HESI A2
HESI A2 Version 1 Biology Questions
Question 1 of 5
Which disease is caused by a bacterium?
Correct Answer: B
Rationale: Strep throat is caused by the bacterium Streptococcus pyogenes. Unlike mumps, which is a viral infection, AIDS caused by the HIV virus, and the common cold usually caused by rhinoviruses, strep throat is specifically a bacterial infection that can be treated with antibiotics.
Question 2 of 5
If the zygomatic arch is broken, where is the fracture located?
Correct Answer: A
Rationale: The zygomatic arch, also known as the cheekbone, is a bony structure on the side of the face. A fracture in this area is classified as a facial fracture, making the correct location for the fracture in the face.
Question 3 of 5
Which cellular appendage enables cells to move through their environments?
Correct Answer: A
Rationale: "Flagellum" is a whip-like appendage that allows certain cells to move through their environment.
Question 4 of 5
Which genetic descriptor refers to an organism's actual appearance?
Correct Answer: A
Rationale: Phenotype refers to the observable characteristics or traits of an organism, including physical appearance, behavior, and physiological properties. It is influenced by the organism's genotype and environmental factors. Genotype, on the other hand, represents the genetic makeup of an organism, while homozygote refers to an individual having two identical alleles for a particular gene. Karyotype, on the other hand, refers to the complete set of chromosomes in an individual.
Question 5 of 5
Which combination of cell cycle phase and descriptor is correct?
Correct Answer: C
Rationale: The correct answer is C. The Gā‚‚ phase is the phase before mitosis within interphase where the cell grows in size and synthesizes proteins needed for cell division. Option A incorrectly describes the S phase, which is primarily for DNA synthesis. Option B is incorrect as the doubling of chromosomes does not occur in Gā‚� phase. Option D is inaccurate because interphase encompasses Gā‚�, S, and Gā‚‚ phases, during which the cell prepares for division by increasing its mass and organelles, rather than specifically focusing on mitosis preparation.