Cell Structure, Microscopy, Magnification and Cell Specialisation

1. A student observes a cell under a light microscope. The cell has a nucleus, cytoplasm, cell membrane and many small green structures. It does not have a visible cell wall.
   Which conclusion is most valid?

A The cell is definitely an animal cell because no cell wall is visible.
B The cell is definitely a plant cell because chloroplasts are present.
C The cell is definitely a bacterium because it contains cytoplasm.
D The cell is definitely a virus because it has no cell wall.

2. A drawing of a cell is 72 mm long. The actual cell is 0.018 mm long.
   What is the magnification of the drawing?

A ×40
B ×400
C ×4000
D ×40 000

3. Which structure is present in both a bacterial cell and a plant cell, but not in a virus?

A DNA
B cytoplasm
C protein coat
D genetic material

4. A student makes the following observations about an unknown cell.

1 It contains DNA.
2 It has ribosomes.
3 It has a cell wall.
4 It has no nucleus.

Which type of cell is most likely being observed?

A animal cell
B bacterial cell
C palisade mesophyll cell
D fungal cell

5. Which row correctly compares a root hair cell and a red blood cell?

A root hair cell has no nucleus; red blood cell has a large vacuole
B root hair cell has a large surface area; red blood cell has haemoglobin
C root hair cell contains chloroplasts; red blood cell contains mitochondria
D root hair cell transports oxygen; red blood cell absorbs mineral ions

6. A microscope eyepiece lens is ×10 and the objective lens is ×40. The image seen is 0.80 mm wide.
   What is the actual width of the specimen?

A 0.002 mm
B 0.020 mm
C 0.20 mm
D 20 mm

7. A cell contains a nucleus, mitochondria, ribosomes and a cell membrane. It does not contain a cell wall or chloroplasts.
   Which specialised cell could it be?

A mature xylem vessel
B mature red blood cell
C liver cell
D bacterial cell

8. Which statement about ribosomes is correct?

A They are only found in animal cells.
B They are the site of protein synthesis.
C They control all cell activities by containing chromosomes.
D They release energy by aerobic respiration.

9. Which cell structure is correctly matched with its function?

A cell membrane: fully prevents substances entering the cell
B mitochondrion: controls which genes are inherited
C chloroplast: site of photosynthesis
D vacuole: site of protein synthesis

10. A student measures an image of a mitochondrion as 48 mm. The magnification is ×12 000.
    What is the actual length of the mitochondrion?

A 0.004 mm
B 0.04 mm
C 0.4 mm
D 4 mm

11. Which feature is found in plant cells and fungal cells but not animal cells?

A chloroplast
B cellulose cell wall
C cell wall
D sap vacuole

12. Which structure allows a plant cell to become turgid without bursting?

A cell membrane
B cell wall
C cytoplasm
D nucleus

Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 11 World Records and 7 Distinctions, Educate A Change.

13. A student observes a cell with no visible nucleus under a light microscope.
    Which conclusion is safest?

A It must be a bacterium.
B It must be a mature red blood cell.
C It may be a cell whose nucleus cannot be seen clearly.
D It must be a virus.

14. Which cell is most likely to contain many mitochondria?

A mature xylem vessel
B root hair cell
C mature red blood cell
D dead cork cell

15. Which comparison between a bacterial cell and an animal cell is correct?

A Both have circular DNA in a nucleus.
B Both have a cell wall made of cellulose.
C Both have cytoplasm and ribosomes.
D Both contain mitochondria for aerobic respiration.

16. A diagram of a cell is 5.6 cm across. The actual cell is 140 µm across.
    What is the magnification?

A ×4
B ×40
C ×400
D ×4000

17. Which specialised cell is correctly matched with its adaptation?

A sperm cell: large food store for germination
B ciliated cell: long extension for absorbing water
C palisade cell: many chloroplasts for photosynthesis
D xylem vessel: haemoglobin for oxygen transport

18. A specimen is 25 µm wide. A student draws it 10 cm wide.
    What is the magnification?

A ×40
B ×400
C ×4000
D ×40 000

19. Which statement correctly describes the function of the nucleus?

A It controls cell activities and contains chromosomes.
B It releases energy during respiration.
C It controls movement of substances into and out of the cell.
D It is the site where glucose is made during photosynthesis.

