HESI A2
HESI A2 Version 1 Biology Questions
Extract:
Question 1 of 5
What process of division do sex cells undergo?
Correct Answer: D
Rationale: The correct answer is D: Meiosis. Sex cells undergo meiosis, which is a specialized form of cell division that reduces the chromosome number by half to produce gametes (sperm and egg cells). This process involves two rounds of division (meiosis I and II) resulting in four haploid daughter cells. A: Mitosis is a form of cell division where a cell divides to produce two identical diploid daughter cells, not sex cells. B: Binary fission is a form of asexual reproduction in prokaryotes, not a process of division for sex cells. C: Facilitated division is not a recognized term in biology and is not related to the division of sex cells.
Question 2 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 3 of 5
What cellular appendage enables cells to move through their environments?
Correct Answer: A
Rationale: The flagellum is a whip-like appendage found in certain cells like sperm cells and some bacteria, enabling them to move through their environments. It plays a crucial role in locomotion by allowing cells to swim or propel themselves in liquids, aiding in their movement and navigation.
Question 4 of 5
What process do sex cells undergo to reproduce?
Correct Answer: A
Rationale: Sex cells, also known as gametes, undergo the process of meiosis to reproduce. Meiosis is a specialized type of cell division that reduces the chromosome number by half, resulting in the formation of four genetically diverse haploid cells from a diploid cell. This reduction is essential for sexual reproduction to ensure genetic diversity in the offspring.
Question 5 of 5
How does the concentration of solutes in a hypertonic solution compare to the cell's?
Correct Answer: C
Rationale: In a hypertonic solution, the concentration of solutes is higher compared to the cell's interior. This causes water to move out of the cell to balance the solute concentrations, resulting in the cell shrinking. Therefore, the correct answer is that the solute concentration is higher in a hypertonic solution than inside the cell.