style
  3.    Stamen
  4.    Pollen
 Discuss Question
Answer: Option D. -> Pollen
Answer: (d).Pollen
Question 36. A widely accepted explanation for transport of sugar in phloem is called
  1.    root pressure theory
  2.    transpiration
  3.    pressure flow hypothesis
  4.    cytoplasmic streaming
 Discuss Question
Answer: Option C. -> pressure flow hypothesis
Answer: (c).pressure flow hypothesis
Question 37. The movement of most minerals, including potassium into root cells is by
  1.    osmosis
  2.    diffusion
  3.    bulk flow
  4.    active transport
 Discuss Question
Answer: Option D. -> active transport
Answer: (d).active transport
Question 38. Phloem is composed of
  1.    vessel elements and companion cells
  2.    tracheids and vessel elements
  3.    sieve-tube elements and companion cells
  4.    tracheids and sieve-tube elements
 Discuss Question
Answer: Option C. -> sieve-tube elements and companion cells
Answer: (c).sieve-tube elements and companion cells
Question 39. The evaporation of water from leaves is called
  1.    transpiration
  2.    cohesion
  3.    tension
  4.    pressure flow
 Discuss Question
Answer: Option A. -> transpiration
Answer: (a).transpiration
Question 40. The cohesion-tension theory of water movement helps to explain how water moves from soil into root?
  1.    Through the phloem
  2.    From leaf to root
  3.    Through the xylem
  4.    Into the guard cells
 Discuss Question
Answer: Option C. -> Through the xylem
Answer: (c).Through the xylem

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