Question 1

Which of the following best describes an amphibolic pathway in metabolism?

Accepted Answer

A pathway that can function both in the synthesis and breakdown of molecules, integrating anabolic and catabolic processes.

Question 2

During the fed state, which hormone predominates and what is its primary effect on glucose metabolism?

Accepted Answer

Insulin; stimulates glycogenesis and glycolysis.

Question 3

Which of the following equations correctly represents the net ATP yield from the complete aerobic oxidation of one molecule of glucose?

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 \rightarrow 6CO_2 + 6H_2O + 32ATP$$

Question 4

A patient presents with jaundice and elevated serum bilirubin. Which metabolic pathway is most likely disrupted?

Accepted Answer

Haeme degradation

Question 5

Which vitamin acts as a coenzyme in transamination reactions and is essential for amino acid metabolism?

Accepted Answer

Vitamin B6

Question 6

Which of the following best explains why fungal infections are generally more difficult to treat than bacterial infections?

Accepted Answer

Fungi are eukaryotic and share more cellular similarities with human cells, limiting drug specificity.

Question 7

Which of the following statements about the pentose phosphate pathway is correct?

Accepted Answer

It generates NADPH and ribose-5-phosphate for biosynthetic reactions.

Question 8

A patient with galactosemia is unable to metabolize galactose properly. Which enzyme deficiency is most commonly responsible for this condition?

Accepted Answer

Galactose-1-phosphate uridyltransferase

Question 9

Which of the following best describes the Warburg Effect observed in cancer cells?

Accepted Answer

Increased glycolysis and lactate production even in the presence of oxygen.

Question 10

Which laboratory technique is most appropriate for determining the antibiotic susceptibility of a bacterial isolate?

Accepted Answer

Kirby-Bauer disk diffusion method

Question 11

Which of the following equations represents the urea cycle's role in nitrogen elimination?

Accepted Answer

$$2NH_3 + CO_2$ + 3ATP + H_2O \rightarrow urea + 2ADP + 4Pi + AMP$$

Question 12

Which of the following is a key difference between Gram-positive and Gram-negative bacteria?

Accepted Answer

Gram-positive bacteria have a thick peptidoglycan layer and lack an outer membrane.

Question 13

Which of the following best describes the mechanism of action of penicillin?

Accepted Answer

Disrupts bacterial cell wall synthesis by inhibiting transpeptidase enzymes.

Question 14

Which of the following is a clinical application of measuring glycated haemoglobin (HbA1c)?

Accepted Answer

Monitoring long-term glucose control in diabetic patients.

Question 15

Which of the following best explains why biofilms contribute to chronic infections and antibiotic resistance?

Accepted Answer

Biofilms physically protect bacteria from antibiotics and immune cells.

Question 16

Which of the following statements about the complement system is correct?

Accepted Answer

It is a cascade of plasma proteins that enhances immune responses and promotes pathogen lysis.

Question 17

A patient with kwashiorkor is most likely suffering from which metabolic imbalance?

Accepted Answer

Deficiency of dietary protein leading to negative nitrogen balance

Question 18

Which of the following best describes active immunity?

Accepted Answer

Immunity developed after exposure to an antigen or vaccination.

Question 19

Which of the following is a primary function of MHC molecules in the immune system?

Accepted Answer

Presenting antigenic peptides to T cells for immune recognition.

Question 20

Which of the following best explains the clinical significance of serum lipoprotein measurement?

Accepted Answer

It helps assess cardiovascular disease risk by evaluating lipid transport and metabolism.

Pharmaceutical Biochemistry, Microbiology, and Immunology: Course Outline and Study Guide

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