20. A cell has a permanent vacuole, chloroplasts and a cellulose cell wall.
    Which cell could it be?

A palisade mesophyll cell
B mature red blood cell
C sperm cell
D bacterial cell

21. Which row correctly shows structures found in a typical plant cell?

A cell wall, chloroplast, nucleus, mitochondria
B cell wall, chloroplast, nucleus, plasmid
C cell wall, protein coat, nucleus, mitochondria
D cell membrane, capsid, ribosome, chloroplast

22. Why is a root hair cell efficient at absorption?

A It has many chloroplasts to provide glucose.
B It has a long projection giving a large surface area.
C It has no cell wall so water enters easily.
D It has haemoglobin to bind mineral ions.

23. Which feature explains why xylem vessels are suitable for water transport?

A They are living cells with many nuclei.
B They contain biconcave discs.
C They are hollow dead tubes with lignified walls.
D They have cilia to move water upwards.

24. A student uses a microscope with an eyepiece lens of ×15 and an objective lens of ×20.
    The image diameter is 9.0 mm.
    What is the actual diameter of the specimen?

A 0.003 mm
B 0.030 mm
C 0.30 mm
D 30 mm

Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 11 World Records and 7 Distinctions, Educate A Change.

25. Which statement about viruses is correct?

A They have cytoplasm but no nucleus.
B They have ribosomes but no mitochondria.
C They contain genetic material inside a protein coat.
D They are cells with cell membranes and plasmids.

26. Which structure is found in plant, animal and bacterial cells?

A chloroplast
B cell membrane
C nucleus
D mitochondrion

27. A student observes a structure with a cell wall, cell membrane, cytoplasm, ribosomes and a single loop of DNA.
    Which missing structure would confirm it is not a plant cell?

A mitochondrion
B nucleus
C ribosome
D cell membrane

28. Which sequence correctly shows increasing level of organisation?

A cell → organ → tissue → organ system
B tissue → cell → organ → organism
C cell → tissue → organ → organ system
D organ → tissue → cell → organism

29. A drawing is magnified ×250. The actual length of the specimen is 0.32 mm.
    What is the length of the drawing?

A 0.80 mm
B 8.0 mm
C 80 mm
D 800 mm

30. Which cell is least likely to contain a nucleus when fully specialised?

A ciliated epithelial cell
B root hair cell
C mature red blood cell
D palisade mesophyll cell

31. Which statement about mitochondria is correct?

A They are the site of aerobic respiration.
B They are absent from all plant cells.
C They contain chlorophyll.
D They are found in viruses.

32. A student says, “All cells have a nucleus because all cells contain DNA.”
    Why is this statement wrong?

A DNA is only found in animal cells.
B Some cells have DNA but no nucleus.
C Plant cells contain chromosomes but no DNA.
D Viruses have nuclei but no DNA.

33. Which adaptation helps a sperm cell carry out its function?

A no nucleus to increase space for oxygen
B tail for movement towards the egg cell
C chloroplasts to produce energy for swimming
D cell wall to protect it in the female reproductive system

34. Which cell structure is directly responsible for controlling the movement of mineral ions into a root hair cell?

A cell membrane
B cell wall
C vacuole
D nucleus

35. A student views an object using an eyepiece lens of ×10 and an objective lens of ×5. The actual object is 0.6 mm long.
    How long will the image appear?

A 3 mm
B 30 mm
C 60 mm
D 300 mm

36. Which row correctly identifies where DNA may be found?

A animal cell: nucleus only; bacterium: nucleus only
B animal cell: nucleus; bacterium: cytoplasm
C animal cell: cytoplasm only; bacterium: mitochondria
D animal cell: cell membrane; bacterium: chloroplast

Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 11 World Records and 7 Distinctions, Educate A Change.

37. Which statement about a palisade mesophyll cell is correct?

A It is adapted for photosynthesis by having many chloroplasts.
B It has no vacuole so that more chloroplasts can fit inside.
C It lacks a cell wall to allow carbon dioxide to diffuse quickly.
D It is found in roots where light intensity is highest.

