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

What happens to a red blood cell placed in pure water?

  1. AIt swells and may burst
  2. BIt stays the same size
  3. CIt divides into two cells
  4. DIt shrinks and shrivels
2.Easy

What is the main function of lysosomes?

  1. AMaking proteins for export and packaging them into secretory vesicles
  2. BProducing ATP by respiration
  3. CBreaking down worn-out parts and engulfed material with enzymes
  4. DStoring the cell's DNA
3.Easy

What is cytokinesis?

  1. AThe division of the cytoplasm into two daughter cells
  2. BThe breakdown of the nuclear envelope
  3. CThe pairing of homologous chromosomes
  4. DThe copying of DNA before division
4.Medium

What separates during anaphase I of meiosis?

  1. ASister chromatids
  2. BWhole nuclei
  3. CHomologous chromosomes
  4. DCentromeres of each chromatid
5.Medium

A point mutation changes a codon for an amino acid into a stop codon. What type of mutation is this?

  1. AFrameshift mutation
  2. BSilent mutation
  3. CMissense mutation
  4. DNonsense mutation
6.Medium

Where does RNA polymerase bind to start transcription of a gene?

  1. AAt the stop codon
  2. BAt the promoter
  3. CAt the start codon
  4. DAt the terminator
7.Hard

Tumour suppressor genes such as p53 normally:

  1. AProduce growth factors
  2. BStop the cell cycle or trigger apoptosis when DNA is damaged
  3. CSpeed up cell division so that damaged cells are quickly replaced
  4. DMake cells immortal
8.Hard

Brown fat contains thermogenin (UCP1), which lets protons leak back across the inner mitochondrial membrane. What is the effect?

  1. AThe electron transport chain stops working because protons can no longer be pumped
  2. BThe cell switches to fermentation
  3. CMore ATP is made per glucose
  4. DEnergy from the proton gradient is released as heat instead of making ATP

Answer key

  1. 1. A · It swells and may burst
  2. 2. C · Breaking down worn-out parts and engulfed material with enzymes
  3. 3. A · The division of the cytoplasm into two daughter cells
  4. 4. C · Homologous chromosomes
  5. 5. D · Nonsense mutation
  6. 6. B · At the promoter
  7. 7. B · Stop the cell cycle or trigger apoptosis when DNA is damaged
  8. 8. D · Energy from the proton gradient is released as heat instead of making ATP

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