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Cell The Unit of Life Test - 36

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Cell The Unit of Life Test - 36
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  • Question 1
    1 / -0
    Most of the cell organelles are derived from
    Solution
    The endoplasmic reticulum is a network of a tube like structure called as cisternae. It is membrane-bound organelle and attached to the outer membrane of the nucleus. It helps in the synthesis of biomolecules like proteins and lipids. Most of the cell organelles are derived from it.
  • Question 2
    1 / -0
    The endoplasmic reticulum is present in
    Solution
    The endoplasmic reticulum is the endomembrane system and presents in the cytoplasm. The general structure of the endoplasmic reticulum is a network of membranes called as cisternae. These sac-like structures are held together by the cytoskeleton. 
  • Question 3
    1 / -0
    E.R. is not related with
    Solution
    The endoplasmic reticulum is not related to mitochondria because they both are different wit respect to their structure as well as function. Mitochondria is present in aerobic organisms only, produces and stores energy in the form of ATP. whereas E.R. present in all eukaryotic cells and involved in the formation and transportation of proteins and lipids.  
  • Question 4
    1 / -0
    Mitochondria originated from which of the following organism?
    Solution

    According to the endosymbiotic hypothesis, mitochondria was evolved by purple bacteria and survived endocytosis by another bacteria.

  • Question 5
    1 / -0
    Which cell organelle reduces the number of endoplasmic reticulum and mitochondria?
    Solution
    Lysosomes are the smallest single membrane bound organelles that contain acid hydrolase enzymes that break down waste materials and cellular debris. Lysosomes digest excess or worn-out organelles such as endoplasmic reticulum and mitochondria, food particles, and engulfed viruses or bacteria. 
  • Question 6
    1 / -0
    ....................  is a cell organelle that is rich in hydrolases enzyme.
    Solution
    Lysosomes are the smallest cellular organelles that contain acid hydrolase enzymes that digest the waste materials and cellular debris. They can be described as the stomach of the cell. Lysosomes digest excess or worn-out organelles, food particles, and engulfed viruses or bacteria. The membrane around a lysosome allows the digestive enzymes to work at the pH they require. 
  • Question 7
    1 / -0
    Osteogenesis and removal of dead cells are function of
    Solution
    Osteogenesis (breaking of fragile bones) and removal of dead cells are the functions of lysosomes. Lysosomes are abundantly found in the phagocytic cell. It is a membrane-bound cell organelle found in most animal cells. They are structurally and chemically spherical vesicles containing hydrolytic enzymes, which are capable of breaking down virtually all kinds of biomolecules, including proteins, nucleic acids, carbohydrates, lipids, and cellular debris. Lysosomes are interlinked with three intracellular processes namely phagocytosis, endocytosis and autophagy.
  • Question 8
    1 / -0
    Ribosomes are composed of

    Solution
    Ribosomes are 62% RNA and 38% protein formed into two complexes in prokaryotes, the 50S ribosome subunit and the 30S ribosome subunit.
    Ribosome associated proteins are positively charged. This helps them to bind to the negatively charged mRNA.
  • Question 9
    1 / -0
    The name mitochondria was first given by
    Solution
    The term "mitochondria" was coined by carl benda in 1898. They were earlier traced and considered as organelle by Richard Altmann, in 1894 as "bioblasts".
  • Question 10
    1 / -0
    The enzymes are synthesized in an organelle known as
    Solution
    Enzymes are the biocatalyst which are proteinaceous in nature. These are synthesized by the ribosomes located on endoplasmic reticulum. Ribosomes are known as "protein factory" of a cell.
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