38. A cell is 80 µm long. In a drawing, it is shown as 16 cm long.
    What is the magnification?

A ×20
B ×200
C ×2000
D ×20 000

39. Which feature distinguishes a plant cell from a bacterial cell?

A presence of cytoplasm
B presence of ribosomes
C presence of a cell membrane
D presence of a nucleus

40. Which structure is found in a fungal cell but not in a typical animal cell?

A nucleus
B cell membrane
C cell wall
D cytoplasm

41. A student identifies a cell as a xylem vessel because it has thick walls and no cytoplasm.
    Which additional observation would best support this identification?

A It contains haemoglobin.
B It contains a large number of chloroplasts.
C It forms a hollow tube for water movement.
D It has a tail for movement.

42. Which statement correctly compares magnification and resolution?

A Magnification is the ability to distinguish two close points; resolution is image enlargement.
B Magnification and resolution both mean image enlargement.
C Magnification is image enlargement; resolution is the ability to distinguish two close points.
D Resolution only applies to drawings, not microscopes.

43. Which structure is present in both plant and animal cells and is involved in protein synthesis?

A ribosome
B chloroplast
C cell wall
D sap vacuole

44. An object is viewed at ×600 magnification. Its image is 36 mm long.
    What is the actual length of the object?

A 0.006 mm
B 0.06 mm
C 0.6 mm
D 6 mm

45. Which cell is adapted to move substances over its surface?

A ciliated epithelial cell
B root hair cell
C palisade mesophyll cell
D red blood cell

46. A student compares three cells.

Cell X: has a cell wall, chloroplasts and nucleus
Cell Y: has a cell wall, circular DNA and ribosomes
Cell Z: has a cell membrane, nucleus and mitochondria only

Which row identifies X, Y and Z?

A X plant, Y bacterium, Z animal
B X bacterium, Y plant, Z animal
C X plant, Y animal, Z bacterium
D X animal, Y bacterium, Z plant

47. Which statement about a mature red blood cell is correct?

A It has a nucleus to control haemoglobin production.
B It has no nucleus, allowing more space for haemoglobin.
C It has chloroplasts to provide energy for oxygen transport.
D It has a cell wall to resist pressure in arteries.

48. A microscope has a total magnification of ×1000. The eyepiece lens is ×25.
    What is the magnification of the objective lens?

A ×4
B ×25
C ×40
D ×975

Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 11 World Records and 7 Distinctions, Educate A Change.

49. Which row correctly shows a structure and a cell where it is definitely absent?

A nucleus: mature red blood cell
B cell membrane: animal cell
C ribosome: bacterial cell
D mitochondrion: liver cell

50. A student observes a microscopic structure with genetic material but no cytoplasm, no ribosomes and no cell membrane.
    What is the best identification?

A bacterium
B virus
C fungus
D animal cell

1. Answer: B
   A is wrong because lack of a visible cell wall does not prove it is animal; the wall may not be clearly seen.
   B is correct because chloroplasts are strong evidence of a photosynthetic plant-type cell.
   C is wrong because bacteria do not have a true nucleus or chloroplasts.
   D is wrong because viruses are not cells and do not have cytoplasm or chloroplasts.

2. Answer: C
   Magnification = image size ÷ actual size = 72 mm ÷ 0.018 mm = ×4000.
   A and B are too small because they result from incorrect division/place value.
   D is too large by a factor of 10.

3. Answer: B
   A is wrong because some viruses contain DNA, so DNA is not enough to exclude viruses.
   B is correct because cytoplasm is found in bacterial and plant cells but not in viruses.
   C is wrong because protein coats are typical of viruses, not plant cells.
   D is wrong because “genetic material” can be found in viruses too.

4. Answer: B
   A is wrong because animal cells do not have a cell wall.
   B is correct because bacteria have DNA, ribosomes, cell walls and no nucleus.
   C is wrong because palisade cells have a nucleus and chloroplasts.
   D is wrong because fungal cells usually have a nucleus.

