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Cell The Unit of Life Test - 79

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Cell The Unit of Life Test - 79
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  • Question 1
    1 / -0
    Microbodies are minute vesicles and are present in
    Solution
    Microbodies are a type of organelles that are found in both plant and animal cells. The organelles in the microbody family include peroxisomes, glyoxysomes, glycosomes and hydrogenosomes. In vertebrates, microbodies are especially prevalent in the liver and kidney organs.
    So, the correct answer is 'Both plant and animal cells'.
  • Question 2
    1 / -0
    Read the following pairs of examples of organisms. The pair that belongs to the group prokaryotes is
    Solution
    Prokaryotes are the primitive organisms in which a well-defined nucleus is absent. The DNA is present without being enclosed within the nuclear membrane. Such type of arrangement is called nucleiod. They do not have membrane-bound organelles in them. The kingdom Monera solely contains all the prokaryotic organisms.
    A. Mosses belong to plant kingdom and sponges belong to animal kingdom. These are eukaryotic.
    B. Bacteria and blue-green algae are prokaryotes and they belong to the kingdom Monera.
    C. Yeast belongs to kingdom fungi and amoeba belongs to kingdom protista. They are eukaryotic.
    D. Penicillium belongs to kingdom fungi and Spirogyra belongs to kingdom plantae. They are eukaryotic. 
    Hence, the correct answer is 'Bacteria and blue-green algae'
  • Question 3
    1 / -0
    Which of the following organelle forms the intra cellular transporting system?
    Solution
    The endoplasmic reticulum is the organelle responsible for the intracellular transporting system as the ER is formed of extensive network or reticulum of tiny tubular structures which result in the formation of the endomembrane system. Besides transporting the Smooth ER helps in the formation of lipids while the Rough ER results in the formation of proteins.
    So, the correct answer is 'Endoplasmic Reticulum'.
  • Question 4
    1 / -0
    Choose the correct statement regarding Orthodox state of mitochondria
    Solution
    The Orthodox state is the most probable state of the mitochondrion in the cell. The morphological confirmation is even observed in isolated mitochondrion with low respiratory rates(less activity w.r.t. Kreb's cycle, ETS and Oxidative phosphorylation). The state is characterized by increased matrix volume (inner membrane content). So the matrix pushes the inner membrane in close proximity to the outer membrane making outer chamber narrow. In this confirmation the cristae shapes are like that of tubes, the short tubular cristae join to form the lamellar structure. 
    So, considering all the points we find that correct answer to the question is 'Matrix is enlarged while outer chamber is narrow'.
  • Question 5
    1 / -0
    Which of the following cell organelle is regarded as processing plant primarily?
    Solution
    Mitochondria is regarded as processing plant of cell as it helps in producing ATP through respiration. 
    So the answer is "mitochondria".
  • Question 6
    1 / -0
    Intracellular compartments do not occur in 
    Solution
    Intercellular compartments in cell biology comprise all of the closed parts within the cytosol of a eukaryotic cell which can be found in any section of the plant. These do not occur in prokaryotes.
    Thus, the correct answer is 'Prokaryotes.'
  • Question 7
    1 / -0
    Universal cell organelles are
    Solution
    • A polyribosome is also called as ergosomes. It is a complex of an mRNA molecule and two or more ribosomes that act to translate mRNA instructions into polypeptides. 
    • As ribosomes are present in all living organisms i.e both prokaryotic and eukaryotic organisms they are referred to as universal cell organelles. Hence universal cell organelles are Ergosomes.

    So, the correct answer is 'Ergosomes'.
  • Question 8
    1 / -0
    Glycoxidation occurs in
    Solution
    The endoplasmic reticulum is a network of membranous tubules within the cytoplasm of a eukaryotic cell, continuous with the nuclear membrane. In endoplasmic reticulum, the oxidation of sugars, glycolipids and glycoproteins occur which is called as glycoxidation. Hence glycoxidation occurs in endoplasmic reticulum.
    So, the correct answer is 'Endoplasmic reticulum'.
  • Question 9
    1 / -0
    Common features of chloroplast and mitochondria are
    (A) Production of ATP
    (B) $$NADPH_2$$ formation
    (C) Presence of $$70$$S ribosomes
    (D) Presence of Circular naked DNA.
    Solution
    The function of mitochondria: 
    • most important function is to produce energy.
    • production of ATP molecules is known as oxidative phosphorylation.
    • contains the 70S ribosomes. 
    • contain circular DNA.
    The function of chloroplast :
    • production of ATP by photophosphorylation. 
    • production of NADPH2 and evolution of oxygen through the process of photolysis of water. 
    • contains 70S ribosomes. 
    • contain circular DNA. 

     So the correct option is " A, C, D". 
  • Question 10
    1 / -0
    Muscle cells require large amounts of energy to function. Which organelle is found in greater number in muscle cells than in other types of cells because of this large energy requirement?
    Solution
    Muscle cells have a very special characteristic which makes them more effective in the task accomplishing the movement contraction. As you know that all cells to need the energy to function but muscle cells have usually high energy requirement which is only powered by the powerhouse of the cell which is the mitochondria. They convert glucose into ATP which is a molecule that can store large amount of available energy. Muscles have numerous mitochondria so they can quickly and forcefully respond to body's constant demand for energy.

    So, the correct option is 'Mitochondria'
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