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 are the building blocks (monomers) of DNA called?

  1. AFatty acids
  2. BAmino acids
  3. CMonosaccharides
  4. DNucleotides
2.Easy

Osmosis is the movement of:

  1. AAny molecule across a membrane from high to low concentration, without using energy
  2. BProteins into the nucleus
  3. CWater across a semi-permeable membrane from lower to higher solute concentration
  4. DIons using ATP
3.Easy

Which organelle produces most of the cell's ATP?

  1. ARibosome
  2. BGolgi apparatus
  3. CMitochondrion
  4. DLysosome
4.Medium

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

  1. AEach codon codes for several amino acids
  2. BSome codons are never used
  3. CMost amino acids are coded by more than one codon
  4. DThe code differs completely between species
5.Medium

Transcription produces:

  1. AmRNA from a DNA template
  2. BProtein from mRNA
  3. CDNA from RNA
  4. DDNA from DNA
6.Medium

Where does RNA polymerase bind to start transcription of a gene?

  1. AAt the start codon
  2. BAt the stop codon
  3. CAt the terminator
  4. DAt the promoter
7.Hard

Non-disjunction during meiosis can result in:

  1. ACrossing over
  2. BIdentical twins
  3. CMitochondrial DNA mutations only, which are passed on through the egg cytoplasm
  4. DGametes with an abnormal number of chromosomes, such as in Down syndrome
8.Hard

What problem does telomerase solve?

  1. AThe removal of introns from mRNA
  2. BThe joining of Okazaki fragments
  3. CThe shortening of chromosome ends with each round of replication
  4. DThe unwinding of the double helix at each replication fork by helicase

Answer key

  1. 1. D · Nucleotides
  2. 2. C · Water across a semi-permeable membrane from lower to higher solute concentration
  3. 3. C · Mitochondrion
  4. 4. C · Most amino acids are coded by more than one codon
  5. 5. A · mRNA from a DNA template
  6. 6. D · At the promoter
  7. 7. D · Gametes with an abnormal number of chromosomes, such as in Down syndrome
  8. 8. C · The shortening of chromosome ends with each round of replication

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