5. Answer: B
   A is wrong because root hair cells usually have a nucleus, while red blood cells do not have a vacuole.
   B is correct because root hair cells have a large surface area for absorption and red blood cells contain haemoglobin for oxygen transport.
   C is wrong because root hair cells usually lack chloroplasts and mature red blood cells lack mitochondria.
   D is wrong because those functions are reversed/incorrect.

6. Answer: A
   Total magnification = ×10 × ×40 = ×400.
   Actual size = image size ÷ magnification = 0.80 mm ÷ 400 = 0.002 mm.
   B, C and D are too large due to incorrect division or place value.

7. Answer: C
   A is wrong because mature xylem vessels are dead and do not contain cytoplasm or nuclei.
   B is wrong because mature red blood cells have no nucleus or mitochondria.
   C is correct because liver cells are animal cells with nucleus, mitochondria, ribosomes and cell membrane.
   D is wrong because bacterial cells do not have a true nucleus or mitochondria.

8. Answer: B
   A is wrong because ribosomes are found in plant, animal and bacterial cells.
   B is correct because ribosomes are the site of protein synthesis.
   C is wrong because the nucleus controls cell activities and contains chromosomes.
   D is wrong because mitochondria release energy during aerobic respiration.

9. Answer: C
   A is wrong because the cell membrane is partially permeable; it does not fully prevent movement.
   B is wrong because mitochondria are not responsible for inheritance control.
   C is correct because chloroplasts are the site of photosynthesis.
   D is wrong because ribosomes, not vacuoles, are the site of protein synthesis.

10. Answer: A
    Actual size = image size ÷ magnification = 48 mm ÷ 12 000 = 0.004 mm.
    B, C and D are too large because the magnification has not been applied correctly.

11. Answer: C
    A is wrong because fungal cells do not contain chloroplasts.
    B is wrong because fungal cell walls are not made of cellulose.
    C is correct because plant and fungal cells both have cell walls, while animal cells do not.
    D is wrong because a large sap vacuole is typical of plant cells, not fungal cells in the same way.

12. Answer: B
    A is wrong because the cell membrane alone cannot stop bursting.
    B is correct because the cell wall resists turgor pressure.
    C is wrong because cytoplasm does not provide strong mechanical support.
    D is wrong because the nucleus controls activities but does not stop bursting.

Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 11 World Records and 7 Distinctions, Educate A Change.

13. Answer: C
    A is wrong because absence of a visible nucleus does not automatically prove it is a bacterium.
    B is wrong because it could be a mature red blood cell, but this is not certain.
    C is correct because the safest conclusion is that the nucleus may simply not be visible.
    D is wrong because viruses cannot normally be observed clearly as cells under a light microscope.

14. Answer: B
    A is wrong because mature xylem vessels are dead and do not contain mitochondria.
    B is correct because root hair cells need many mitochondria for active transport of mineral ions.
    C is wrong because mature red blood cells lack mitochondria.
    D is wrong because dead cork cells do not need many mitochondria.

15. Answer: C
    A is wrong because bacteria do not have circular DNA inside a nucleus.
    B is wrong because animal cells do not have cell walls, and bacterial walls are not cellulose.
    C is correct because both bacterial and animal cells have cytoplasm and ribosomes.
    D is wrong because bacteria do not have mitochondria.

16. Answer: C
    Image size = 5.6 cm = 56 mm = 56 000 µm.
    Magnification = 56 000 µm ÷ 140 µm = ×400.
    A and B are too small; D is too large.

17. Answer: C
    A is wrong because sperm cells do not have a large food store for germination.
    B is wrong because ciliated cells move mucus/particles, not absorb water using long extensions.
    C is correct because palisade cells contain many chloroplasts for photosynthesis.
    D is wrong because xylem vessels do not contain haemoglobin.

18. Answer: C
    Image size = 10 cm = 100 mm = 100 000 µm.
    Magnification = 100 000 µm ÷ 25 µm = ×4000.
    A and B are too small; D is too large.

19. Answer: A
    A is correct because the nucleus controls cell activities and contains chromosomes.
    B is wrong because mitochondria release energy.
    C is wrong because the cell membrane controls movement in and out.
    D is wrong because chloroplasts make glucose in photosynthesis.

