Which term best describes the structure that is necessary for facilitated diffusion?
a. a receptor protein
b. a pore
c. a signal protein
d. a carrier protein
Ans: d. a carrier protein
You might also like to view...
A concept presented by Charles Lyell, called ____, contendsthe geological processes that sculpted Earth’s surface
over long periods of time are exactly the same as the processes observed today
a. catastrophismb. sedimentation c. orthogenesis d. gradualism e. uniformitarianism
The gut cavity may be a fully lined coelom or a partially lined __________. Fill in the blank(s) with the appropriate word(s)
Which of the following bridges the gap
between a neuron sending a message and the neuron receiving it? a. threshold value b. action potential c. transmitter molecules d. a neurohormone e. all of these
Which type of base-pair substitution mutation has no effect on the amino acid sequence of a protein?
A) Missense mutation B) Nonsense mutation C) Silent mutation D) Frameshift mutation E) None of these choices