Question 1
pts
Which statement is NOT true of diffusion?
The process requires a concentration gradient.
The particles diffuse faster when the concentration gradient is steep.
The uncharged particles also move down electrical gradients.
Each particle moves down its own concentration gradient.
The process requires ATP.
Question 2
pts
Which structure gives rise to microtubules?
intermediate filaments
flagella
collagen
, microfilaments
centrioles
Question 3
pts
What major factor limits cell size?
The rate at which it can process nutrients
The rate at which it can remove wastes
The size of the nucleus
The surface area to volume ratio
The size of the plasma membrane
Question 4
pts
The term substrate is synonymous to the term ____.
enzyme
end product