20. Answer: A
    A is correct because palisade mesophyll cells have chloroplasts, a cellulose cell wall and a permanent vacuole.
    B is wrong because mature red blood cells lack chloroplasts, cell wall and vacuole.
    C is wrong because sperm cells are animal cells.
    D is wrong because bacteria do not have chloroplasts or a true cellulose plant cell wall.

21. Answer: A
    A is correct because a typical plant cell has a cell wall, chloroplasts, nucleus and mitochondria.
    B is wrong because plasmids are typical of bacteria, not plant cells.
    C is wrong because a protein coat/capsid is viral.
    D is wrong because capsid is viral and animal/plant cells do not have capsids.

22. Answer: B
    A is wrong because root hair cells are underground and usually do not contain chloroplasts.
    B is correct because the long root hair gives a large surface area for absorption.
    C is wrong because root hair cells have cell walls.
    D is wrong because haemoglobin is found in red blood cells, not root hair cells.

23. Answer: C
    A is wrong because xylem vessels are dead at maturity and do not have many nuclei.
    B is wrong because biconcave discs describe red blood cells.
    C is correct because xylem vessels are hollow dead tubes with lignified walls for water transport and support.
    D is wrong because cilia do not move water up xylem.

24. Answer: B
    Total magnification = ×15 × ×20 = ×300.
    Actual size = 9.0 mm ÷ 300 = 0.030 mm.
    A is too small; C and D are too large.

25. Answer: C
    A is wrong because viruses do not have cytoplasm.
    B is wrong because viruses do not have ribosomes.
    C is correct because viruses contain genetic material inside a protein coat.
    D is wrong because viruses are not cells with cell membranes and plasmids.

Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 11 World Records and 7 Distinctions, Educate A Change.

26. Answer: B
    A is wrong because chloroplasts are not found in animal or bacterial cells.
    B is correct because plant, animal and bacterial cells all have cell membranes.
    C is wrong because bacteria do not have a true nucleus.
    D is wrong because bacteria do not have mitochondria.

27. Answer: B
    A is wrong because absence of mitochondria alone suggests bacterium, but the strongest plant-cell exclusion is no nucleus.
    B is correct because plant cells have a nucleus, while bacteria have DNA free in the cytoplasm.
    C is wrong because both bacteria and plant cells have ribosomes.
    D is wrong because both bacteria and plant cells have cell membranes.

28. Answer: C
    A is wrong because tissues come before organs.
    B is wrong because cells are the basic unit and come before tissues.
    C is correct: cell → tissue → organ → organ system.
    D is wrong because organs are not smaller than tissues or cells.

29. Answer: C
    Image size = actual size × magnification = 0.32 mm × 250 = 80 mm.
    A and B are too small; D is too large.

30. Answer: C
    A is wrong because ciliated epithelial cells have nuclei.
    B is wrong because root hair cells have nuclei.
    C is correct because mature red blood cells lose their nucleus.
    D is wrong because palisade mesophyll cells have nuclei.

31. Answer: A
    A is correct because mitochondria are the site of aerobic respiration.
    B is wrong because plant cells also have mitochondria.
    C is wrong because chloroplasts contain chlorophyll.
    D is wrong because viruses do not have mitochondria.

32. Answer: B
    A is wrong because DNA is found in plant, animal and bacterial cells, and in many viruses.
    B is correct because bacteria have DNA but no nucleus, and mature red blood cells lose the nucleus.
    C is wrong because chromosomes contain DNA.
    D is wrong because viruses do not have nuclei.

33. Answer: B
    A is wrong because sperm cells have a nucleus carrying genetic material.
    B is correct because the tail helps the sperm swim towards the egg.
    C is wrong because sperm cells do not have chloroplasts.
    D is wrong because sperm cells are animal cells and do not have cell walls.

34. Answer: A
    A is correct because the cell membrane controls movement of substances into and out of the cell.
    B is wrong because the cell wall is freely permeable and mainly provides support.
    C is wrong because the vacuole stores cell sap.
    D is wrong because the nucleus controls cell activities but is not the membrane barrier.

