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.

New worksheetPractise online with hints

For teachers: free to print, copy and use in class. Every new worksheet has new values and its own answer key. A link to ExamProblems on your course page is appreciated.

Name: ____________________   Date: ____________

1.Easy

What is the main function of lysosomes?

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

What is a mutation?

  1. AThe splitting of a chromosome during mitosis
  2. BThe normal copying of DNA
  3. CA change in the DNA base sequence
  4. DA change in the shape of the cell
3.Easy

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

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

What is the net ATP yield of glycolysis per molecule of glucose?

  1. A2 ATP
  2. B36 ATP
  3. C1 ATP
  4. D4 ATP
5.Medium

Which cell junction seals neighbouring epithelial cells together and stops fluid leaking between them?

  1. ADesmosome
  2. BGap junction
  3. CHemidesmosome
  4. DTight junction
6.Medium

Which enzyme unwinds the DNA double helix during replication?

  1. ADNA ligase
  2. BHelicase
  3. CDNA polymerase
  4. DPrimase
7.Hard

Which checkpoint ensures all chromosomes are attached to the spindle before anaphase begins?

  1. AThe G1/S checkpoint
  2. BThe S-phase checkpoint
  3. CThe spindle assembly (metaphase) checkpoint
  4. DThe G2/M checkpoint
8.Hard

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

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

Answer key

  1. 1. B · Breaking down worn-out parts and engulfed material with enzymes
  2. 2. C · A change in the DNA base sequence
  3. 3. D · It swells and may burst
  4. 4. A · 2 ATP
  5. 5. D · Tight junction
  6. 6. B · Helicase
  7. 7. C · The spindle assembly (metaphase) checkpoint
  8. 8. D · Energy from the proton gradient is released as heat instead of making ATP

Full step-by-step solutions: practise this topic on examproblems.com.