Question 1

What is the relationship between any two strands of DNA?

Accepted Answer

A)  An A base on one always pairs with a G base on the other. 
B)  They are a pair of sister chromatids. 
C)  They are connected to each other by sugar-phosphate bonds. 
D)  One was the template for the synthesis of the other. 
E)  They have identical base sequences.

Question 2

If mutations lead to cancerous cells, why don't most point mutations immediately make a cell cancerous?

Accepted Answer

A)  Cancer-causing changes are accompanied by compensating cancer-reducing changes. 
B)  Point mutations are not passed from parent to daughter cells in cell division. 
C)  All point mutations occur in germ-line cells, which do not become cancerous. 
D)  Multiple mutations are required to make a malignant cancer cell. 
E)  Point mutations rarely occur in genes.

Exam 13: Dna Structure and Replication

What is the relationship between any two strands of DNA?

If mutations lead to cancerous cells, why don't most point mutations immediately make a cell cancerous?