Magnetoreceptors ____
a. are well characterized and understood
b. are known to rely on the mineral magnetite
c. help many types of animals navigate long distances
d. have been studied only in homing pigeons
e. have been studied primarily in moths
ANSWER: c
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What is most closely associated with membrane-attack complexes (MACs)?
a. complement proteins b. helper T cells c. B cells d. histamines e. cytokines
When body temperature drops below normal, a person starts shivering uncontrollably. This is an example of negative feedback.
Answer the following statement true (T) or false (F)
The cysts of Giardia function most like the _____
A) mitochondria of ancestral diplomonads B) nuclei of archaeans C) endospores of bacteria D) capsids of viruses
Which of the following choices reflects the appropriate order of locations through which a protein destined for the plasma membrane travels?
(a) lysosome -> endosome -> plasma membrane (b) ER -> lysosome -> plasma membrane (c) Golgi -> lysosome -> plasma membrane (d) ER -> Golgi -> plasma membrane