Silicon is an element that is found directly underneath carbon in the periodic table and thus has similar properties to carbon, including electron orbitals. How many electrons are in the valence shell of a silicon atom?
A) 1
B) 2
C) 4
D) 6
Answer: C
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Cholera produces severe diarrhea by ____
a. increasing the rate at which cells pump out ions b. decreasing osmosis in small intestinal cells c. blocking ATP production d. increasing water pumps in small intestinal cells e. blocking sodium and potassium channels
Which of the following is the correct sequence of events for an altered protein that is secreted from the cell?
A. Golgi apparatus - ribosome - plasma membrane B. Golgi apparatus - smooth endoplasmic reticulum - plasma membrane C. nucleus - smooth endoplasmic reticulum - Golgi apparatus D. rough endoplasmic reticulum - Golgi apparatus - plasma membrane E. smooth endoplasmic reticulum - plasma membrane - Golgi apparatus - ribosome
The production of (exotoxin/coagulase/hyaluronidase) enzyme breaks down connections between cells, allowing Streptococcus pyogenes to invade tissue and cause necrotizing fasciitis
What will be an ideal response?
A drug is structurally similar to PABA and inhibits folic acid synthesis. It is most likely a(n)
A) nucleic acid analog. B) penicillin. C) tetracycline. D) azole. E) sulfonamide.