What initiates T cell activation?
What will be an ideal response?
T cell activation begins with a dendritic cell processing and displaying antigen fragments on its MHC molecules.
You might also like to view...
Poliovirus is an RNA virus of the picornavirus group, which uses its RNA as mRNA. At its end, the RNA genome has a viral protein (VPg) instead of a cap
This is followed by a nontranslated leader sequence, and then a single long protein-coding region (~7000 nucleotides), followed by a poly-A tail. Observations were made that used radioactive amino acid analogues. Short period use of the radioactive amino acids result in labeling of only very long proteins, while longer periods of labeling result in several different short polypeptides. What conclusion is most consistent with the results of the radioactive labeling experiment? A) Host cell ribosomes only translate the viral code into short polypeptides. B) The RNA is only translated into a single long polypeptide, which is then cleaved into shorter ones. C) The RNA is translated into short polypeptides, which are subsequently assembled into large ones. D) The large radioactive polypeptides are coded by the host, whereas the short ones are coded for by the virus.
Cellular respiration produces O2
1.True 2.False
The type of system depicted in the accompanying figure is a(n):
a. open circulatory system.
b. vertebrate circulatory system.
c. closed circulatory system.
d. lymph system.
e. open digestive system
The herbicides (weed killers) 2,4-D and 2,4,5-T are examples of synthetic:a
abscisic acid. b. auxins.
c. cytokinins. d. ethylene. e. gibberellins.