More Than a Theory
Which endoplasmic reticulum (ER)
is pictured below? Briefly explain.
RER, ribosome bumps
If you wanted to view the nuclear
pores on the nuclear envelope,
would a light or electron
microscope be more appropriate?
Electron microscope
Identify the type of motility
performed by Oxytricha trifallax
as illustrated below.
Cilia
What are the three parts of cell
theory?
1)Each organism is made of
at least one cell
2)Cells are the basic unit of
structure and function
3)Biogenesis (cells come from
preexisting cells)
Antibodies are glycoproteins
produced by white blood cells.
Outline the organelle(s) and final
location the antibody polypeptide
will travel before leaving the cell.
RER, golgi, cell membrane
Identify two organelles that appear
only in animal cells and two
organelles or structures that
appear only in plant cells
Animal: Lysosomes, centrioles,
flagella & cilia
Plant: Chloroplasts, cell wall &
central vacuole
Was the image below of the
amoeba viewed through a light or
electron microscope?
Light microscope
What organelle synthesizes
cytoskeleton in all eukaryotes?
Centrosome
Complete the organelle function
chart below.
Organelle
A)
Central Vacuole
Nucleus
D)
Function
Assembles
polypeptides
B)
C)
Breaks down H2
O2
A) Ribosome B) Store water
C) Store DNA D) Peroxisome
A biologist lyses a cell and
centrifuges its contents. Arrange
the layers of organelles that will
appear in the test tube over time.
Central vacuole, d = 1.03 g/mL
Chloroplast, d = 0.94 g/mL
Ribosome, d = 1.21 g/mL
SER, d = 0.89 g/mL
SER (top), chloroplast, central
vacuole and ribosome
(bottom)
People often mistakenly call viruses
“living things.” What macromolecule
and associated structure, shared by all
cells, are missing from the virus
Phospholipid, cell membrane
Identify the organelles (“cell
mates”) based on their common
function.
1)Adding carbohydrates to
proteins.
2)Detoxification.
1) RER & Golgi 2) SER &
Peroxisome
Dendritic cells are white blood
cells that endocytose bacterial ID
tags and present these ID tags—
stored in a vesicle—to other white
blood cells on membrane proteins
1)Explain the benefit of its shape.
2)What process is needed for the
presentation of the endocytosed
ID tags?
Increased SA = more endocytosis
and presentation opportunities. ID
tag vesicle must be exocytosed.
When viewing plant cells under
the microscope, what pigment was
visible?
Chlorophyll
In addition to the transport of
substances (and organelles) inside
the cell, organization and motility,
what is another, general function
of the cytoskeleton?
Maintain cell shape/structure or
anchor organelles
Muscle cells store glycogen in large
amounts. When active for a long time,
the glycogen is hydrolyzed into
glucose which is processed to make
energy for a protein to contract a
large network of protein tubes. What
three organelles will be particularly
abundant in the muscle cell based
strictly on the description above and
why?
SER (glycogen), mitochondria (ATP
from glucose), cytoskeleton (network)
Leprosy is an disease caused by
Mycobacterium leprae. After
being phagocytosed by host cells,
it lives inside its host. What
organelle’s function did it disrupt,
and what is one reasonable way it
could do so?
Lysosome. Prevent food
vacuole’s fusion or counteract
acids/enzymes
Ligase is an enzyme required for
replicating (copying) DNA. If a
biologist added fluorescent amino
acids to a cell that was currently
building ligase for DNA replication,
which ribosomes would be
expected to fluoresce the most
and why?
Nuclear envelope
ribosomes because the
enzyme is needed in the
nucleus
Describe (with words and/or
pictures) 2 ways to move
substances inside the cell using
the cytoskeleton. Include the
mechanism (“how”) for both.
Cytoskeleton “monorail”
w/motor protein and
cytoplasmic streaming
(breakdown of cytoskeleton for
circulation)