Members of the genus Thiothrix are sheathed bacteria that can replicate by releasing gonidia from the open end of the sheath.
Answer the following statement true (T) or false (F)
True
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Na+ ion concentrations are higher outside the cell than inside the cell. What type of transport system is required to move Na+ ions in and out of the cell?
A. Na+ moves into the cell by facilitated diffusion and out of the cell by active transport B. Na+ moves in and out of the cell by passive diffusion C. Na+ moves in and out of the cell by active transport D. Na+ moves into the cell by active transport and out of the cell by facilitated diffusion E. Na+ moves into the cell by facilitated diffusion and can not move out of the cell
Which cells stimulate B cells to divide and produce antibodies?
a. mast cells b. macrophages c. NK cells d. TC cells e. TH cells
Sulfur has an atomic number of 16 and a mass number of 32. How many electrons are needed to complete the valence shell of a sulfur atom?
A) 0 B) 1 C) 2 D) 6 E) 8
The receptor for a peptide hormone _______.
a. sits in the cell's outer membrane and binds to a hydrophobic hormone b. sits in the cell's outer membrane and binds to a hydrophilic hormone c. sits inside the cell and binds to a hydrophobic hormone d. sits inside the cell and binds to a hydrophilic hormone