HESI A2 Biology practice reviews cell structure, genetics, and basic biological processes that underlie later physiology coursework.
Human cells need oxygen for respiration. What system of the body is responsible for transporting an oxygen molecule to different locations throughout the body?
Two parents both carry the recessive gene for cystic fibrosis (each is a heterozygous carrier, Cc). Any homozygous recessive (cc) offspring will manifest the disease. What percentage of the offspring is predicted to be carriers (heterozygous) but not manifest the disease?
Hemophilia is a sex-linked recessive trait carried on the X chromosome. If a male with hemophilia (X^h Y) has children with a female carrier (X^H X^h), what ratio of the offspring is predicted to have the disease?
A cell is placed in a solution where the concentration of solutes is higher inside the cell than outside the cell (i.e., the surrounding solution is hypotonic relative to the cell). What would you expect to happen to the cell?
What is the meaning of the word "pathogens" as it is used in the first paragraph?
Based on the inherent properties of water molecules, what effect would a large body of water have on the temperature of a nearby climate?
Which molecules are responsible for the base-pairing action in DNA?
Which of the following is the molecule found in red blood cells (RBCs) that binds up to four oxygen molecules?
If bacteria are placed in a strong solution of salt water, they will shrink as water moves out of the bacteria. What is this process called?
Consider a prokaryotic organism that typically lives in a 10 percent saline environment. Which of the following surrounding solutions would cause the organism to lose mass at the greatest rate due to osmosis?
At the end of which phase of the cell cycle do chromosomes first become clearly visible (condensed) under a light microscope?
Which of the following is an example of a cell created by meiosis?
Once you're comfortable with biology, try a full HESI A2 practice test to see how it holds up under timed, mixed-section conditions, or head back to all HESI A2 categories.