HESI A2
HESI A2 Version 1 Biology Questions
Question 1 of 5
Which method of glucose conversion generates the most usable and efficient form of ATP within the human body?
Correct Answer: A
Rationale: Aerobic respiration generates the most ATP (around 36-38 ATP molecules per glucose molecule). It uses oxygen and occurs in the mitochondria, making it the most efficient way for the body to produce energy. In contrast, anaerobic respiration and fermentation produce significantly less ATP and are less efficient processes. Lactic acidosis is a medical condition involving the buildup of lactic acid in the body and is not a method of glucose conversion for energy production.
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
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 4 of 5
Which set is correctly listed for characteristic chromosome number, and most of their cells have a complete set of these chromosomes?
Correct Answer: D
Rationale: The correct order from largest to smallest is Phylum, Order, Genus, Species. In biological classification, the hierarchy of taxonomic ranks is structured such that phylum is the broadest category, followed by order, genus, and species, which is the most specific. When looking at the characteristic chromosome number, most cells have a complete set of chromosomes, and this order aligns with the genetic similarity and differences observed in organisms.
Question 5 of 5
Where in the cell does the Krebs cycle take place?
Correct Answer: A
Rationale: The Krebs cycle, also known as the citric acid cycle, occurs in the mitochondrion of eukaryotic cells. This cycle is a vital component of cellular respiration, where it is responsible for converting acetyl-CoA into ATP, NADH, and FADHā‚‚, contributing to energy production within the cell. The mitochondrion is often referred to as the powerhouse of the cell due to its role in generating energy through processes like the Krebs cycle.