Topic
UPCAT Biology questions with answers
14 UPCAT biology practice questions, each with the correct answer and a worked explanation. Drill this single topic instead of a whole subtest.
- 1Which organelle is the main site of aerobic respiration in a eukaryotic cell?
Answer: D. MitochondrionScience - 2Which molecule delivers amino acids to the ribosome during translation?
Answer: B. tRNAScience - 3The loss of water vapor from a plant through the stomata is called
Answer: D. transpirationScience - 4Which vessel carries oxygenated blood from the lungs back to the heart?
Answer: B. Pulmonary veinScience - 5In a cross between two heterozygous individuals (Aa × Aa), what is the expected genotypic ratio of the offspring?
Answer: C. 1 : 2 : 1Science - 6A homozygous tall pea plant (TT) is crossed with a homozygous short plant (tt). What fraction of the F1 generation will be tall, given that T is completely dominant?
Answer: A. All of themScience - 7Which of the following is NOT a function of the liver?
Answer: B. Secreting insulinScience - 8Which enzyme in saliva begins the digestion of starch?
Answer: C. AmylaseScience - 9Most absorption of digested nutrients occurs in the
Answer: A. small intestineScience - 10The movement of water across a selectively permeable membrane from a region of lower solute concentration to one of higher solute concentration is called
Answer: D. osmosisScience - 11Which of the following is an autotroph?
Answer: C. Green algaeScience - 12Atmospheric nitrogen is converted into a form usable by plants mainly through the action of
Answer: C. certain bacteriaScience - 13How many chromosomes are present in a normal human gamete?
Answer: B. 23Science - 14During which stage of mitosis do the chromosomes align along the equator of the cell?
Answer: B. MetaphaseScience