9th Class Science The Fundamental Unit of Life Question Bank

done Cell-The Fundamental Unit of Life Total Questions - 20

• question_answer1)
  Robert Hooke is a well-known scientist as he discovered _______.
  A)
   Lysosome                   done clear
  B)
   Vacuole          done clear
  C)
   Cell     done clear
  D)
          Nucleus           done clear
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• question_answer2)
  Cells are of different shapes and sizes. Some cells are irregular in shape such as
  A)
   Amoeba                      done clear
  B)
   Red blood cell done clear
  C)
   Leucocyte       done clear
  D)
          Both (A) and (C) done clear
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• question_answer3)
  When a cell is put in a solution of higher concentration ______ occurs and the cell _____.
  A)
   Endosmosis, swells done clear
  B)
   Exosmosis, shrinks done clear
  C)
   Endosmosis, shrinks done clear
  D)
   Exosmosis, swells        done clear
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• question_answer4)
  Plant cell does not burst in a hypotonic solution because _____.
  A)
   Its cell sap is more concentrated done clear
  B)
   Its cell wall resists bursting done clear
  C)
   Its cell sap is rich in cellulose done clear
  D)
   It does not have lysosomes done clear
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• question_answer5)
  The traffic police of the cell is
  A)
                            done clear
  B)
       done clear
  C)
            done clear
  D)
             done clear
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• question_answer6)
  X is a double membraned organelle that oxidises food present in cell to release energy. X is ________.
  A)
   Nucleus done clear
  B)
   Endoplasmic reticulum done clear
  C)
   Mitochondrion done clear
  D)
   Chloroplast done clear
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• question_answer7)

  Unicellular algae X and Y of the same species were taken and experimentally, chloroplasts were removed from cell X.

  After some time, they both were kept in bright sunlight for few hours and then iodine test was performed on them. What will be the results?

   
  A)
  Both X and V will turn blue-black. done clear
  B)
  Cell X will turn blue-black. done clear
  C)
  Cell Y will turn blue-black. done clear
  D)
  Both X and Y will remain as they originally were. done clear
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• question_answer8)
  Read the following statements carefully. Which of them are true (T) and which of them are false (F)?

  (i)  Granum is the site of dark reaction during photosynthesis, whereas stroma is the site of light reaction during photosynthesis.

  (ii) Lysosomes are formed by the joint activity of endoplasmic reticulum and Golgi complex.

  (iii) Each 70S ribosome consists of a large 50S subunit and a small 30S subunit.

  (iv) The chromosome in which the centromere is near the end and consequently its one arm is very short and the other arm very long, is called acrocentric chromosome.

   
  A)

  (i)	(ii)	(iii)	(iv)
  T	T	F	F

    done clear
  B)

  (i)	(ii)	(iii)	(iv)
  F	T	T	T

    done clear
  C)

  (i)	(ii)	(iii)	(iv)
  F	F	F	T

    done clear
  D)

  (i)	(ii)	(iii)	(iv)
  T	F	T	F

    done clear
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• question_answer9)
  All members of the Gupta family can roll their tongues. Which of the parts labelled in the given figure carries information regarding this characteristic?
  A)
   P                                 done clear
  B)
   Q                    done clear
  C)
   R                     done clear
  D)
          S done clear
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• question_answer10)
  Study the given figure carefully. In which direction the net movement of water will take place?
  A)
   From solution 1 to solution 2 done clear
  B)
   From solution 2 to solution 1 done clear
  C)
   Both (A) or (B) done clear
  D)
   No movement will take place done clear
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• question_answer11)

  These are membrane bound vacuolar organelles discovered by de Duve. They mostly occur in animal cells but they have also been reported in plant cells. They are concerned with the waste disposal system of the cell.

  The cell organelles being referred in the above passage are

  A)
  Mitochondria  done clear
  B)
  Golgi bodies done clear
  C)
  Peroxisomes done clear
  D)
  Lysosomes. done clear
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• question_answer12)
  Which of the following statements is correct for a secretory cell?
  A)
   Golgi apparatus is absent. done clear
  B)
   Rough endoplasmic reticulum is abundantly present in the cell. done clear
  C)
   Only smooth endoplasmic reticulum is present. done clear
  D)
   Secretory granules are formed in nucleus. done clear
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• question_answer13)

  Take a clean glass slide and put few drops of water on it. Now place a complete Rheo leaf on water droplets and examine the cells of leaf under the high power of compound microscope. Put a few drops of concentrated salt/sugar solution on the mounted Rheo leaf on the glass slide. Wait for few minutes and again observe the leaf under the high power of microscope.

