In order to infect a cell, a virus must

A) inject its protein into the cell while the nucleic acid remains attached to the host cell surface.
B) have a special protein spike on its surface capsid that can interact with a receptor protein on the surface of the host cell.
C) actively burrow through the cell wall or cell membrane of the host cell to reach the cell's nucleus.
D) produce a special extension of its cytoplasm when it comes into contact with the appropriate host cell.
E) have enzymes to break down the cell wall or cell membrane of the host cell.

A ________ is a simple sugar with one saccharide.

A) disaccharide
B) monosaccharide
C) polysaccharides
D) none of the above

Much precipitation in the tropical rain forest is derived from:

A) evaporation from lakes.
B) evaporation from rivers.
C) groundwater.
D) transpiration.
E) translocation.

Replication typically occurs at a single origin of replication in eukaryotic chromosomes.

Positive feedback mechanisms are more commonly seen in ________ individuals.

A) healthy
B) unhealthy

The lower limit of resolution of a light microscope is ________.

A) 100μm
B) 0.1μm
C) 10μm
D) 0.01μm
E) 1.0μm

Which of the following is not a function of the kidney?

A) Regulation of blood pressure
B) Regulation of blood pH
C) Regulation of water and electrolyte concentrations in the blood
D) Secretion of renin and erythropoietin
E) All of these are functions of the kidney.

Companies have tried to challenge corporate campaigns by charging unions with blackmail, extortion, and other illegal interference in business relations, primarily under the same law used to prosecute the mafia, the _______________________________ Act.