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Cell Structure and Functions Test - 26

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Cell Structure and Functions Test - 26
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  • Question 1
    1 / -0
    Vacuole is present in:
    Solution
    A vacuole is a membrane-bound cell organelle. The vacuole is found in both plant and animal cells. In animal cells, vacuoles are small and many in number. In a plant cell, a single, big vacuole is present.
    So, the correct answer is option C.
  • Question 2
    1 / -0
    Identify P, Q, and R from the information given.
    P-A colorless liquid-like jelly substance
    Q-Maintains the shape of a cell
    R-Contains genetic information
    PQR
    (A)NucleusCell wallCytoplasm
    (B)Cell wallCytoplasmNucleus
    (C)NucleusCytoplasmCell wall
    (D)CytoplasmCell wallNucleus
    Solution
    • The label P refers to the cytoplasm which is the jelly-like matrix in the cell. 
    • The label Q is the cell wall that is responsible for maintaining the shape and integrity of the cell. 
    • The label R is the nucleus which acts as the controlling center of the cell. The genetic information in the form of DNA is present in the nucleus. 
    Thus, the correct answer is option D. 
  • Question 3
    1 / -0
    The information given in the box is about the organelles present in a cell.
    Which of them are absent in animal cells?

    Solution
    The plants and the animal cells are eukaryotic cells which are composed of well-developed cell organelles. The animal cell can be differentiated from the plant cell due to the absence of certain structures in the cell. The cell wall is absent in the animal's cells and they have only the cell membrane. The chloroplast is absent in animal cells. Cytoplasm and nucleus are present in both plant and animal cells. 
    Thus, the correct answer is option C. 
  • Question 4
    1 / -0
    Which of the following are present only in plant cells?
    I. A nucleus   II. A cell wall   III. A cell membrane  IV. Cytoplasm  V. Chloroplasts.
    Solution
    Plant cells have cell wall. It provides rigidity to the plant. Animals lack cell wall.
    Chloroplast is present in plant cells and is involved in photosynthesis. Hence plants are said to be autotrophs. Animal cells lack chloroplast and are heterotrophs. 
    Thus the correct answer is option A.
  • Question 5
    1 / -0
    Which one of the following lists the structures which are present both in animal and plant cells?
    Solution
    The plant and animal cells are eukaryotic and contain well developed cellular organelles. The cell membrane, cytoplasm, chromosomes, and mitochondria are the structures which are present in both the plant and the animal cells. The cell wall and chloroplast are present only in the plant cell. 
    Thus, the correct answer is option B. 
  • Question 6
    1 / -0
    Which cell organelle is absent in an animal cell?
    Solution
    Plants are eukaryotes with cell wall. Cell wall provides rigidity to plants. Animals lack cell wall. 
    Plant cells have large vacuoles that occupy a major portion of the cell. Vacuoles provide strength and mechanical support to the plant cell. Animal cells have small vacuoles. 
    Thus the correct answer is option D.

  • Question 7
    1 / -0
    Which organelle is absent in animal cell?
    Solution
    • The chloroplast is a plastid which contains chlorophyll (green pigment) within the thylakoid membranes of the organelle.
    • This organelle is present in the green parts of plants where photosynthesis takes place.
    • The chlorophyll pigment captures the sunlight and converts it into chemical energy and thus, helps in the process of photosynthesis.
    • This organelle is absent in an animal cell.
    • So, the correct answer is 'Chloroplasts'.
  • Question 8
    1 / -0
    Cell organelles are embedded in:
    Solution
    Cytoplasm is the jelly-like substance present between the cell membrane and the nucleus. Various other components, or organelles, of cells are present in the cytoplasm. These are mitochondria, Golgi bodies, ribosomes, etc.
    So, the correct answer is 'Cytoplasm'.
  • Question 9
    1 / -0
    Cell can be described as:
    Solution
    Correct Answer: D
    Explanation:
    • A cell can be defined as the structural and functional unit of life.
    • It is because the cell is the smallest functional group that can exist independently all by itself.
    • It is the smallest unit that forms all other structures in an organism.
    • All the metabolic reactions occur in the cell, which provides energy to the organism for living.
    Hence, the correct answer is All of the above.
  • Question 10
    1 / -0
    Schleiden (1838) proposed cell to be structural and functional unit of life. His idea was a/an:
    Solution
    The term hypothesis means a proposition or a set of propositions set forth as an explanation for the occurrence of some specific phenomenon. In this case, the phenomenon was smallest constituent entity of living organisms. In 1838, German Botanist Matthias Schleiden found that all plant tissues are made up of cells which have essentially similar structure. German zoologist Theodor Schwann in 1839, working independently observed that animal cells do not have cell wall but are otherwise similar among themselves. Thus, the original idea of both the workers was a hypothesis based on their observation, which had to be experimentally verified by other workers.
    Hence, 'D' is the correct option. 
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