Materials are transported throughout the cell in a series of tubes called thec
centrioles.
mitochondria.
endoplasmic reticulum.
none of the above
[#frame:"CEM2S4C"]
Both mitochondria and chloroplastsb
are found in all cells.
have their own DNA.
have their own nucleus.
have exactly the same internal structures.
[#frame:"CEM2S5A"]
These organelles are able to break down molecules aerobically and make their stored energy available to the cell.b
chloroplasts
mitochondria
endoplasmic reticulum
ribosomes
[#frame:"CEM2S5B"]
The cytoskeleton is a series of protein fibers throughout the cytoplasm thatd
give shape to the cell.
enable the cell to move.
act as a framework for the cell.
all of the above
[#frame:"CEM2S6A"]
Cell movement is possible in some eukaryotes due to projections on the outer surface calleda
cilia and/or flagella.
arms and legs.
hairs.
none of the above
[#frame:"CEM2S6B"]
The plasma membrane consists ofd
phospholipid bilayer.
cholesterol.
proteins.
all of the above
[#frame:"CEM3S1A"]
The phospholipid molecule has a _________ head and a _________ tail.a
polar, nonpolar
nonpolar, polar
protein, lipid
lipid, protein
[#frame:"CEM3S1B"]
The large proteins embedded in the plasma membrane function tod
act as channels to allow particular molecules inside.
act as a recognition marker to identify the cell.
act as a receptor for molecules to attach and transmit a message inside.
all of the above
[#frame:"CEM3S1C"]
The plasma membranea
repels large molecules and charged particles unless these have a particular mechanism to enter the cell.
is a solid barrier to prevent any entry into the cell.
is found outside the cell wall.
allows all substances to enter the cell.
[#frame:"CEM3S2A"]
Diffusionc
is the movement of particles from a low concentration to a higher concentration.
requires energy.
is the movement of particles from a high concentration to a lower concentration.
is an equal distribution of molecules.
[#frame:"CEM3S2B"]
In the human body, diffusion of oxygen into the bloodstream occurs due tob
a lower concentration of oxygen inside the air sacs than in the blood.
a higher concentration of oxygen inside the air sacs than in the blood.
the lack of oxygen in the atmosphere.
all of the above
[#frame:"CEM3S2D"]
Osmosis is thec
diffusion of sugar particles.
diffusion of oxygen only.
diffusion of water.
diffusion of CO2 only.
[#frame:"CEM3S3A"]
If a cell is placed in pure water, it willa
take in water and lyse (a hypertonic situation).
lose water and shrink.
stay the same.
none of the above
[#frame:"CEM3S3C"]
Active transport across the cell membrane is neededd
to maintain a high concentration on one side of the membrane.
for movement against the concentration gradient.
in some instances and requires an input of energy.
all of the above
[#frame:"CEM3S5A"]
Large particles are taken into the cell bya
endocytosis.
exocytosis.
simple diffusion.
none of the above
[#frame:"CEM3S6B"]
Cell walls, large central vacuoles, chloroplasts are all characteristics ofc
animal cells.
bacteria.
plant cells.
all of the above
[#frame:"M2S3B"]
Endergonic reactions ____________ energy whereas exergonic reactions _________ energy.b
release, require
require, release
neither a nor b
fourth answer
[#frame:"CEM4S2A"]
Enzymesd
are proteins.
lower the energy of activation of a reaction.
are specific for their substrates.
all of the above
[#frame:"CEM4S2A"]
Breaking down ATP (exergonic) is coupled to endergonic reactions in the cell. Other exergonic reactions are coupled with the endergonic reactions that build ATP; this assuresa
that the cell has a continual supply of energy.
enzymes are broken down.
the cell has a good supply of oxygen.
none of the above
[#frame:"CEM4S2C"]
We are warm blooded organisms. This constant temperature is maintained byc
the sun.