  What will be your observation after few minutes?

   
  A)
  Cell contents are separated from the cell wall. done clear
  B)
  Cytoplasm along with plasma membrane has come to lie on one side of cell wall. done clear
  C)
  A clear space is seen between the cell wall and protoplast of the cells. done clear
  D)
  All of these done clear
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• question_answer14)
  Which of the following is correct for the given figure?
  A)
   The part labelled 'b' is called intergranal thylakoid. done clear
  B)
   The part labelled 'c' is called granum. done clear
  C)
   The part labelled 'a' is the site of dark reaction. done clear
  D)
   The parts labelled 'a', 'b' and 'c', all possess photosynthetic pigments such as chlorophyll. done clear
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• question_answer15)
  Find out the incorrect statement.
  A)
   Osmosis is a slow process, occurs down the concentration gradient and does not expend energy. done clear
  B)
   Electron microscope uses very high voltage electricity. It uses electromagnets instead of glass lenses and beam of electrons instead of light. done clear
  C)
   A semipermeable membrane does not allow both solvent and solute molecules to pass through it. done clear
  D)
   Active transport of materials is rapid and usually occurs against the concentration gradient involving carrier proteins and energy in the form of ATP. done clear
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• question_answer16)
  Among the following cell organelles P, Q, R and S, which is the odd one out?  
  A)
   S, because the others are membrane bound cell organelles. done clear
  B)
   P, because the others are involved' in cell secretion. done clear
  C)
   R, because the others are involved in protein storage. done clear
  D)
   Q, because the others are involved in energy production. done clear
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• question_answer17)
  Four strips are cut from a fresh potato. The length of each strip is measured. One strip is placed in water and others in different concentrations of sugar solution. After an hour, the strips were measured again. The results are shown in the table. Which of the liquids P, Q, R and S is water?

  Liquid	Original length of strip (mm)	Final length of strip (mm)
  P	75	75
  Q	78	80
  R	82	80
  S	86	85

  A)
   P                     done clear
  B)
          Q                    done clear
  C)
   R                     done clear
  D)
          S done clear
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• question_answer18)
  A unicellular protist X, which has contractile vacuole to remove excess intracellular water, was placed in salt solution of increasing osmolarity. The given graph shows the rate of contraction of vacuole to pump out excess water against osmolarity of solution.

  Select the option that gives the correct explanation of the data.

   
  A)
  In an isotonic solution there is no diffusion of water in or out of the X, so the contraction rate is zero. done clear
  B)
  At higher osmolarity, more salt diffuses into X, therefore lower rates of contractions are required. done clear
  C)
  The rate of contraction increases as osmolarity decreases because amount of water entering X by osmosis increases. done clear
  D)
  The contractile vacuole is less efficient in solution of high osmolarity because of reduced respiration and less production of ATP. done clear
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• question_answer19)
  Direction: Refer to the given key and answer the following question.

  (i)  Membrane with definite pores - T

  (ii) Inner membrane with stalked particles - Q

  (iii) Inner membrane connected into stacks like structures - R

  (iv) Sac like organelle containing hydrolytic enzymes - S

  (v) Membrane less organelle composed of one large and one small subunit - T

  Select the option that correctly identifies any of these organelles.
  A)
  P - Nucleus, Q - Mitochondrion, S - Ribosome done clear
  B)
  Q - Chloroplast, R - Mitochondrion, T - Ribosome done clear
  C)
  R - Chloroplast, S - Lysosome, T - Ribosome done clear
  D)
  P - Nucleus, Q - Chloroplast, R - Mitochondrion done clear
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• question_answer20)
  Direction: Refer to the given key and answer the following question.

  (i)  Membrane with definite pores - T

  (ii) Inner membrane with stalked particles - Q

  (iii) Inner membrane connected into stacks like structures - R

  (iv) Sac like organelle containing hydrolytic enzymes - S

  (v) Membrane less organelle composed of one large and one small subunit - T

  Select the correct match of organelle and its function.
  A)
   P - Protein synthesis done clear
  B)
  R - Fat synthesis done clear
  C)
  S - Disposal of worn out cells done clear
  D)
  T - Energy production done clear
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