At which level of protein structure are interactions between the side chains (R-groups) most important?
A) primary
B) secondary
C) tertiary
D) quaternary
E) primary, secondary, tertiary, and quaternary
Answer: C
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All of the following are general components of the growth factor signaling pathway EXCEPT
A. tyrosine kinase-linked receptor. B. GRB2-Sos-Ras complexes. C. phosphorylated transcription factors. D. Raf-1. E. IP3 and Ca2+.
Amnesia is common after surgery due to the drugs used to anesthetize the patient. Which brain region is most affected
by these drugs to cause this symptom?
a. brain stem b. Broca's area c. limbic association cortex d. prefrontal association cortex e. parietal-tempora-occipital association cortex
Which list of traits is characteristic of the ecdysozoans?
A. Periodically shed their outer covering, nonsegmented body plan and contain a layer of jellylike fluid called mesoglea, contain an exoskeleton, and undergo metamorphosis. B. Periodically shed their outer covering, segmented body plan and pseudocoelom on some, contain an endoskeleton, and undergo metamorphosis. C. Periodically shed their outer covering, nonsegmented body plan and pseudocoelom on some, contain an exoskeleton, and undergo metamorphosis. D. None of the these are correct.
Answer the following questions true (T) or false (F)
1. The genome of all DNA animal viruses is replicated in the nucleus of the cell. 2. Bacteriophage release is a gradual process in which small numbers are released at a time. 3. Bovine spongiform encephalopathy is an example of a prion disease.