ADP.
the amount of heat released through coupled reactions.
both a and c
[#frame:"CEM4S2C"]
Each reaction is associated with a particularc
cell.
time period.
enzyme.
all of the above
[#frame:"CEM4S3A"]
In a metabolic reaction, the enzymed
is a breakdown as a product.
remains unchanged to be used in another reaction.
facilitates the reaction.
both b and c
[#frame:"CEM4S3A"]
Metabolic pathways are a series of reactions. What is the usual control of the pathway?d
feedback inhibition
too much end product inhibits the continual production of the pathway
an allosteric site on the original enzyme
all of the above
[#frame:"CEM4S4A"]
Electron transport systemsd
release energy in small packets as they move through the system.
produce large amounts of ATP.
exist in both plant and animal cells.
all of the above
[#frame:"CEM4S4C"]
Photosynthesis takes place in plant chloroplasts because theya
contain pigments that capture the sun's radiant energy.
release energy in small packets.
absorb green lights.
all of the above
[#frame:"CEM5S1C"]
Which wavelengths of light do chlorophyll a and b absorb?c
green, yellow and red
blue, green and yellow
violet, blue and red
none of the above
[#frame:"CEM5S1C"]
In order to take advantage of more light wavelengths, many plant cells useb
magnifying substances.
accessory pigments.
mitochondria.
extra cell pores.
[#frame:"CEM5S1D"]
In photosynthesis, all light energy that is captured is transferred toa
reaction centers.
water molecules.
carotenoids.
all of the above
[#frame:"CEM5S1E"]
Within the chloroplasts are thylakoids whered
light-dependent reactions occur.
water molecules are split.
light is captured.
all of the above
[#frame:"CEM5S2C"]
The process in plants that uses ATP, NADPH, CO2 and H+ to make carbohydrates is calledb
light-dependent reactions.
light-independent reactions.
electron transport.
all of the above
[#frame:"CEM5S4A"]
When protons diffuse out of the thylakoid space across channels formed by ATP synthase,b
ATP is utilized.
ATP is formed.
carbohydrates are formed.
sunlight is captured.
[#frame:"CEM5S3E"]
The Calvin Cycled
occurs in the stroma of the chloroplast.
forms carbohydrates.
is also called light independent reactions.
all of the above
[#frame:"CEM5S4A"]
Carbon fixationa
starts the Calvin Cycle.
releases CO2 molecules.
requires light to occur.
all of the above
[#frame:"CEM5S4B"]
Plants in a hot, dry environment use a modification of the carbon fixing cycle calledc
carbon releasing cycle.
C3.
C4.
carbon modification cycle.
[#frame:"CEM5S5A"]
CAM plants combine CO2 with a 3 carbon compound at night becaused
this is the only time stomata are open.
this is when the stomata are closed.
the environment is too hot for stomata to open in the day.
both a and c
[#frame:"CEM5S5C"]
The starting compound for aerobic respiration isb
carbon.
glucose.
water.
none of the above
[#frame:"CEM6S1A"]
Anaerobic respiration producesa
2 ATP's.
32 ATP's.
38 ATP's.
none of the above
[#frame:"CEM6S6A"]
Glycolysis isd
the first step in cellular respiration.
a process that produces a net total of 2 ATP's.
does not require oxygen.
all of the above
[#frame:"CEM6S1A"]
Each step in glycolysis requires a specific enzyme. How many enzymes are involved?c
ten
sixteen
seven
three
[#frame:"CEM6S2C"]
The end result of glycolysis isc
PGAL.
glucose.
pyruvic acid.
all of the above
[#frame:"CEM6S2C"]
NAD+ is a/and
electron carrier.
transporter of hydrogen atoms and electrons.
recycled during the electron transport chain.
all of the above
[#frame:"CEM6S5A"]
Acetyl-CoA enters the Krebs cycle in the mitochondria and becomes part ofb
pyruvic acid.
citric acid.
electron transport.
water.
[#frame:"CEM6S4B"]
____________ is the final acceptor of H+ at the end of the electron transport chain.c