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#biology1090 #cellstructure #cellfunction
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1
What is the light source of fluorescence microscopy?
your glowing personality
sunlight
electrons
laser
2
If the amount of unsaturated lipids increases, how does that affect the transition temperature?
raises temperature
decreases temperature
nothing
this doesn't apply to membranes
3
Which of the following describes a peripheral membrane protein?
associated with the surface of the lipid bilayer
spans the lipid bilayer
attached to a lipid in the bilayer
none of the above
4
Which of the following describes the movement of lipids laterally in the leaflet?
easily
with difficulty
slowly
it doesn't
5
In the endocytic pathway, what direction does uptake/recycling work towards?
Inward
Outward
6
Which of the following is a component of cell theory?
the cell is controlled by a genetic program
a cell can spontaneously arise
the cell is a structural unit of life
all organisms are composed of one cell
7
Unsaturated lipids will increase fluidity.
True
False
8
Who is credited with introducing the word 'cell' into biology?
Robert De Niro
Robert Hooke
Robert Herjavec
Robert Boyle
9
If a membrane is cooled, what state is it considered to be in?
liquid crystal
solid crystal
solid crystalline gel
liquid crystalline gel
10
Which of the following describes the
regulated
biosynthetic pathway?
continuously discharges materials into extracellular space
materials are transported in secretory vesicles
materials are stored in membrane-bound packages
uptake/recycling
11
Which of the following is a function of biological membranes that includes energy transduction?
controls movement of materials into and out of the cell
cell boundary
enables interaction between cells
provides a scaffold for biological activities
12
Which of the following is a part of the endo-membrane system?
ribosomes
mitochondria
nucleus
endoplasmic reticulum
13
What is a lipid bilayer composed of?
phosphate and amino acid
phosphate and fatty acid
phosphorus and fatty acid
phosphorus and amino acid
14
What is another name for a biological membrane?
protein bilayer
amino bilayer
lipid bilayer
carb bilayer
15
What are the two main secretory pathways used in endomembrane systems?
non-constitutive & regulated
constitutive & non-constitutive
regulated & unregulated
constitutive & regulated
16
Which of the following is a function of the endoplasmic reticulum?
protein synthesis
carbohydrate metabolism
steroid hormone synthesis
detoxification
17
What distinguishes a prokaryotic cell from an eukaryotic cell?
the style of cell division
the place the cell is normally found
the presence of a cell wall
the way DNA is packaged
18
In autoradiography, what is the short incubation with a radioactive isotope called?
pulse
chase
polygon
granule
19
Which method of moving molecules across a membrane involves small charged molecule?
facilitated diffusion
simple diffusion
diffusion through a channel
active transport
20
What enzyme is involved in the movement of lipids from one leaflet to another?
flippase
amylase
protease
lipase
21
Which of the following describes cell homogenization?
uses radioactive isotopes to observe the cell
breaking up cells
building cells
uses GFPs to observe the cell
22
Which of the following is a component of cell theory?
cells are capable of self-regulation
cells engage in mechanical activity
cells evolve
a cell can only arise from a pre-existing cell
23
The surface area of the cytoplasmic membrane is greater than the area in the plasma membrane.
False
True
24
What is an organelle?
a specialized function-less compartment in a cell
a specialized membrane bound compartment in a cell
another name for a cell
a specialized component in a cell
25
Lipids rafts are also referred to as __________.
micro-ranges
micro-domains
macro-ranges
macro-ranges
26
Plants have golgi bodies where as animal cells don't.
True
False
27
Glycolipids and glycoproteins only exist on the inner leaflet of the membrance
True
False
28
What is a mechanism of moving molecules across membranes that requires energy?
facilitated diffusion
diffusion through a channel
active transport
simple diffusion
29
What are the three types of gated channels?
ion, integrated & mechano - gated channels
glucose, ligand & mechano - gated channels
simple, facilitated & active - gated channels
voltage, ligand & mechano - gated channels
30
Which of the following is an example of a prokaryotic cell?
neuron
bacteria
muscle cell
liver cell
31
Which mechanism for moving molecules across membranes is for small uncharged molecules?
diffusion through a channel
active transport
facilitated diffusion
simple diffusion
32
Which of the following is one of the three points of cell theory?
cell respond to stimuli
all organisms are composed of 1 or more cell types
cells can assimilate and utilize energy
the dna is the structural unit of life
33
What is the usual size range for a cell?
10^-2 - 10^-5 m
10^-1 - 10^-2 m
10^-3 - 10^-6 m
10^-7 - 10^-9 m
34
What mechanism of moving molecules across the membrane involves an integral membrane protein?
active transport
simple diffusion
diffusion through a channel
facilitated diffusion
35
Saturated lipids will decrease fluidity.
True
False
36
Which of the following is a component that only exists in plant cells?
ribosomes
microtubule
cell membrane
chloroplast
37
Warming a membrane increases fluidity. What state is this lipid bilayer considered to be in?
solid crystal
liquid crystalline gel
solid crystalline gel
liquid crystal
38
Which of the following is a function of the smooth endoplasmic reticulum?
protein folding
synthesis of integral membrane proteins
synthesis of membranes
sequestration of Ca2+ in muscle cells
39
Which of the following could be used to describe a small wavelength of visible light?
low energy & red
low energy & purple
high energy & red
high energy & purple
40
Which of the following is a basic characteristic of a cell?
creating energy
complexity
death
simplicity
41
What is the name for something that keeps content from mixing together?
component
organelle
compartment
sequester
42
In autoradiography, what is the method that used non-radioactive isotopes?
granule
pulse
wave
chase
43
How is a liquid crystal affected by the addition of a cholesterol?
decreased fuidity
nothing
increases fuidity
allows for protein binding
44
Which of the following describes an integral membrane protein?
spans the lipid bilayer
associated with the surface of the lipid bilayer
an influencer of lipid bilayer fluidity
attached to a lipid in the bilayer
45
Having both hydrophobic (non-polar) & hydrophilic (polar) regions is referred to as?
asymmetry
mosaic
compartmentalization
amphipathic
46
The phospholipid bilayer is dynamic and embedded molecules are constantly moving.
True
False
47
Which of the following describes a lipid-anchored membrane protein?
spans the lipid bilayer
attached to a lipid in the bilayer
decreases fluidity
associated with the surface of the lipid bilayer
48
Some proteins do not move?
False
True
49
Which of the following could be used to describe a long wavelength of visible light?
low energy & purple
high energy & red
low energy & red
high energy & purple
50
Which of the following is a function of only the plasma membrane
all of the above
cell boundary
allow response to external stimuli
define/enclose compartments
51
What is the wavelength range of visible light?
~300-800nm
~400-700nm
~400-800nm
~500-700nm
52
Which of the following could be used to describe a cell membrane?
symmetrical
stationary
composed of two leaflets
rigid
53
Which of the following is not a function of ALL biological membranes?
cell boundary
none of the above
provide a scaffold for biochemical activities
define/enclose compartments
54
Which method of moving molecules moves the molecules against the concentration gradient?
facilitated diffusion
active transport
simple diffusion
diffusion through a channel
55
Movement to one side of the leaflet from another is difficult.
False
True
56
Free cell systems do not contain whole cells.
True
False
57
What theory describes eukaryotic cell origin?
fusion theory
endoreticulum theory
transport theory
endosymbiont theory
58
What is the approximate width of a membrane?
4nm
2nm
10nm
6nm
59
How is a crystalline gel membrane affected by the addition of a cholesterol?
nothing
stabilizes
increases fuidity
decreases fuidity