35. Answer: B
    Total magnification = ×10 × ×5 = ×50.
    Image size = actual size × magnification = 0.6 mm × 50 = 30 mm.
    A is too small; C and D are too large.

36. Answer: B
    A is wrong because bacteria do not have a nucleus.
    B is correct because animal cells have DNA in the nucleus, while bacteria have DNA in the cytoplasm.
    C is wrong because animal DNA is not only in cytoplasm and bacteria do not have mitochondria.
    D is wrong because DNA is not mainly found in cell membranes or bacterial chloroplasts.

37. Answer: A
    A is correct because palisade mesophyll cells contain many chloroplasts for photosynthesis.
    B is wrong because palisade cells usually have a vacuole.
    C is wrong because palisade cells have cell walls.
    D is wrong because palisade cells are in leaves, not roots.

Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 11 World Records and 7 Distinctions, Educate A Change.

38. Answer: C
    Image size = 16 cm = 160 mm = 160 000 µm.
    Magnification = 160 000 µm ÷ 80 µm = ×2000.
    A and B are too small; D is too large.

39. Answer: D
    A is wrong because both plant and bacterial cells have cytoplasm.
    B is wrong because both have ribosomes.
    C is wrong because both have a cell membrane.
    D is correct because plant cells have a true nucleus, while bacterial cells do not.

40. Answer: C
    A is wrong because animal cells also have nuclei.
    B is wrong because animal cells also have cell membranes.
    C is correct because fungal cells have cell walls, while typical animal cells do not.
    D is wrong because animal cells also have cytoplasm.

41. Answer: C
    A is wrong because haemoglobin is found in red blood cells.
    B is wrong because xylem vessels do not contain chloroplasts.
    C is correct because xylem vessels form hollow tubes for water transport.
    D is wrong because tails are associated with sperm cells, not xylem.

42. Answer: C
    A is wrong because it reverses the meanings.
    B is wrong because resolution and magnification are not the same.
    C is correct because magnification means enlargement, while resolution means distinguishing two close points.
    D is wrong because resolution applies to microscopes and images, not only drawings.

43. Answer: A
    A is correct because ribosomes are found in plant and animal cells and make proteins.
    B is wrong because animal cells do not have chloroplasts.
    C is wrong because animal cells do not have cell walls.
    D is wrong because animal cells do not have a permanent sap vacuole.

44. Answer: B
    Actual size = image size ÷ magnification = 36 mm ÷ 600 = 0.06 mm.
    A is too small; C and D are too large.

45. Answer: A
    A is correct because ciliated epithelial cells have cilia that move substances such as mucus over the surface.
    B is wrong because root hair cells absorb water and mineral ions.
    C is wrong because palisade cells carry out photosynthesis.
    D is wrong because red blood cells transport oxygen.

46. Answer: A
    A is correct because X is plant, Y is bacterium, and Z is animal.
    B is wrong because bacteria do not have chloroplasts and nuclei.
    C is wrong because animal cells do not have cell walls/chloroplasts, and bacteria do not have nuclei/mitochondria.
    D is wrong because animal cells do not have cell walls and chloroplasts.

47. Answer: B
    A is wrong because mature red blood cells do not have a nucleus.
    B is correct because loss of the nucleus leaves more space for haemoglobin.
    C is wrong because red blood cells do not have chloroplasts.
    D is wrong because red blood cells do not have cell walls.

48. Answer: C
    Total magnification = eyepiece × objective.
    Objective = 1000 ÷ 25 = ×40.
    A and B are too small; D is wrong because magnifications are multiplied, not subtracted.

49. Answer: A
    A is correct because a mature red blood cell definitely lacks a nucleus.
    B is wrong because animal cells have cell membranes.
    C is wrong because bacterial cells have ribosomes.
    D is wrong because liver cells have mitochondria.

50. Answer: B
    A is wrong because bacteria have cytoplasm, ribosomes and a cell membrane.
    B is correct because viruses have genetic material but no cytoplasm, ribosomes or true cell membrane.
    C is wrong because fungi are cells with cytoplasm, ribosomes and membranes.
    D is wrong because animal cells have cytoplasm, ribosomes and membranes.

Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 11 World Records and 7 Distinctions, Educate A Change.