ATI Biology Practice Test 3

Question 1

Which phase of the cell cycle involves the actual division of the cytoplasm into two daughter cells?

Accepted Answer

Cytokinesis

Answer

Cytokinesis is the final stage of cell division where the cytoplasm splits, producing two separate daughter cells.

Question 2

What type of bond holds the two strands of DNA together in a double helix?

Accepted Answer

Hydrogen bonds

Answer

Hydrogen bonds between complementary base pairs (A-T and G-C) hold the two strands of the DNA double helix together.

Question 3

Which blood vessel carries deoxygenated blood from the heart to the lungs?

Accepted Answer

Pulmonary artery

Answer

The pulmonary artery carries deoxygenated blood from the right ventricle to the lungs for gas exchange.

Question 4

Which macromolecule serves as the primary long-term energy storage molecule in animals?

Accepted Answer

Triglycerides

Answer

Triglycerides (fats) are the primary long-term energy storage molecules in animals, storing more energy per gram than carbohydrates.

Question 5

In the Punnett square cross Tt x Tt, what percentage of offspring are expected to be homozygous recessive?

Accepted Answer

25%

Answer

In a monohybrid cross between two heterozygotes (Tt x Tt), 25% of offspring are expected to be homozygous recessive (tt).

HESI (ATI) Practice Test