HESI A2
HESI A2 Version 1 Biology Questions
Question 1 of 5
Which term means a group of similar cells combined to perform a common function?
Correct Answer: A
Rationale: The correct answer is 'Tissue.' Tissue is a group of similar cells that work collectively to carry out a specific function. These specialized cells combine to form tissues, which further combine to create organs. Organs then collaborate within systems in the body to maintain balance (homeostasis) and perform various functions such as digestion, circulation, and respiration.
Question 2 of 5
Where is the slide placed on a light microscope?
Correct Answer: A
Rationale: In a light microscope, the slide is placed on the stage, which is a flat platform designed to hold the specimen being observed. The stage provides stability for the slide and allows for adjustments to focus the lens on the specimen. The arm, lens, and base have specific functions in the operation of the microscope but are not where the slide is placed.
Question 3 of 5
What structure in a plant cell acts as a barrier and provides support to the cell?
Correct Answer: D
Rationale: The cell wall is the correct answer. It acts as a rigid barrier that surrounds the plant cell membrane, providing structural support and protection. Plant cells have cell walls, unlike animal cells, which give them their shape and rigidity.
Question 4 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 5 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.