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 main role of the nucleolus?

  1. AStoring ATP for the nucleus
  2. BCopying the whole genome
  3. CBreaking down damaged proteins that are tagged with ubiquitin
  4. DMaking ribosomal RNA and assembling ribosome subunits
2.Easy

How do enzymes speed up chemical reactions?

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

The cell membrane is mainly made of:

  1. ADNA
  2. BCellulose
  3. CA phospholipid bilayer with proteins
  4. DStarch
4.Medium

How does glucose enter most body cells, such as red blood cells?

  1. ABy primary active transport using ATP directly at the membrane
  2. BBy facilitated diffusion through GLUT carrier proteins
  3. CBy phagocytosis
  4. DBy simple diffusion through the lipid bilayer
5.Medium

What does it mean that the genetic code is "degenerate" (redundant)?

  1. AMost amino acids are coded by more than one codon
  2. BThe code differs completely between species
  3. CEach codon codes for several amino acids
  4. DSome codons are never used
6.Medium

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

  1. AAUG, coding for methionine
  2. BUAA, coding for leucine
  3. CUGA, coding for methionine
  4. DAUG, coding for glycine
7.Hard

In Tay–Sachs disease, a ganglioside builds up in nerve cells because of a missing enzyme. In which organelle does the build-up occur?

  1. AMitochondrion
  2. BPeroxisome
  3. CLysosome
  4. DSmooth ER
8.Hard

In Griffith's 1928 experiment, mice injected with heat-killed smooth (S) pneumococci plus live rough (R) bacteria died. What did this show?

  1. AMice make S bacteria from R bacteria
  2. BHeat does not kill S bacteria
  3. CA substance from the dead S cells transformed R cells into a virulent form
  4. DR bacteria are virulent on their own

Answer key

  1. 1. D · Making ribosomal RNA and assembling ribosome subunits
  2. 2. B · They lower the activation energy
  3. 3. C · A phospholipid bilayer with proteins
  4. 4. B · By facilitated diffusion through GLUT carrier proteins
  5. 5. A · Most amino acids are coded by more than one codon
  6. 6. A · AUG, coding for methionine
  7. 7. C · Lysosome
  8. 8. C · A substance from the dead S cells transformed R cells into a virulent form

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