HESI A2
HESI A2 Version 1 Biology Questions
Question 1 of 5
Which cell organelle can be functionally compared to a door of a house?
Correct Answer: B
Rationale: The cell membrane can be likened to a door of a house because it functions to regulate what enters and exits the cell, maintaining internal balance (homeostasis) and safeguarding the cell's interior. Just as a door controls access to a house, the cell membrane controls the passage of substances into and out of the cell, thereby playing a crucial role in maintaining the cell's integrity and functionality.
Question 2 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 3 of 5
What is the purpose of cellular respiration?
Correct Answer: D
Rationale: The correct answer is D. The primary purpose of cellular respiration is to obtain energy in the form of ATP. During cellular respiration, glucose and other organic molecules are broken down to release energy in the form of ATP, which is crucial for various cellular functions and activities. This energy is used by cells to carry out processes such as growth, repair, movement, and maintaining homeostasis.
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
Aerobic respiration occurs in the presence of what necessary molecule?
Correct Answer: D
Rationale: Oxygen is essential for aerobic respiration as it acts as the final electron acceptor in the electron transport chain, producing ATP