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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Name: ____________________   Date: ____________

1.Easy

Which base is found in RNA instead of thymine?

  1. ACytosine
  2. BGuanine
  3. CAdenine
  4. DUracil
2.Easy

What is exocytosis?

  1. AMovement of ions through protein pumps
  2. BRelease of substances from the cell by vesicles fusing with the membrane
  3. CUptake of fluid and dissolved solutes into small vesicles formed by the membrane
  4. DBreakdown of the cell membrane
3.Easy

A haploid cell contains:

  1. AFour sets of chromosomes
  2. BOne set of chromosomes
  3. CTwo sets of chromosomes
  4. DNo chromosomes
4.Medium

Cyclin-dependent kinases (CDKs) that drive the cell cycle become active when they bind to:

  1. ACyclins
  2. BRibosomes
  3. CHistones
  4. DTubulins
5.Medium

What is crossing over during meiosis?

  1. ASeparation of sister chromatids as they move to opposite poles in anaphase II
  2. BExchange of genetic material between homologous chromosomes in prophase I
  3. CCopying of DNA before division
  4. DFusion of two gametes
6.Medium

What role does cholesterol play in animal cell membranes?

  1. AIt forms channels for ions
  2. BIt is the main carrier of glucose
  3. CIt helps keep membrane fluidity stable across temperatures
  4. DIt makes the membrane completely rigid at every temperature
7.Hard

Mitochondria have their own DNA, but where are most mitochondrial proteins made?

  1. AOn cytosolic ribosomes from nuclear genes, then imported
  2. BIn the Golgi apparatus
  3. CInside the mitochondrion from mitochondrial genes
  4. DIn the rough ER and delivered by vesicles
8.Hard

What problem does telomerase solve?

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

Answer key

  1. 1. D · Uracil
  2. 2. B · Release of substances from the cell by vesicles fusing with the membrane
  3. 3. B · One set of chromosomes
  4. 4. A · Cyclins
  5. 5. B · Exchange of genetic material between homologous chromosomes in prophase I
  6. 6. C · It helps keep membrane fluidity stable across temperatures
  7. 7. A · On cytosolic ribosomes from nuclear genes, then imported
  8. 8. A · The shortening of chromosome ends with each round of replication

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