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 diffusion?

  1. AMovement of particles against their concentration gradient using ATP
  2. BMovement of water only across a membrane
  3. CEngulfing of particles by the cell membrane
  4. DNet movement of particles from high to low concentration
2.Easy

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

  1. ARibosomes
  2. BCell wall
  3. CMitochondria
  4. DCell membrane
3.Easy

How many chromosomes are in a normal human body (somatic) cell?

  1. A46
  2. B48
  3. C23
  4. D44
4.Medium

What is the G0 phase of the cell cycle?

  1. AA resting state in which cells have left the cycle and stopped dividing
  2. BThe phase in which DNA is copied
  3. CA phase found only in cancer cells that have stopped responding to signals
  4. DThe final stage of mitosis
5.Medium

The contractile ring that pinches an animal cell in two during cytokinesis is made of:

  1. ACellulose fibres
  2. BMicrotubules and kinesin
  3. CKeratin filaments
  4. DActin and myosin
6.Medium

How do large proteins such as transcription factors enter the nucleus?

  1. AThrough nuclear pore complexes, guided by a nuclear localisation signal
  2. BBy diffusing freely through the nuclear membrane lipids
  3. CThey are made inside the nucleus by nuclear ribosomes, so they never enter
  4. DBy exocytosis from the endoplasmic reticulum
7.Hard

What problem does telomerase solve?

  1. AThe removal of introns from mRNA
  2. BThe unwinding of the double helix at each replication fork by helicase
  3. CThe shortening of chromosome ends with each round of replication
  4. DThe joining of Okazaki fragments
8.Hard

In E. coli, under which conditions is the lac operon most strongly transcribed?

  1. ABoth lactose and glucose present
  2. BLactose present and glucose absent
  3. CLactose absent and glucose present
  4. DBoth lactose and glucose absent

Answer key

  1. 1. D · Net movement of particles from high to low concentration
  2. 2. B · Cell wall
  3. 3. A · 46
  4. 4. A · A resting state in which cells have left the cycle and stopped dividing
  5. 5. D · Actin and myosin
  6. 6. A · Through nuclear pore complexes, guided by a nuclear localisation signal
  7. 7. C · The shortening of chromosome ends with each round of replication
  8. 8. B · Lactose present and glucose absent

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