Bacteriophages attach to the cell walls of bacteria by envelope proteins
____________________ Indicate whether the statement is true or false.
F, tail fibers
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Suppose a cell's membrane is permeable to water, but not to Na+ or Cl? or any other solute. The NaCl concentration is
higher outside the cell than inside the cell, and the osmolarity of the cell is higher than that of the solution surrounding the cell. What will occur?
a. Overall, the cell will lose water. b. Overall, the cell will take up water, Na+, and Cl?. c. Overall, the cell will take up water. d. Overall, the cell will take up water and lose Na+ and Cl?. e. Overall, the cell will lose water and take up Na+ and Cl?.
What is true of chilopods?
a. They consume a vegetarian diet. b. They have four legs per segment. c. They use poison to hunt prey. d. They have circular cross-sections.
Satiety that is specific to the particular foods that produce it is called ______-_______ satiety.
Fill in the blank(s) with the appropriate word(s).
A nonfunctional CD4 protein on a helper T cell would result in the helper T cell being unable to _____
A) respond to T-independent antigens B) lyse tumor cells C) stimulate a cytotoxic T cell D) interact with a class II MHC-antigen complex