This document contains a quiz on cell biology concepts. It includes multiple choice questions about passive transport mechanisms like diffusion and osmosis, cell organelles like the nucleus and ribosomes, structures in plant and animal cells like the cell wall and cell membrane, and functions of membrane proteins.

1. Buy here:
http://student.land/bi-101-unit-3-quiz/
Movement of particles from higher to lower concentration is
active transport.
diffusion.
osmosis.
passive
transport.
Which component of a cell membrane is likely to function as a receptor in cell to cell
signaling?
lipids

2. proteins
carbohydrat
es
cholesterol
The cell organelle that stores DNA and synthesizes RNA
mitochondr
ia
rough ER
ribosomes

3. nucleus
Provides structure and support in plant cells:
a nuclear
envelope.
a cell membrane.
cell wall.
cytoskeleton.
The cell junctions respectively that exclude the passage of water between cells, maintain
tissue form and strength, and allow the exchange of small molecules between cells are:

4. gap junctions, desmosomes, tight
junctions
desmosomes, tight juctions, gap
junctions
gap junctions, tight junctions,
desmosomes
tight junctions, desmosomes, gap
junctions
Briefly define osmosis and diffusion, being sure to explain how they are different and how
they are similar.
Both diffusion and osmosis involve movement of water molecules across cell
membranes, but diffusion spreads out the molecules evenly into the available space
whereas osmosis diffuses water across a selectively permeable membrane.
Requires energy to move molecules

5. diffusion.
active transport.
passive
transport.
osmosis.
The organelle that is the site of protein synthesis is the
nucleus.
ER.

6. ribosom
e.
mRNA
nucleolu
s.
Unlike animal cells, plant cells have
cell
membranes.
mitochondria.
cell walls.

7. chromosomes.
Diffusion of water through a semipermeable membrane is
diffusion.
active transport.
passive
transport.
osmosis
A great deal of rough ER is observed in a cell. This would lead one to conclude that the
cell is actively involved in

8. DNA
replication.
lipid synthesis.
protein
synthesis.
cell division.
Identify three different functions that membrane proteins provide.
Membrane proteins provide transport for chemical substances to pass through, cell
signaling to relay messages to the inner cell, and intercellular joining wherein they link to
nearby cells.
Which organelle(s) contain DNA?