Question 1

Which of the following best describes the mechanism by which nonsteroidal anti-inflammatory drugs (NSAIDs) relieve pain and reduce inflammation?

Accepted Answer

NSAIDs block the production of prostaglandins by inhibiting cyclooxygenase (COX) enzymes.

Question 2

Aspirin is often used in small daily doses to prevent heart attacks and strokes. Which property of aspirin makes it effective for this purpose?

Accepted Answer

Aspirin is an anticoagulant, blocking prostaglandins responsible for blood clotting.

Question 3

Which enzyme is blocked by acetaminophen, and what is a major risk associated with its overdose?

Accepted Answer

Acetaminophen blocks the COX-3 enzyme; overdose can cause liver and kidney damage.

Question 4

Sulfanilamide was the first antibacterial drug. How does it act against bacteria?

Accepted Answer

Sulfanilamide replaces para-aminobenzoic acid, preventing bacteria from manufacturing folic acid.

Question 5

Penicillins are effective antibiotics because they:

Accepted Answer

Inhibit the enzymes bacteria use to make their cell walls.

Question 6

Which of the following drugs is used to treat angina pectoris by releasing nitric oxide (NO) to relax constricted blood vessels?

Accepted Answer

Nitroglycerin

Question 7

Which neurotransmitter is implicated in the fight-or-flight response and can increase blood pressure?

Accepted Answer

Epinephrine

Question 8

Which of the following statements about codeine and heroin is correct?

Accepted Answer

Heroin is made by converting both hydroxyl groups of morphine to acetate esters, making it less polar and more soluble in fatty brain tissue.

Question 9

Which class of drugs is commonly used to treat depression by enhancing the effect of serotonin through blocking its reabsorption?

Accepted Answer

Selective serotonin reuptake inhibitors (SSRIs)

Question 10

Fluoroquinolones, such as ciprofloxacin, are broad-spectrum antibiotics. What is their primary mechanism of action?

Accepted Answer

Interfering with the enzyme DNA gyrase to inhibit DNA replication.

Question 11

Which of the following is a major active ingredient in marijuana, responsible for its psychoactive effects?

Accepted Answer

Tetrahydrocannabinol (THC)

Question 12

Which of the following statements about local anesthetics is correct?

Accepted Answer

Local anesthetics block nerve conduction by reducing the permeability of the nerve cell membrane to sodium ions.

Question 13

Which of the following drugs is used to treat heroin addiction and is less addictive than morphine?

Accepted Answer

Methadone

Question 14

Which of the following is a common misconception about antibiotics?

Accepted Answer

Antibiotics are only effective against bacterial infections.

Question 15

Which of the following drugs acts by preventing the reabsorption of dopamine, leading to stimulation of the brain's pleasure centers?

Accepted Answer

Cocaine

Question 16

Which of the following statements about endorphins is correct?

Accepted Answer

Endorphins are morphine-like peptide chains produced in response to pain and bind to the same receptors as morphine.

Question 17

Which of the following drugs is a psychedelic alkaloid found in mushrooms and has effects similar to LSD?

Accepted Answer

Psilocybin

Question 18

Which of the following drugs is used to treat heart failure and is a mixture of glycosides that release carbohydrates and steroids on hydrolysis?

Accepted Answer

Digitalis

Question 19

Which of the following statements about tetracyclines is correct?

Accepted Answer

Tetracyclines are broad-spectrum antibiotics that act by binding to bacterial ribosomes and inhibiting protein synthesis.

Question 20

Which of the following statements about psychotropic drugs is correct?

Accepted Answer

Depressants such as alcohol, anesthetics, opiates, barbiturates, and tranquilizers reduce consciousness and reaction to stimuli.

Chemistry of Drugs: Structure, Function, and Societal Impact

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