A) G₀ is an abnormal state, and cells in this stage have been damaged.
B) Neurons and osteocytes remain in G₀ after adolescence.
C) Most cancer cells have entered the G₀ phase.
D) Once in G₀, a cell remains there.
E) Stems cells in the bone marrow are typically in the G₀ phase.

A) Each strand of the original DNA is first completely separated from the other.
B) Replication of DNA occurs at multiple locations on the two original strands as the DNA is unzipped.
C) Replication of DNA can begin anywhere along the length of the strands.
D) The two original strands are first broken down to release nucleotides for the synthesis of new DNA.
E) One of the original strands of DNA serves as a template for new DNA; the other strand is broken down to release nucleotides for the synthesis of new DNA.

A) 1
B) 3
C) 4
D) 6
E) 12