1. Cancer consists of too much

cell division.

apoptosis.

DNA replication.

toxin production.

translation.

2. Apoptosis

is programmed cell death.

occurs in normal cell division.

is a mechanism of cell repair.

contains several checkpoints.

ensures equal DNA in cytokinesis.

3. Proto-oncogenes are

tumor regulators.

required for normal cell division.

mutations in oncogenes.

tumor suppressors.

cancer-causing in normal cells.

4. Taxol was an important new chemotherapy drug because it

waseffective and inexpensive.

was present in only very low amounts in tree bark.

killed ovarian and breast cancer cells.

targeted a different step of the cell cycle compared to otherdrugs.

could be extracted from widely available trees.

5. Substitution of a nucleotide base in the tenth codon of a 300codon coding sequence of a gene may alter the protein's

All of the above.

amino acid sequence.

function.

3D shape.

folding.