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Cell - The Unit of Life Test - 6

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Cell - The Unit of Life Test - 6
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Weekly Quiz Competition
  • Question 1
    4 / -1

    Which one of the following has its own DNA?

    Solution

    In mitochondria, the inner membrane space is filled with a matrix which contains dense granules  along  with  ribosomes  and mitochondrial DNA. The mitochondrial DNA is circular in nature. There number varies from 2-6. Besides DNA, a mitochondrion has RNA and its ribosomes also. Thus, a complete protein synthesizing machinery is present in mitochondria, which suggests  the semi-autonomous nature of mitochondria. Dictyosome, lysosome and peroxisome do not have their own DNA.

  • Question 2
    4 / -1

    Chlorophyll in chloroplasts is located in

    Solution

    Correct Answer :- c

    Explanation : Chloroplasts are structurally made up of two components- thylakoids (internal membrane structures) and stroma. Some of the thylakoid membranes are stacked one above the other and are called as grana. The grana contain light trapping pigment chlorophyll and are thus the site of light reaction.

  • Question 3
    4 / -1

    Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on

    Solution

    Chemiosmosis occurs in mitochondria and chlorplast. The electron transport chain forms a proton gradient across the inner mitochondrial membrane, which is major force needed for the synthesis of ATP.

    While, accumulation of sodium ions, potassium ions and membrane potential are needed for transport of nutrients or impulses across membrane and not for ATP synthesis.

  • Question 4
    4 / -1

    Carbohydrates, the most abundant biomolecules on Earth, are produced by

    Solution

    Carbohydrates are organic compounds synthesized in the chlorophyll containing cells of some bacteria,-algae and green plant cells, during photosynthesis. Certain photoautotrophic bacteria eg. Green sulphur bacteria and purple sulphur bacteria contain pigments like chlorobium chlorophyll and bacteriochlorophyll respectively that helps them in photosynthesis. During photosynthesis carbon dioxide is reduced into carbohydrates by water and oxygen is liberated.

  • Question 5
    4 / -1

    The cell organelle associated with intercellular digestion of macromolecules is

    Solution

    Lysosome is help breakdown of big molecules into smaller one.

  • Question 6
    4 / -1

    The membrane around the vacuole is called

  • Question 7
    4 / -1

    The organelle associated with aerobic respiration is

  • Question 8
    4 / -1

    A single unit membrane surrounds the organelle:

    Solution

    Chloroplast and nucleus are double membranemicrosome is non membrane only lysosome has single membrane.

  • Question 9
    4 / -1

    Lysosomes contain

  • Question 10
    4 / -1

    Small particles projecting from the inner membrane and cristae of mitochondria are

    Solution

    Oxysomes are the structure present in the inner surface of mitochondra.it is also known as f0-f1particle or Atp synthese.oxysomes play an important role in formation energy for the functioning of the cell.oxysome help in the electron transport i.e oxidation and reduction rxn in respiration.

  • Question 11
    4 / -1

    Which of the following cell organelles store hydrolytic enzymes?

  • Question 12
    4 / -1

    The core metal of chlorophyll is

    Solution

    The empirical formula of chlorophyll molecule is C55H7205N4Mg. It has tadpole like configuration. It is consisted of a porphyrin head and a phytol tail. Porphyrin is a cyclic tetrapyrol structure, having a magnesium atom in the centre. Chlorophyll a methyl group (CH3) is attached to the third carbon in the porphyrin head.

  • Question 13
    4 / -1

    Acid hydrolase is found in

    Solution

    Lysosomes are rich in almost all types of hydrolases(lipases,professes,carbohydrates) and these are optimally active at acidic pH.....(refer ncert pg no. 134)....

  • Question 14
    4 / -1

    Cristae are associated with which of the following?

    Solution

    Cristae is the inner membrane foldings in mitochondria. It is the finger-like projection of the inner mitochondrial membrane provide the site for ATP synthesis.

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