Cell Signalling And Transduction(Biochemistry ) Questions and Answers

Question 1. Which of the following statements about prokaryotes is false?
  1.    Prokaryotic cells concentrate important materials for the cells survival
  2.    The substance known as cytosol is found within the bacterial nucleus
  3.    Prokaryotic cells are much smaller than most eukaryotic cells
  4.    Ancient prokaryotes may have given rise to some eukaryotic organelles
Explanation:-
Answer: Option B. -> The substance known as cytosol is found within the bacterial nucleus
Answer: (b).The substance known as cytosol is found within the bacterial nucleus
Question 2. What do dystrophin, utrophin, actin, and tubulin have to do with eukaryotic cell structure and function?
  1.    They are components in the reactions of photosynthesis
  2.    They all participate in the degradation of large amounts of ATP
  3.    They all participate in the production of large amounts of ATP
  4.    They are all embedded proteins in plasma membranes
Explanation:-
Answer: Option C. -> They all participate in the production of large amounts of ATP
Answer: (c).They all participate in the production of large amounts of ATP
Question 3. Which of the following macromolecules are found in the plasma membrane?
  1.    Lipids and proteins only
  2.    Lipids, proteins, and carbohydrates
  3.    Proteins and carbohydrates only
  4.    Proteins only
Explanation:-
Answer: Option B. -> Lipids, proteins, and carbohydrates
Answer: (b).Lipids, proteins, and carbohydrates
Question 4. In which of the following cell organelles, it is expected to find the biochemical reactions that harness energy from the breakdown of sugar molecules to synthesize large amounts of ATP?
  1.    Lysosome
  2.    Vesicles
  3.    Mitochondria
  4.    Plasma membrane
Explanation:-
Answer: Option C. -> Mitochondria
Answer: (c).Mitochondria
Question 5. Clearly defined nucleus, mitochondria in a large central vacuole and chloroplasts, indicate the group of organisms from
  1.    bacteria
  2.    fungi
  3.    plants
  4.    animals
Explanation:-
Answer: Option C. -> plants
Answer: (c).plants
Question 6. In terms of basic cell structure, what do an elephant and an oak tree have in common?
  1.    They both are eukaryotes
  2.    They both have a cell nucleus
  3.    They both have mitochondria
  4.    All of the above
Explanation:-
Answer: Option D. -> All of the above
Answer: (d).All of the above
Question 7. Which of the following two organelles look most alike structurally?
  1.    Nucleus and vesicle
  2.    Golgi apparatus and smooth endoplasmic reticulum ER
  3.    Vacuole and cytoskeleton
  4.    Lysosome and chloroplast
Explanation:-
Answer: Option B. -> Golgi apparatus and smooth endoplasmic reticulum ER
Answer: (b).Golgi apparatus and smooth endoplasmic reticulum ER
Question 8. Which of the following organelles is directly connected to the outer membrane of the nucleus in a eukaryotic cell?
  1.    Mitochondrion
  2.    Lysosome
  3.    Golgi apparatus
  4.    Endoplasmic reticulum
Explanation:-
Answer: Option D. -> Endoplasmic reticulum
Answer: (d).Endoplasmic reticulum
Question 9. Where in a eukaryotic cell, DNA can be found?
  1.    Nucleus
  2.    Mitochondrion
  3.    Vacuole
  4.    Both (a) and (b)
Explanation:-
Answer: Option D. -> Both (a) and (b)
Answer: (d).Both (a) and (b)
Question 10. Which of the following structures is expected in a bacterium?
  1.    Nucleus
  2.    Plasma membrane
  3.    Golgi apparatus
  4.    Endoplasmic reticulum
Explanation:-
Answer: Option B. -> Plasma membrane
Answer: (b).Plasma membrane
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