Suppose that Joe Scientist fuses a mouse cell and a human cell, and then treats the cell with specific antibodies covalently linked to fluorescent dyes (antibodies linked to mouse proteins are green; antibodies linked to human proteins are red). What will the cell look like immediately after labelling?
a. The red and green fluorescent labels will be uniformly distributed across the entire membrane of the cell.
b. The cell will be half red and half green.
c. The red and green labels will be distributed in the cell in intermingled patches.
d. The red and green labels will flash in the cell intermittently
Ans: b. The cell will be half red and half green.
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The ability of TCÂ cells to initiate apoptosis in virally-infected cells and cancer cells is dependent on their ability to produce ________ and ________; proteins that punch holes in the target cell membrane.
A. antibodies; interferons B. interleukin-1; interleukin-2 C. interferon; interleukins D. perforin; granzyme
Refer to Figure 44-4. A significant decrease in the protein level of the blood will result in interstitial edema because the fluid movement along which arrow is decreased?
a. 1
b. 2
c. 4
d. 5
The nuclear envelope is continuous with the
a. mitochondrial outer membrane. b. rough endoplasmic reticulum. c. Golgi apparatus. d. plasma membrane.
Reassortment of a virus that results in antigenic shift most commonly occurs in
a. adults. b. any animal infected with more than one virus strain. c. children. d. domesticated animals.