All of the following are components of the adherens junction complex EXCEPT
A. intermediate filaments.
B. linker protein.
C. cadherins.
D. Ca2+.
E. actin filaments.
Answer: A
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In a two-dimensional gel electrophoresis experiment, proteins are separated horizontally by ____
A. amino acid sequence B. molecular mass C. abundance D. isoelectric point
Answer the following statements true (T) or false (F)
1.When fluid enters the collecting duct, it is called urine. 2.An endotherm typically will have a larger nasal cavity than an ectotherm of equivalent mass. 3.Urine leaves the collecting duct and travels to the ureter. 4.Fever is part of humoral immunity since the temperature of the body is controlled from the bone marrow. 5.A doctor who attempts to induce a fever in a patient might be trying to help fight a pathogen or a cancer.
The presynaptic neuron and postsynaptic neuron do not directly contact each other because
a. one would inhibit the actions of the other. b. they never grow to sufficient length. c. the synaptic vesicles keep them apart. d. this would cause continuous impulse transmission. e. acetylcholine prevents this action.
DNA sequences called __________ increase the rate of RNA synthesis after initiation of transcription
a. promoters b. TATA boxes c. UPEs d. enhancers e. regulators