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The Fundamental Unit of Life Test - 29

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The Fundamental Unit of Life Test - 29
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  • Question 1
    1 / -0
    The organelle found in prokaryotic cell is
    Solution
    Prokaryotic cells do not possess membrane bound organelles. It possesses ribosomes which are not bounded by membrane. Ribosomes are necessary for protein synthesis. Hence, option A is correct.

  • Question 2
    1 / -0
    The nucleus is separated from surrounding cytoplasm by a nuclear envelope which is 
    Solution
    • A nuclear membrane, also known as the nuclear envelope, is a double lipid bilayer membrane, which surrounds the nucleus containing genetic material and nucleolus in eukaryotic cells. 
    • The nuclear membrane consists of two lipid bilayers- the inner nuclear membrane and the outer nuclear membrane and consists of pores called nuclear pores for the transportation of DNA, RNA, and proteins. 
    Thus, the correct answer is option B.
  • Question 3
    1 / -0
    Endoplasmic reticulum is absent in?
    Solution
    Prokaryotic cells are primitive cells. Bacteria are prokaryotes. They do not possess many membrane bound organelles as endoplasmic reticulum, mitochondria, lysosomes etc. 
    Therefore, the correct answer is option B. 
  • Question 4
    1 / -0
    Nucleus of a cell
    Solution
    The nucleus controls the functioning of a cell. It is generally located in the center of the cell and is spherical in shape. It has a double-walled membrane which separates it from the cytoplasm. It contains the genetic material DNA and RNA in it. This porous membrane allows the transfer of material in the nucleus and cytoplasm. The nucleus contains chromosomes, which in turn has the genetic material. 
    Hence the correct option is B.
  • Question 5
    1 / -0
    Which of the following would not be considered part of a cell's cytoplasm? 
    Solution
    The nucleus is the largest and important part of the cell. It surrounded by the two layers of membrane. These membranes separates the nuclear content to get mixed with cytoplasm. Cytoplasm is the proteinaceous fluid in the cell which holds organelles like ribosomes, mitochondria, ER etc. Thus, the correct answer is option B.
  • Question 6
    1 / -0
    Which part in the cell is known as a selectively permeable membrane?
  • Question 7
    1 / -0
    The main difference between eukaryotes and prokaryotes is___________ 
    Solution
    Prokaryotes do not possess membrane bound organelles and well defined nucleus. Nucleoid is a region in prokaryotic cell where its most of the genetic material resides. It is not a well-defined membrane bounded region. 
    Eukaryotes possess well defined nucleus and membrane bound organelles as mitochondria, Golgi complex, etc. Nucleus is bound with double membrane in eukaryotic cell in which most of the genetic material is present. 
    Therefore, the correct answer is option A.
  • Question 8
    1 / -0
    Which part of the cell controls all activities of the cell?
  • Question 9
    1 / -0
    Which of the following is a membrane-bound organelle found only in eukaryotic cells and houses the cell's genetic material?
    Solution
    A nucleus is a membrane-bound organelle found in eukaryotic cells. It is enveloped by a double membrane called the nuclear membrane. It contains the cell's genetic material or chromosomes. Pores in the nuclear membrane allow for the passage of molecules in and out of the nucleus. 
    Thus, the correct answer is option A.
  • Question 10
    1 / -0
    Which is useful for the study of a typical plant cell?
    Solution
    An onion is a multicellular (consisting of many cells) plant organism. As in all plant cells, the cell of an onion peel has all the key characteristics of the plant cells such as cell wall, nucleus towards the plasma membrane, prominent and large centrally located vacuole. The presence of a cell wall and a large vacuole are indicators that help identify plant cells, such as seen in the onion peel.
    So, the correct answer is option A.
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