The antigen-binding variable region assembled by a B cell occurs in both its antibody molecule and its (BCR/CD8/MHCII) molecule.
Fill in the blank(s) with the appropriate word(s).
BCR
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How do spheroplasts and protosplasts differ?
A. Spheroplasts retain the peptidoglycan but protoplasts do not. B. Spheroplasts retain their outer membrane but protoplasts do not. C. Spheroplasts form from cocci and protoplasts form from bacilli. D. There is no difference; these terms are synonyms.
Life forms exhibit both unity and diversity. Which of the following best demonstrates the unity among all organisms?
A. The three domains of life. B. Emergent properties. C. Amino acids are the building blocks of proteins. D. Natural selection.
If you wanted to manufacture a fat, which one of the following would be necessary?
A. water B. amino acids C. vitamins D. glycerol
Bony fishes possess a swim bladder to
A. regulate their buoyancy. B. detect changes in water pressure. C. cleanse the blood of toxins. D. store urine until excreted. E. regulate oxygen concentrations in their blood.