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 helps organise microtubules in animal cells and contains a pair of centrioles?

  1. ARibosome
  2. BCentrosome
  3. CVacuole
  4. DNucleolus
2.Easy

The cell membrane is mainly made of:

  1. ADNA
  2. BStarch
  3. CCellulose
  4. DA phospholipid bilayer with proteins
3.Easy

Which structure allows a sperm cell to swim?

  1. AFlagellum
  2. BCilium
  3. CCell wall
  4. DMicrovillus
4.Medium

A competitive inhibitor binds the active site of an enzyme. What can overcome its effect?

  1. ALowering the temperature to 0 °C
  2. BRaising the substrate concentration
  3. CRaising the inhibitor concentration
  4. DRemoving the enzyme's cofactor
5.Medium

Which enzyme makes the second messenger cyclic AMP when activated by a Gs protein?

  1. AAdenylyl cyclase
  2. BPhospholipase C
  3. CProtein kinase A
  4. DPhosphodiesterase
6.Medium

The rough endoplasmic reticulum is "rough" because it:

  1. AIs studded with ribosomes
  2. BHas a cell wall
  3. CContains DNA
  4. DStores calcium only
7.Hard

In the intrinsic (mitochondrial) pathway of apoptosis, which event leads to caspase activation?

  1. AFusion of lysosomes with the nucleus
  2. BBinding of a death ligand to the Fas receptor on the cell surface
  3. CEntry of glucose into the mitochondria
  4. DRelease of cytochrome c from mitochondria into the cytosol
8.Hard

A double-stranded DNA sample contains 30% adenine. What percentage is guanine?

  1. A70%
  2. B40%
  3. C30%
  4. D20%

Answer key

  1. 1. B · Centrosome
  2. 2. D · A phospholipid bilayer with proteins
  3. 3. A · Flagellum
  4. 4. B · Raising the substrate concentration
  5. 5. A · Adenylyl cyclase
  6. 6. A · Is studded with ribosomes
  7. 7. D · Release of cytochrome c from mitochondria into the cytosol
  8. 8. D · 20%

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