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

Which part of the cytoskeleton forms the mitotic spindle?

  1. AActin filaments
  2. BMicrotubules
  3. CIntermediate filaments
  4. DCollagen fibres
2.Easy

What is a mutation?

  1. AA change in the DNA base sequence
  2. BThe splitting of a chromosome during mitosis
  3. CThe normal copying of DNA
  4. DA change in the shape of the cell
3.Easy

Which base is found in RNA instead of thymine?

  1. AGuanine
  2. BCytosine
  3. CUracil
  4. DAdenine
4.Medium

What separates during anaphase I of meiosis?

  1. ASister chromatids
  2. BCentromeres of each chromatid
  3. CHomologous chromosomes
  4. DWhole nuclei
5.Medium

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

  1. AThey are made inside the nucleus by nuclear ribosomes, so they never enter
  2. BThrough nuclear pore complexes, guided by a nuclear localisation signal
  3. CBy exocytosis from the endoplasmic reticulum
  4. DBy diffusing freely through the nuclear membrane lipids
6.Medium

Transcription produces:

  1. ADNA from DNA
  2. BmRNA from a DNA template
  3. CDNA from RNA
  4. DProtein from mRNA
7.Hard

The endosymbiotic theory is supported by the fact that mitochondria:

  1. AContain chlorophyll
  2. BHave no membranes
  3. CHave their own circular DNA and 70S-like ribosomes
  4. DAre made in the nucleus
8.Hard

How can one human gene produce several different proteins?

  1. ABy using a different genetic code in each tissue
  2. BBy alternative splicing of its pre-mRNA
  3. CBy copying the gene into different chromosomes
  4. DBy reading the gene in all three frames at once

Answer key

  1. 1. B · Microtubules
  2. 2. A · A change in the DNA base sequence
  3. 3. C · Uracil
  4. 4. C · Homologous chromosomes
  5. 5. B · Through nuclear pore complexes, guided by a nuclear localisation signal
  6. 6. B · mRNA from a DNA template
  7. 7. C · Have their own circular DNA and 70S-like ribosomes
  8. 8. B · By alternative splicing of its pre-mRNA

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