Chapter 3 Quiz Flashcards
know how to label the cell
page 63
know how to label plasma membrane
page 64
simple diffusion
nonpolar and lipid soluble substances diffuse directly through the lipid bi layer
which of the following would not diffuse through the plasma membrane by means of simple diffusion?
glucose
which cell component helps to maintain the structural integrity of the cell?
cytoskeleton
cytoskeleton
it acts as cells bones, muscles and ligaments by supporting cellular structures and providing the machinery to generate various cell movements
During which phase of the cell cycle does DNA duplication, or replication, take place?
Interphase
When a double helix of DNA is replicated, two complete helices are formed. Together, these helices are called sister __________.
chromatids
During which phase of mitosis do sister chromatids line up at the center of the cell?
metaphase
During which phase of mitosis do the sister chromatids move apart?
anaphase
During which phase of mitosis do nuclear envelopes and the nucleoli reappear?
Telophase
During which phase of mitosis do the nuclear envelope and nucleoli disappear?
prophase
What is the name of the process by which the cytoplasm divides in two?
cytokinesis
A primary active transport process is one in which __________.
molecules move through transport proteins that have been activated by ATP
Some transport processes use transport proteins in the plasma membrane, but do not require ATP. This type of transport is known as _____.
facilitated diffusion
The majority of water molecules moving across plasma membranes by osmosis do so via a process that is most similar to ____.
facilitated diffusion
The sodium-potassium pump uses ATP to move sodium and potassium ions across the plasma membrane. This statement describes _____.
primary active transport