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Cell The Unit of Life Test - 58

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Cell The Unit of Life Test - 58
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  • Question 1
    1 / -0
    Site for protein/peptide synthesis is
    Solution
    • The site for protein/peptide synthesis is Ribosome.
    • Ribosomes are known as protein factories because they are the main site of protein synthesis. 
    • They are composed of ribonucleic acids and proteins.
    • Its main function includes protein synthesis by translating the rRNA for forming specific proteins required for the cell functioning.
    • So, the correct answer is 'Ribosome'.
  • Question 2
    1 / -0
    RER is well developed in cells engaged in synthesis of
    Solution
    • The endoplasmic reticulum (smooth and rough) is an interconnected network of flattened, membrane-enclosed sacs or tube-like structure which are evenly distributed throughout the cytoplasm.
    • The factory of a cell is known as rough endoplasmic reticulum (studded with ribosomes).
    • The RER along with the ribosomes manufacture proteins and transport them to other parts of the cell (protein synthesis)
    • So, the correct answer is 'Proteins'.
  • Question 3
    1 / -0
    E.R. of rapidly dividing cells is _____________.
    Solution
    Endoplasmic reticulum (ER) is a system of membrane-lined channels found in all eukaryotic cells except mature erythrocytes. It constitutes more than 30 to 60 percent of total cell membranes. The endoplasmic reticulum is little or poorly developed in meristematic cells, young dividing cells etc. Membranes of Endoplasmic reticulum are thinner than most other cell membranes.
  • Question 4
    1 / -0
    Role of nucleus in morphological differentiation was discovered in _______________.
    Solution
    Answer is option (A) Acetabularia by Hammerling.
    In his experiments, Hammerling grafted the stalk of one species of Acetabularia onto the foot of another species.
    In all cases, the cap that eventually developed on the grafted cell matched the species of the foot rather than that of the stalk.
     In this example, the cap that is allowed to grow on the grafted stalk looks like the base species one... A. mediterranea
    This experiment shows that the base is responsible for the type of cap that grows. The nucleus that contains genetic information is in the base, so the nucleus directs cellular development.



















  • Question 5
    1 / -0
    Smallest cell organelles are
    Solution
    • The smallest cell organelle present within a cell is ribosome (based on the surface area of the organelle).
    • Ribosomes are known as protein factories because they are the main site of protein synthesis (composed of nucleic acids and proteins).
    • So, the correct answer is 'Ribosomes'.
  • Question 6
    1 / -0
    Lysosomes are called suicidal bags because they have
    Solution
    Correct Option: A
    Explanation:
    • Lysosomes are referred to as self-destructive luggage (suicidal bags) of the cell as a result of they contain Hydrolytic enzymes capable of digesting cells and unwanted materials. 
    • This causes the hydrolytic enzymes to be discharged. The discharged enzymes then digest their own cell, inflicting the cell to die. 
    • As a result, they're referred to as cell suicide bags. 
    • Hence, lysosomes are remarked as suicidal bags as they secrete Hydrolytic enzymes.
  • Question 7
    1 / -0
    Autolysis is connected with
    Solution
    • Lysosomes are membrane-bound organelles which contain acid hydrolases or digestive enzymes that digest excess or worn out organelles, food particles, engulfed viruses or bacteria and macromolecules.
    • They can also digest or damage its own cell causing the cell death which is also known as autolysis, therefore, they are also known as suicidal bags.
    • So, the correct answer is 'Lysosome'.
  • Question 8
    1 / -0
    What would happen if lysosomes get ruptured in a cell?
    Solution
    • If the lysosome gets ruptured or bursts open within a cell then it will cause autolysis i.e, it will digest the entire cell along with the cell organelles.
    • It contains acid hydrolases or digestive enzymes that digest excess or worn out organelles, food particles, engulfed viruses or bacteria and macromolecules.
    • They can also digest or damage its own cell causing the cell death (autolysis).
    • So, the correct answer is 'Cell dies'.
  • Question 9
    1 / -0
    Endoplasmic reticulum remains attached to
    Solution
    • Endoplasmic reticulum remains attached to the Nuclear envelope.
    • The endoplasmic reticulum forms a continuous membrane system with the nuclear membrane which is an extension of the nuclear membrane or the infolded plasma membrane.
    • So, The correct answer is 'Nuclear envelope'.

  • Question 10
    1 / -0
    The name mitochondria was given by
    Solution
    • The mitochondria is a double-membraned cell organelle, known as the powerhouse of the cell which is present in all eukaryotic cells.
    • They are called the power generators of the cell as it converts oxygen and nutrients into ATP molecules.
    • The term mitochondria was coined by Carl Benda in the year 1898.
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