Consider a genetic mutation which causes T helper cells to be unable to respond to stimulation by the cytokines which lead to TH2 differentiation. This mutation would cause a patient to be deficient in which activity?
A) production of memory cells
B) action of macrophage
C) production of antibodies
D) decrease of the immune response once the pathogen is eliminated
E) action of cytotoxic T cells
Answer: C
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What enzyme is produced by the human body following a snack on a donut?
A. Glucagon B. Insulin C. Both insulin and glucagon D. No enzyme is produced following a snack; enzymes are not triggered by food consumption.
Which of the following parasites must be swallowed twice by the human host, first as an egg and later as a larva?
A. Schistosoma mansoni B. Taenia saginata C. Enterobius vermicularis D. Necatur americanus E. Ascaris lumbricoides
The two organelles that contain their own nuclear genome are:
A. Golgi apparatus and mitochondria. B. endoplasmic reticulum and mitochondria. C. Golgi apparatus and endoplasmic reticulum. D. mitochondria and chloroplast. E. chloroplast and vacuole.
Due to the lack of an enzyme to break down lipids, excess accumulation of lipids in the brain leads to a human disease called Tay Sachs syndrome. Which organelle is likely to be the one that lacks the proper enzyme needed for lipid breakdown?
A. lysosome B. tonoplast C. mitochondrion D. Golgi apparatus E. peroxisome