What is antigen presentation? Why is antigen presentation important for long-term immunity?
What will be an ideal response?
Answer: Antigen presentation is the transportation and display of MHC-embedded peptides to the phagocyte surface after ingestion and degradation to small peptides by APCs. The MHC-peptide complex is then the target for T helper cells that will activate other immune cells in the adaptive immune response. This immune response will be specifically targeted towards the antigen that was presented by the phagocyte. The adaptive immune response generates memory B cells and T cells that provide long-lasting immunity towards any foreign particle that has this antigen.
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A catalyst
A) requires more reactants but makes the reaction rate faster. B) increases the amount of reactants produced but does not change the rate. C) changes the rate of the reaction but does not change the end amount of products. D) changes both the rate of a reaction and the amount of the product that will be obtained as the reaction is completed.
Helicase PcrA follows classic Michaelis-Menten kinetics. In this reaction, ATP serves as a substrate for hydrolysis, while the DNA is most appropriately called the _____________
A. product. B. substrate. C. intermediate. D. coenzyme. E. ligand.
The range of phenotypic possibilities that can develop from a certain dog genotype under different
environmental conditions is called the:a. epistatic interaction. b. norm of reaction. c. nurture limit. d. genotype range. e. maximum phenotype
Arrange the following neurons into the correct sequence for information flow during the withdrawal reflex following touching a hot burner on a stove
A) interneuron, motor neuron, sensory neuron B) motor neuron, sensory neuron, interneuron C) sensory neuron, interneuron, motor neuron D) motor neuron, interneuron, sensory neuron