Biology HESI A2 Practice Test - Nurselytic

Correct Answer: A

Rationale: The Coriolis effect is the effect of the Earth's rotation on the atmosphere and on all objects on the Earth's surface. It causes moving objects and currents to be deflected to the right in the northern hemisphere and to the left in the southern hemisphere. This deflection is a result of the rotation of the Earth and plays a crucial role in influencing weather patterns and ocean currents around the globe. The other choices provided are incorrect. The Corona effect is related to the Sun's atmosphere, the Archimedes effect involves buoyancy in fluids, and the tidal effect is associated with the gravitational forces between the Earth, the Moon, and the Sun.

Correct Answer: A

Rationale: The correct match for the DNA segment ACTTGCA is TGAACGT. In DNA, adenine (
A) always pairs with thymine (T), and cytosine (
C) always pairs with guanine (G).
Therefore, the complementary strand to ACTTGCA should be TGAACGT, making choice A the correct answer.
Choice B (GACCATG) does not follow the base pairing rules; hence, it is incorrect.
Choice C (ACTTGC
A) is the original segment, not its complementary strand.
Choice D is incorrect as well because a matching strand does exist.

Correct Answer: A

Rationale: The apical side of an epithelial cell is the top side, which is typically exposed to fluids, air, or the inside of an organ. This side allows substances to pass through it, facilitating the absorption, secretion, or excretion of various substances.
Choice B is incorrect as the apical side is not on the bottom but the top side.
Choice C is incorrect as the apical side does allow substances to pass through.
Choice D is incorrect as there are characteristics associated with the apical side.

Correct Answer: D

Rationale: The correct answer is D: The endocrine system. The endocrine system maintains the body's balance through the release of hormones directly into the bloodstream. Hormones produced by glands in the endocrine system regulate various bodily functions such as metabolism, growth, and reproduction. This system plays a crucial role in maintaining homeostasis by releasing hormones that help control and coordinate different processes in the body.

Choices A, C, and B are incorrect. The gastrointestinal system is responsible for digestion, absorption of nutrients, and excretion of waste; the digestive system includes the gastrointestinal system and other accessory organs; and choice B is a duplicate of the correct answer.

Correct Answer: C

Rationale: The correct answer is C: Uracil. Uracil is not a DNA base; it is a base found only in RNA. The four bases in DNA are Adenine, Thymine, Cytosine, and Guanine.
Choice A, Adenine, is a correct DNA base.
Choice B, Thymine, is a correct DNA base.
Choice D, Cytosine, is a correct DNA base.
Therefore, Uracil is the only incorrect choice among the options provided.