JAMB Biology questions: Cellular activities

32 questions with answers and explanations. Tap an option to check yourself.

1. Question 21· Cellular activities· JAMB

   Crossing over between homologous chromosomes occurs during

   • Aanaphase II of meiosis
   • Bmetaphase of mitosis
   • Cprophase I of meiosis
   • Dtelophase of mitosis

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2. Question 22· Cellular activities· JAMB

   Turgidity of plant cells helps to

   • Akill the cells
   • Breduce photosynthesis
   • Csupport non-woody plants
   • Dcause wilting

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3. Question 23· Cellular activities· JAMB

   A human cell with 46 chromosomes undergoes meiosis. Each cell produced has

   • A46 chromosomes
   • B23 chromosomes
   • C92 chromosomes
   • D12 chromosomes

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4. Question 24· Cellular activities· JAMB

   Plasmolysis of a plant cell occurs when it is placed in a

   • Ahypotonic solution
   • Bhypertonic solution
   • Cisotonic solution
   • Dpure water

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5. Question 25· Cellular activities· JAMB

   The stage of mitosis at which chromosomes line up at the equator of the cell is:

   • Aprophase
   • Banaphase
   • Cmetaphase
   • Dtelophase

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6. Question 26· Cellular activities· JAMB

   Meiosis takes place during the

   • Ahealing of bones
   • Brepair of wounds
   • Cgrowth of roots
   • Dformation of gametes

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7. Question 27· Cellular activities· JAMB

   The stage of mitosis at which the chromatids separate and move to opposite poles is

   • Aanaphase
   • Bprophase
   • Cmetaphase
   • Dtelophase

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8. Question 28· Cellular activities· JAMB

   Each enzyme acts on only one substrate or type of substrate. This shows that enzymes are

   • Aunaffected by heat
   • Bproteins
   • Cused up
   • Dspecific

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9. Question 29· Cellular activities· JAMB

   Phagocytosis is

   • Athe engulfing of solid particles by a cell
   • Bthe uptake of water
   • Cgaseous exchange
   • Dcell division

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10. Question 30· Cellular activities· JAMB

    Pinocytosis is the intake of

    • Asolid particles by a cell
    • Bliquid droplets by a cell
    • Clight by chloroplasts
    • Doxygen by diffusion

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11. Question 31· Cellular activities· JAMB

    A strip of potato placed in a strong sugar solution for an hour becomes

    • Alonger and firmer
    • Bshorter and softer
    • Cunchanged
    • Dburst

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12. Question 32· Cellular activities· JAMB

    The enzyme amylase converts

    • Afats to fatty acids
    • Bproteins to amino acids
    • Cstarch to maltose
    • Dmaltose to glucose

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    Explanation and discussion