Which of the following best distinguishes rough ER and smooth ER?
Answer: Rough ER synthesizes and processes proteins, many which will be secreted or exported.
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Which of the following could be the cause of the 12 year old boy’s condition, pictured here to the right of his mother?
1.acromegaly
2.a benign pituitary tumor
3.GH receptors failed to properly respond during childhood
4.GH failed to surge as it normally should during the teenage years
What characterizes a thermocline in a temperate zone lake?
1.The layer above it is warm and has lots of oxygen. 2.The layer below it contains the warmest water. 3.It occurs in the spring as the air warms and ice melts. 4.It is very rich in oxygen.
Which of the following statements regarding ricin is correct?
A) Ricin is five times more lethal than botulinum. B) Ricin is highly communicable only if it is inhaled. C) Calcium chloride is the preferred antidote for ricin. D) Ricin is extremely toxic by many routes of exposure.
What are fimbriae, and what is their function?
A. They are long, thin appendages that allow bacteria to be motile (move). B. They are a thick, gelatinous substance surrounding some bacterial cells that allow them to stick to surfaces and protect them from phagocytic white blood cells. C. They are elongated, hollow appendages that allow for the transfer of DNA. D. They are small, circular pieces of DNA that frequently contain genes for antibiotic resistance. E. They are stiff fibers that allow bacteria to adhere to surfaces.