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 is the main role of the nucleolus?

  1. ACopying the whole genome
  2. BStoring ATP for the nucleus
  3. CBreaking down damaged proteins that are tagged with ubiquitin
  4. DMaking ribosomal RNA and assembling ribosome subunits
2.Easy

What is the function of ribosomes?

  1. ACell division
  2. BPhotosynthesis
  3. CProtein synthesis
  4. DLipid storage
3.Easy

What are the building blocks (monomers) of DNA called?

  1. AFatty acids
  2. BMonosaccharides
  3. CAmino acids
  4. DNucleotides
4.Medium

The Golgi apparatus mainly:

  1. ABreaks down old organelles and engulfed bacteria with enzymes
  2. BReplicates DNA
  3. CModifies, sorts and packages proteins for transport
  4. DProduces ATP
5.Medium

What directly drives ATP synthase to make ATP in mitochondria?

  1. AProtons flowing back into the matrix down their gradient
  2. BElectrons from NADH flowing directly through ATP synthase
  3. CGlucose binding to ATP synthase
  4. DOxygen diffusing into the matrix
6.Medium

What is the G0 phase of the cell cycle?

  1. AThe phase in which DNA is copied
  2. BA resting state in which cells have left the cycle and stopped dividing
  3. CThe final stage of mitosis
  4. DA phase found only in cancer cells that have stopped responding to signals
7.Hard

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

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

Which statement about the sodium–potassium pump is correct?

  1. AIt moves 3 Na⁺ out and 2 K⁺ in for each ATP used
  2. BIt needs no energy
  3. CIt moves Na⁺ and K⁺ in the same direction across the membrane
  4. DIt moves 2 Na⁺ out and 3 K⁺ in

Answer key

  1. 1. D · Making ribosomal RNA and assembling ribosome subunits
  2. 2. C · Protein synthesis
  3. 3. D · Nucleotides
  4. 4. C · Modifies, sorts and packages proteins for transport
  5. 5. A · Protons flowing back into the matrix down their gradient
  6. 6. B · A resting state in which cells have left the cycle and stopped dividing
  7. 7. A · The spindle assembly (metaphase) checkpoint
  8. 8. A · It moves 3 Na⁺ out and 2 K⁺ in for each ATP used

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