Ras proteins are of interest to researchers because of their role in ____
a. reproduction
b. linking plant hormones to germination
c. the development of many types of cancer
d. relieving cluster headaches
e. eliciting the fight-or-flight response
ANSWER: c
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Match the type of membrane protein with its function. Responses may be used multiple times or not at all. a. anchor b. transporter c. enzyme d. receptor
___ allows for the movement of ions across a membrane ___ attaches to another protein ___ binds signals from outside the cell ___ facilitates the movement of molecules across the membrane What will be an ideal response?
The thick filament is composed almost entirely of _____ molecules.
A. actin B. myosin C. troponin D. tropomyosin E. thrombin
Cellulose is ____.
A. a polysaccharide found in cell walls of plants B. a component of cell membranes C. an oligosaccharide found in animals D. formed by hydrolysis of monosaccharides E. a component of invertebrate exoskeletons
When physical barriers are broken down, which of the following is the human body's next line of defense against infection or disease?
What will be an ideal response?