In what part of the cell does a polar signaling molecule bind its receptor? A nonpolar signaling molecule? Explain
your reasoning. What will be an ideal response?
Polar signaling molecules bind membrane receptors whereas nonpolar bind cytoplasmic
receptors.Polar signaling molecules are hydrophilic and cannot cross the plasma membrane.
Nonpolar signal molecules are hydrophobic and able to cross the plasma membrane to bind a
cytoplasmic receptor
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A nepron
a. is a kidney tubule. b. cleanses the blood. c. forms urine. d. connects the kidneys to the bladder. e. is all of these except d.
What organelle is the site of ATP production?
a. nucleus b. mitochondria c. peroxisomes d. lysosomes e. Golgi body
Endosymbiotic theory is best supported by which characteristics of cells?
A) organelles with their own DNA B) double membrane organelles C) organelles that have bacteria-like properties D) all of these
Which environmental factor has a direct effect on an organism's rate of water loss by evaporation?
A) insect biodiversity B) wind C) plant pollination rates D) algae abundance