1. In a skin cell which of the following changes may lead to skincancer?
a) a change in a single nucleotide in a DNA molecule
b) a change in a single nucleotide in an mRNA molecule
c) a change in multiple amino acids of a single proteinmolecule
d) a change in the conformation of an enzyme molecule
e) a change in the number of enzyme molecules present in the cell
2. Which of the following serves as a template for making proteins from DNA?
a) tRNA
b) mRNA
c) rRNA
d) amino acids
e) DNA polymerase