PCAT Biological Practice Test

Question 1

During sympathetic stimulation, which of the following would NOT happen?

Accepted Answer

dilation of intestinal blood vessels

Answer

dilation of bronchioles

Answer

secretion of glucagon

Answer

dilation of pupils

Question 2

A disaccharide's breakdown releases energy, which is stored as ATP. This is an illustration of a (n)

Accepted Answer

Exothermic reaction

Answer

Endothermic reaction

Answer

Combination reaction

Answer

Replacement reaction

Question 3

Which of the following would raise the blood's pH?

Accepted Answer

the digestion of a big meal

Answer

an increase in anaerobic respiration

Answer

an increase of the blood pCO2

Answer

severe damage to the kidneys

Question 4

Cyanide is a toxin that binds to the active site of the cytochrome c enzyme and stops it from working. Cyanide is a  (n)

Accepted Answer

Inhibitor

Answer

Cofactor

Answer

Prosthetic group

Answer

Coenzyme

Question 5

Which of the following produces the least ATP?

Accepted Answer

TCA cycle

Answer

glycolysis

Answer

Beta Oxidation

Answer

oxidative phosphorylation

Question 6

A virulent phage infects by:

Accepted Answer

the lytic cycle

Answer

phagocytosis

Answer

the lysogenic cycle

Answer

immunoglobins

Question 7

Disaccharides are decomposed into monosaccharides via which of the following?

Accepted Answer

brush border enzymes

Answer

gastrin

Answer

salivary amalyse

Answer

pancreatic enzymes

Question 8

Hemoglobin has the strongest bonds with which of the following?

Accepted Answer

carbon monoxide

Answer

carbon dioxide

Answer

hydrogen

Answer

oxygen

Question 9

What causes a cell to have extra or fewer chromosomes?

Accepted Answer

nondisjunction

Answer

double cytokinesis

Answer

epistasis

Answer

double replication

Question 10

Hearing involves which of the following?

Accepted Answer

hair cells

Answer

microvilli

Answer

cilia

Answer

hair follicles