HESI A2
HESI A2 Version 1 Biology Questions
Question 1 of 5
Which vitamin is recognized for its healing antioxidant properties?
Correct Answer: C
Rationale: Vitamin A is well-known for its antioxidant properties, essential for healing, maintaining healthy skin and tissues, and supporting the immune system. It plays a vital role in repairing damaged tissues, making it crucial for overall health and facilitating healing processes.
Question 2 of 5
In the human life cycle, only sperm and eggs have which number of chromosomes?
Correct Answer: D
Rationale: In humans, sperm and egg cells are haploid, meaning they contain half the number of chromosomes (23) compared to diploid cells (46). This reduction in chromosome number is essential for sexual reproduction, allowing the formation of a diploid zygote upon fertilization. Haploid cells carry only one set of chromosomes, which is necessary for genetic diversity and the fusion of genetic material during fertilization.
Question 3 of 5
Which term means alternate forms of a gene for the same trait?
Correct Answer: B
Rationale: Alleles are different versions of a gene that can exist for a given trait. For example, a gene for flower color may have a red allele and a white allele, representing the alternate forms of that gene. Genotypes refer to the genetic makeup, while phenotypes refer to the observable traits.
Question 4 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 5 of 5
The cellular membrane consists of a bilayer of which substances?
Correct Answer: B
Rationale: The cellular membrane is primarily composed of a phospholipid bilayer, forming the structure that regulates entry and exit.