CAX KS4 BIOL, Key Words,
Chromosomes, Genes and DNA
DNA - correct answer ✔✔a chemical containing the genetic code
chromosome - correct answer ✔✔a structure made of DNA which has small sections called genes
nucleotide - correct answer ✔✔part of the DNA molecule containing a nitrogenous base, sugar molecule
and a phosphate group
complementary base pairing - correct answer ✔✔complementary bases in DNA always bind with each
other and never with any other base
adenine - correct answer ✔✔pairs with thymine
cytosine - correct answer ✔✔pairs with guanine
polynucleotide - correct answer ✔✔DNA is made from two strands of nucleotides
sense strand - correct answer ✔✔strand of a DNA molecule which codes for manufacture of proteins in a
cell
anti-sense strand - correct answer ✔✔strand of DNA which does NOT code for manufacture of proteins
in a cell
intracellular enzymes - correct answer ✔✔enzymes which control processes inside the cell
extracellular enzymes - correct answer ✔✔enzymes that are secreted from the cell to have their effect
outside the cell
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