Question

question 19
if red blood cells containing 10% solute are placed in a solution containing 10% solute, what will happen?
nothing will happen.
water will move into the cells.
water will move out of the cells.
water will move into and out of the cells at equal rates.

question 20
the cell process in which microorganisms or other large particles are engulfed is called
pinocytosis.
secretion.
phagocytosis.
endocytosis.

question 21
a molecule or other agent that alters enzyme function by changing its shape is called a(n)
substrate.
end product inhibition.
allosteric effector.
proenzyme.

Explanation:

• Question 19: When red blood cells with 10% solute are in a 10% solute - solution, it's an isotonic environment. In an isotonic solution, there is no net movement of water as water moves into and out of the cells at equal rates due to equal solute concentrations on both sides of the cell membrane.
• Question 20: Phagocytosis is the process by which cells engulf microorganisms or other large particles. Pinocytosis is the engulfing of liquid, secretion is the release of substances from the cell, and endocytosis is a general term for the process of taking substances into the cell, with phagocytosis being a specific type for large - particle engulfing.
• Question 21: An allosteric effector is a molecule or agent that alters enzyme function by changing its shape. A substrate is a molecule upon which an enzyme acts, end - product inhibition is a regulatory mechanism, and a proenzyme is an inactive precursor of an enzyme.

Answer:

• Question 19: Water will move into and out of the cells at equal rates.
• Question 20: phagocytosis.
• Question 21: allosteric effector.