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 the final electron acceptor in aerobic respiration?

  1. AOxygen
  2. BNAD⁺
  3. CCarbon dioxide
  4. DGlucose
2.Easy

The cell membrane is mainly made of:

  1. AStarch
  2. BCellulose
  3. CA phospholipid bilayer with proteins
  4. DDNA
3.Easy

Proteins are polymers of which monomers?

  1. AAmino acids
  2. BSimple sugars
  3. CGlycerol molecules
  4. DNucleotides
4.Medium

Which cell junction anchors intermediate filaments and gives tissues such as skin mechanical strength?

  1. AGap junction
  2. BTight junction
  3. CDesmosome
  4. DPlasmodesma
5.Medium

What separates during anaphase I of meiosis?

  1. AHomologous chromosomes
  2. BSister chromatids
  3. CCentromeres of each chromatid
  4. DWhole nuclei
6.Medium

Which codon starts translation and which amino acid does it code for?

  1. AAUG, coding for glycine
  2. BAUG, coding for methionine
  3. CUAA, coding for leucine
  4. DUGA, coding for methionine
7.Hard

How does a cell mark a damaged or short-lived protein for destruction by the proteasome?

  1. ABy adding mannose-6-phosphate
  2. BBy attaching a chain of ubiquitin molecules
  3. CBy removing all its phosphate groups
  4. DBy adding a signal sequence for the ER
8.Hard

A signal molecule that cannot cross the membrane, such as adrenaline, acts by:

  1. ABeing converted into ATP
  2. BBinding a surface receptor that triggers a second-messenger cascade
  3. CDissolving the membrane
  4. DDiffusing into the nucleus and binding DNA to change gene transcription

Answer key

  1. 1. A · Oxygen
  2. 2. C · A phospholipid bilayer with proteins
  3. 3. A · Amino acids
  4. 4. C · Desmosome
  5. 5. A · Homologous chromosomes
  6. 6. B · AUG, coding for methionine
  7. 7. B · By attaching a chain of ubiquitin molecules
  8. 8. B · Binding a surface receptor that triggers a second-messenger cascade

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