All of the following are characteristics of IgM except
A. it contains a central J chain.
B. it has 10 antigen binding sites.
C. it is the first class synthesized by a plasma cell.
D. it is a dimer.
E. it can serve as a B-cell receptor.
Answer: D
You might also like to view...
Impetigo is caused by ________.
A. C. diphtheriae B. S. pyogenes C. C. perfringens D. S. aureus E. Both S. aureus and S. pyogenes are correct.
The showy feathers of a male peacock versus the plain feathers of a female peacock is an example of
A. sexual dimorphism. B. animal cognition. C. habituation. D. distraction display. E. piloting.
A dihybrid cross of two contrasting pure-breeding
organisms a. produces homozygous offspring. b. must produce a phenotype different from either pure-breeding parent. c. results in the disappearance of the recessive traits in the first generation. d. takes place only in the laboratory under precisely controlled conditions. e. will result in the immediate formation of another pure-breeding variety.
Imagine that a very unusual animal species had the ability to make its own aromatic amino acids using a 5-enolpyruvylshikimate-3-phosphate (EPSP) synthase enzyme similar to that of plants. What would happen if this animal foraged in a field of glyphosate-resistant plants?
A. They would also become glyphosate-resistant B. They would no longer need to make their own aromatic amino acids C. No effect D. They would become sick from the glyphosate that was sprayed on the plants