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 base is found in RNA instead of thymine?

  1. AUracil
  2. BCytosine
  3. CAdenine
  4. DGuanine
2.Easy

What is the function of ribosomes?

  1. ACell division
  2. BProtein synthesis
  3. CPhotosynthesis
  4. DLipid storage
3.Easy

Osmosis is the movement of:

  1. AIons using ATP
  2. BWater across a semi-permeable membrane from lower to higher solute concentration
  3. CProteins into the nucleus
  4. DAny molecule across a membrane from high to low concentration, without using energy
4.Medium

Which cell junction lets ions and small molecules pass directly between neighbouring cells?

  1. AAdherens junction
  2. BGap junction
  3. CDesmosome
  4. DTight junction
5.Medium

A codon consists of:

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

What is the net ATP yield of glycolysis per molecule of glucose?

  1. A1 ATP
  2. B2 ATP
  3. C36 ATP
  4. D4 ATP
7.Hard

A mutant Ras protein cannot hydrolyse GTP. What is the effect on cell signalling?

  1. ARas stays inactive and growth signals stop
  2. BRas stays active and sends constant growth signals
  3. CRas moves into the nucleus and blocks transcription
  4. DRas is broken down faster
8.Hard

Why can translation in bacteria begin before transcription of the mRNA is finished?

  1. ABacterial ribosomes can read the DNA template directly in the cytoplasm
  2. BBacterial mRNA is spliced faster
  3. CBacteria do not use mRNA
  4. DThere is no nuclear envelope separating DNA from ribosomes

Answer key

  1. 1. A · Uracil
  2. 2. B · Protein synthesis
  3. 3. B · Water across a semi-permeable membrane from lower to higher solute concentration
  4. 4. B · Gap junction
  5. 5. A · Three nucleotides on mRNA that code for an amino acid or a stop signal
  6. 6. B · 2 ATP
  7. 7. B · Ras stays active and sends constant growth signals
  8. 8. D · There is no nuclear envelope separating DNA from ribosomes

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