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Practice Questions

A student is tasked with drawing the basic structure of an amino acid. They correctly identify that all amino acids found in proteins contain a central carbon atom bonded to an amino group, a carboxyl group, a hydrogen atom, and a unique side chain (R-group). The R-group primarily determines the amino acid’s:

A. Melting point
B. Size
C. Polarity and chemical properties ✓
D. Molecular weight
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

A patient with uncontrolled diabetes is experiencing severe muscle weakness and fatigue. Biochemically, this could be linked to an impaired ability of cells to generate ATP effectively through glucose oxidation. Which of the following molecules directly acts as the primary energy currency of the cell?

A. Glucose
B. ADP
C. AMP
D. ATP ✓
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

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
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

A dietician is explaining the importance of different types of fats in the diet. They describe a lipid molecule composed of a glycerol backbone esterified to three fatty acids. This molecule is commonly known as a:

A. Phospholipid
B. Steroid
C. Triglyceride ✓
D. Waxes
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

A clinical scenario involves a patient with a genetic defect affecting a mitochondrial enzyme crucial for aerobic respiration. Which of the following metabolic pathways would be most directly and significantly impacted by this defect?

A. Glycolysis
B. Pentose Phosphate Pathway
C. Krebs Cycle (Citric Acid Cycle) ✓
D. Glycogenesis
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

A medical student is learning about the different types of carbohydrates. They identify a polysaccharide that serves as the primary storage form of glucose in animals, predominantly found in the liver and muscles. This polysaccharide is:

A. Starch
B. Cellulose
C. Glycogen ✓
D. Chitin
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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
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nmdcat.online Bio chemistry for nurses
Jun 6, 2026

A patient presents with severe metabolic acidosis. The body’s buffer systems are crucial in maintaining blood pH within a narrow range. Which of the following is the most important extracellular buffer system in human blood?

A. Phosphate buffer system
B. Protein buffer system
C. Bicarbonate-carbonic acid buffer system ✓
D. Ammonia buffer system
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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
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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
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nmdcat.online BS Nursing
Jun 6, 2026
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