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MCQs

Total Questions : 121 | Page 4 of 13 pages
Question 31. Which of the following are responsible causing the diseases?
  1.    Pathogens
  2.    T cells
  3.    Lymphocytes
  4.    Macrophages
 Discuss Question
Answer: Option A. -> Pathogens
Answer: (a).Pathogens
Question 32. Which of the following is present in both prokaryotes and eukaryotes?
  1.    Lysosome
  2.    Chloroplast
  3.    Plasma membrane
  4.    Vacuole
 Discuss Question
Answer: Option C. -> Plasma membrane
Answer: (c).Plasma membrane
Question 33. A certain cell organelle which is made of a double phospholipid bilayer that has many large pores in it, is most likely
  1.    the nuclear envelope
  2.    the plasma membrane
  3.    the mitochondrion
  4.    the cytoskeleton
 Discuss Question
Answer: Option A. -> the nuclear envelope
Answer: (a).the nuclear envelope
Question 34. In which of the following cell types more cellular detail can be observed using an electron microscope compared to a light microscope?
  1.    Animal
  2.    Bacterial
  3.    Protist
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Answer: (d).All of these
Question 35. Microtubules, motor proteins, and actin filaments are all part of
  1.    the mechanism of photosynthesis that occurs in chloroplasts
  2.    the rough ER (endoplasmic reticulum) in prokaryotic cells
  3.    the cytoskeleton of eukaryotic cells
  4.    the process that moves small molecules across cell membranes
 Discuss Question
Answer: Option C. -> the cytoskeleton of eukaryotic cells
Answer: (c).the cytoskeleton of eukaryotic cells
Question 36. Which of the following cell organelles are expected to be associated with motor proteins?
  1.    Smooth ER
  2.    Vesicles
  3.    Plasma membrane
  4.    Chloroplasts
 Discuss Question
Answer: Option B. -> Vesicles
Answer: (b).Vesicles
Question 37. Eukaryotic cells are more efficient than prokaryotes because their internal compartmentalization
  1.    makes each compartment nutritionally independent of all others
  2.    allows for specialization through the subdivision of particular tasks
  3.    allows for specialization through merging of different tasks
  4.    reduces overall cell size
 Discuss Question
Answer: Option B. -> allows for specialization through the subdivision of particular tasks
Answer: (b).allows for specialization through the subdivision of particular tasks
Question 38. The major second messengers are
  1.    cAMP
  2.    cGMP
  3.    DAG
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Answer: (d).All of these
Question 39. An organism's first line of defense against attack by an invader such as a virus or bacterium is usually
  1.    to flee or hide
  2.    its body wall
  3.    a specific immune response
  4.    a nonspecific immune response
 Discuss Question
Answer: Option B. -> its body wall
Answer: (b).its body wall
Question 40. The signaling molecules called steroid hormones
  1.    are made in one location of the body but have their effects some distance away
  2.    are hydrophilic and so cannot penetrate the plasma membrane
  3.    bind to cell surface receptors to trigger chemical cascades
  4.    never enter the blood of humans
 Discuss Question
Answer: Option A. -> are made in one location of the body but have their effects some distance away
Answer: (a).are made in one location of the body but have their effects some distance away

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