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 organelle breaks down hydrogen peroxide using the enzyme catalase?

  1. AGolgi apparatus
  2. BLysosome
  3. CRibosome
  4. DPeroxisome
2.Easy

Which statement is part of the cell theory?

  1. AAll cells can perform photosynthesis
  2. BAll cells are the same size
  3. CAll cells come from pre-existing cells
  4. DAll cells contain a nucleus
3.Easy

What is a mutation?

  1. AA change in the DNA base sequence
  2. BThe splitting of a chromosome during mitosis
  3. CA change in the shape of the cell
  4. DThe normal copying of DNA
4.Medium

What is crossing over during meiosis?

  1. AExchange of genetic material between homologous chromosomes in prophase I
  2. BFusion of two gametes
  3. CCopying of DNA before division
  4. DSeparation of sister chromatids as they move to opposite poles in anaphase II
5.Medium

A codon consists of:

  1. AA whole gene
  2. BThree nucleotides on mRNA that code for an amino acid or a stop signal
  3. COne nucleotide
  4. DThree amino acids
6.Medium

Where in the cell does the citric acid (Krebs) cycle take place?

  1. AInner mitochondrial membrane
  2. BMitochondrial matrix
  3. CIntermembrane space
  4. DCytoplasm
7.Hard

In damaged tissue, cells swell, their membranes burst and the area becomes inflamed. Which type of cell death is this?

  1. ANecrosis
  2. BSenescence
  3. CApoptosis
  4. DMitosis
8.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 joining of Okazaki fragments
  4. DThe shortening of chromosome ends with each round of replication

Answer key

  1. 1. D · Peroxisome
  2. 2. C · All cells come from pre-existing cells
  3. 3. A · A change in the DNA base sequence
  4. 4. A · Exchange of genetic material between homologous chromosomes in prophase I
  5. 5. B · Three nucleotides on mRNA that code for an amino acid or a stop signal
  6. 6. B · Mitochondrial matrix
  7. 7. A · Necrosis
  8. 8. D · The shortening of chromosome ends with each round of replication

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