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 a gene?

  1. AA single nucleotide
  2. BA protein that copies DNA
  3. CA DNA sequence that codes for a protein or functional RNA
  4. DA whole chromosome
2.Easy

How do enzymes speed up chemical reactions?

  1. AThey are used up in the reaction
  2. BThey lower the activation energy
  3. CThey change the reaction's final equilibrium
  4. DThey raise the temperature of the cell
3.Easy

What is diffusion?

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

What separates during anaphase I of meiosis?

  1. AHomologous chromosomes
  2. BSister chromatids
  3. CWhole nuclei
  4. DCentromeres of each chromatid
5.Medium

Which cytoskeletal filaments mainly give cells resistance to mechanical stress, such as keratin in skin?

  1. AIntermediate filaments
  2. BActin microfilaments
  3. CMicrotubules
  4. DSpindle fibres
6.Medium

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

  1. ACytoplasm
  2. BMitochondrial matrix
  3. CIntermembrane space
  4. DInner mitochondrial membrane
7.Hard

In the Hershey–Chase experiment, phages labelled with ³²P and ³⁵S infected bacteria. What was found inside the bacteria?

  1. AMostly ³⁵S, showing protein enters the cell
  2. BEqual amounts of both labels
  3. CMostly ³²P, showing DNA enters the cell
  4. DNeither label, because phages stay outside
8.Hard

What problem does telomerase solve?

  1. AThe joining of Okazaki fragments
  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 removal of introns from mRNA

Answer key

  1. 1. C · A DNA sequence that codes for a protein or functional RNA
  2. 2. B · They lower the activation energy
  3. 3. D · Net movement of particles from high to low concentration
  4. 4. A · Homologous chromosomes
  5. 5. A · Intermediate filaments
  6. 6. B · Mitochondrial matrix
  7. 7. C · Mostly ³²P, showing DNA enters the cell
  8. 8. C · The shortening of chromosome ends with each round of replication

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