Cell biology worksheet with answers

Free printable Cell biology worksheet: 8 problems from easy to exam level, with an answer key. Print it or save it as a PDF.

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1.Easy

Which structure allows a sperm cell to swim?

  1. AFlagellum
  2. BMicrovillus
  3. CCell wall
  4. DCilium
2.Easy

Which structure is found in plant cells but not in animal cells?

  1. ACell wall
  2. BCell membrane
  3. CRibosomes
  4. DMitochondria
3.Easy

What is diffusion?

  1. AMovement of particles against their concentration gradient using ATP
  2. BEngulfing of particles by the cell membrane
  3. CNet movement of particles from high to low concentration
  4. DMovement of water only across a membrane
4.Medium

Which molecules can cross a phospholipid bilayer most easily by simple diffusion?

  1. AIons such as Na⁺ and K⁺
  2. BProteins such as albumin
  3. CLarge polar molecules such as glucose
  4. DSmall non-polar molecules such as O₂ and CO₂
5.Medium

Where in the cell does the citric acid (Krebs) cycle take place?

  1. AMitochondrial matrix
  2. BInner mitochondrial membrane
  3. CCytoplasm
  4. DIntermembrane space
6.Medium

Why does inserting a single nucleotide into a coding sequence usually have a large effect?

  1. AIt always changes one amino acid only
  2. BIt changes the sugar in the DNA backbone
  3. CIt shifts the reading frame of all following codons
  4. DIt stops the gene from being transcribed into messenger RNA
7.Hard

Tumour suppressor genes such as p53 normally:

  1. AMake cells immortal
  2. BSpeed up cell division so that damaged cells are quickly replaced
  3. CStop the cell cycle or trigger apoptosis when DNA is damaged
  4. DProduce growth factors
8.Hard

In Griffith's 1928 experiment, mice injected with heat-killed smooth (S) pneumococci plus live rough (R) bacteria died. What did this show?

  1. AA substance from the dead S cells transformed R cells into a virulent form
  2. BMice make S bacteria from R bacteria
  3. CR bacteria are virulent on their own
  4. DHeat does not kill S bacteria

Answer key

  1. 1. A · Flagellum
  2. 2. A · Cell wall
  3. 3. C · Net movement of particles from high to low concentration
  4. 4. D · Small non-polar molecules such as O₂ and CO₂
  5. 5. A · Mitochondrial matrix
  6. 6. C · It shifts the reading frame of all following codons
  7. 7. C · Stop the cell cycle or trigger apoptosis when DNA is damaged
  8. 8. A · A substance from the dead S cells transformed R cells into a virulent form

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