A Level Biology

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Across
  1. 2. initiates the cardiac cycle.
  2. 3. water potential of pure water.
  3. 4. a different version of a gene.
  4. 6. amino acid needed for disulphide bonds in proteins.
  5. 9. "cell drinking".
  6. 11. a functioning polypeptide molecule.
  7. 13. contraction of the heart and ejection of blood.
  8. 14. reagent used to test for the presence of protein.
  9. 16. a cofactor-activated enzyme.
  10. 17. bond between nucleotides in a strand of DNA.
  11. 18. provides shape and stability to a cell.
  12. 19. this type of reaction releases energy from ATP.
Down
  1. 1. main structural protein in skin and blood vessels.
  2. 2. main structural material in the casparian strip.
  3. 5. where ribosomes are synthesised.
  4. 7. building block of nucleic acids.
  5. 8. a measure of the spread of data.
  6. 10. an example of a fibrous protein.
  7. 12. an example of a monosaccharide.
  8. 15. needed for transcription.