BIOCHEM MIDTERM EXAM 2026/2027 COMPLETE QUESTIONS WITH ANSWERS GUARANTEED PASS | RATED A+

BIOCHEM MIDTERM EXAM 2026/2027 COMPLETE QUESTIONS WITH ANSWERS GUARANTEED PASS | RATED A+
A 19-year-old male is being evaluated for muscle weakness. Evaluation of a muscle biopsy
revealed normal rates of succinate oxidation but very low rates of pyruvate oxidation. Further
testing determined normal levels of enzymatic activity in both malate dehydrogenase and
pyruvate dehydrogenase. Based on this data, the patient may have a mutation in a gene encoding
for which mitochondrial protein?
a. Complex I (NADH Q-oxidoreductase)
b. Complex II (succinate Q-reductase)
c. Complex III (Q-cyt c oxidoreductase)
d. Complex IV (Cytochrome c oxidase)
e. Complex V (ATP synthase) - Answer>>> a. Complex I (NADH Q-oxidoreductase)
A 9-month-old girl is suffering from vomiting, lethargy, and poor feeding behavior. Her mother
reports that the symptoms began shortly after the baby was given some cereal and mashed
bananas by her grandparents. The baby's symptoms seemed to resolve after breastfeeding was
resumed. Which of the following is the most likely diagnosis?
a. Deficiency of an enzyme in the metabolism of pentose sugars
b. Intolerance of dietary fructose
c. Deficiency of an enzyme in the pathway that metabolizes glucose
d. Intolerance to dietary galactose - Answer>>> b. Intolerance of dietary fructose
Caffeine is a natural inhibitor of phosphodiesterase. If you were to consume a large amount of
coffee you would likely see a prolonged response to which of the following stimulants or
hormones?
a. Insulin
b. Glucose
c. Cortisol
d. Glucagon - Answer>>> d. Glucagon