The enzyme reverse transcriptase possessed by HIV catalyzes the conversion of which of the following?

Which of the following statements about tumors is correct?

Mediators of inflammation are biologically active compounds derived from the cells or blood plasma.

What does the ending -itis indicate when it is affixed to the name of an organ or tissue (e.g., hepatitis)?

A mother has given birth to an infant with cytomegalic inclusion disease. What does this indicate?

Which of the following refers to the absence of a chromosome?

A middle-aged man has a communicable disease caused by a virus that is excreted in the feces. Which of the following measures could be least effective or ineffective in limiting the spread of the infection?

Which of the following is the sum total of all the genes contained in a cell’s chromosomes?

The normal osmolarity of blood and body fluids is 300 Osm/L. A person with severe diabetes and greatly elevated blood glucose has a blood osmolarity of 370 Osm/L. Which of the following events will result from the increased osmolarity?

The immune defenses of the host are activated as viruses that invade cells produce new antigens and the body recognizes the antigens as foreign.