Select all that are correct or necessary for a nk cell to recognize that a cell under surveillance is infected with a virus.
the inhibitory receptor must be engaged.
there are fewer mhc molecules on the surface of the infected cell.
there are more mhc molecules on the surface bearing peptides from the virus.
the activating receptor must be engaged.

True or false: (a) the strings of little red dots represent carbohydrates. (b) the model is called a bilayer because there are two main types of molecules present, lipids and proteins. (c) the many black lines represent amino acid tails. (d) this model shows membrane transport. (e) the blue ovals are hydrophobic. (f) the blue ovals represent phospholipid heads.