Science and Technology II · Textbook solutions

Life Processes in Living Organisms Part 1

Every solved example, exercise, and miscellaneous question — in the order the textbook teaches them. · 26 questions

Exercise

26 q
  1. Fill in the blanks and explain the statements.
    Ex Q1(a)
    After complete oxidation of a glucose molecules, ……… number of ATP molecules are formed.
  2. Ex Q1(b)
    At the end of glycolysis, ……… molecules are obtained.
  3. Ex Q1(c)
    Genetic recombination occurs in ……… phase of prophase of meiosis-I.
  4. Ex Q1(d)
    All chromosomes are arranged parallel to equatorial plane of cell in ……… phase of mitosis.
  5. Ex Q1(e)
    For formation of plasma membrane, ……… molecules are necessary.
  6. Ex Q1(f)
    Our muscle cells perform ……… type of respiration during exercise.
  7. Write definitions.
    Ex Q2(a)
    Nutrition.
  8. Ex Q2(b)
    Nutrients
  9. Ex Q2(c)
    Proteins.
  10. Ex Q2(d)
    Cellular respiration
  11. Ex Q2(e)
    Aerobic respiration.
  12. Ex Q2(f)
    Glycolysis.
  13. Distinguish between
    Ex Q3(a)
    Glycolysis and TCA cycle.
  14. Ex Q3(b)
    Mitosis and meiosis.
  15. Ex Q3(c)
    Aerobic and anaerobic respiration.
  16. Give scientific reasons.
    Ex Q4(a)
    Oxygen is necessary for complete oxidation of glucose.
  17. Ex Q4(b)
    Fibers are one of the important nutrients.
  18. Ex Q4(c)
    Cell division is one of the important properties of cells and organisms.
  19. Ex Q4(d)
    Sometimes, higher plants and animals too perform anaerobic respiration.
  20. Ex Q4(e)
    Krebs cycle is also known as citric acid cycle.
  21. Answer in detail.
    Ex Q5(a)
    Explain the glycolysis in detail.
  22. Ex Q5(b)
    With the help of suitable diagrams, explain the mitosis in detail.
  23. Ex Q5(c)
    With the help of suitable diagrams, explain the five stages of prophase-I of meiosis.
  24. Ex Q5(d)
    How all the life processes contribute to the growth and development of the body?
  25. Ex Q5(e)
    Explain the Krebs cycle with reaction.
  26. Ex Q5(II)
    How energy is formed from oxidation of carbohydrates, fats and proteins? Correct the diagram given below. In the printed flow chart the arrows run upwards from the bottom row. Reading from the bottom up, the boxes carry:
    Position in the chartPrinted inside the box
    Bottom row, leftProteins
    Bottom row, middlekrebs cycle
    Bottom row, rightFats
    Second row, leftLipid
    Second row, middleGlycolysis
    Second row, rightAmino acids
    Third row, above Glycolysis(blank)
    Fourth row, spanning the chart — the left and right columns also feed into itAcetyl Co-Enzyme A
    Fifth row(blank)
    Top rowPyruvic Acid