Practice Questions

A molecular biologist is studying the structure of DNA. They recall that the two strands of the DNA double helix are held together by hydrogen bonds between complementary base pairs. Which base pairing correctly describes this interaction?

A. Adenine with Guanine, Cytosine with Thymine
B. Adenine with Thymine, Cytosine with Guanine
C. Adenine with Cytosine, Guanine with Thymine
D. Adenine with Uracil, Cytosine with Guanine
nmdcat.online Bio chemistry for nurses
Jun 6, 2026

A biochemist is studying a newly discovered enzyme. They observe that as the substrate concentration increases, the reaction rate initially increases rapidly but then plateaus. This plateau indicates that the enzyme has reached its maximum velocity (Vmax?), which is defined as:

A. The substrate concentration at which the reaction rate is half of Vmax?
B. The initial rate of reaction
C. The reaction rate when all enzyme active sites are saturated with substrate
D. The point at which the enzyme begins to denature
nmdcat.online Bio chemistry for nurses
Jun 6, 2026
nmdcat.online Bio chemistry for nurses
Jun 6, 2026

200. You are responding to a patient with acute onset shortness of breath and an audible wheeze. What is the immediate action?

A. Administer a bronchodilator (if ordered/protocol), apply oxygen, and elevate head of bed
B. Place the patient supine
C. Give a sedative
D. Encourage deep coughing
nmdcat.online BS Nursing
Jun 6, 2026

199. A client in a therapy session describes hearing voices that tell them to do things. What is your immediate clinical priority?

A. Explore the content of the voices, specifically if they are commanding harm to self or others
B. Tell them the voices are not real
C. Ignore the voices
D. Document the voices and proceed as usual
nmdcat.online BS Nursing
Jun 6, 2026
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