The process occurring within living cells which releases chemical energy stored in food as shown in the following reaction is called: Glucose -> CO2 + H2O + Energy
Glycolysis
Enzymatic Breakdown
Cellular Respiration
Photosynthesis
The majority of the energy released in the breakdown of glucose is trapped by an energy transfer compound known as:
NADP
NAD
ATP
NADPH2
The energy transfer compound described in the preceding problem which traps the majority of the energy released in the breakdown of glucose:
is different for protists than for animals
is the same compound for the majority of all living organisms
is the same compound for all living organisms
is different for plants than for animals
Once formed, the energy transfer compound referred to in the preceding problem releases its stored energy needed for the maintenance of various activities within the cell by:
donating a high energy electron
donating a pair of hydrogen ions
losing hydrogen atoms to a cytochrome system
losing its terminal phosphate group
The first major set of reactions occurring in the breakdown of glucose involves the stripping away of hydrogen atoms resulting in the production of two 3-carbon molecules of pyruvic acid. This process is called:
Fermentation
Oxidation
Enzymatic breakdown
Under the right conditions, the hydrogen atoms which are stripped away during the process described in the preceding problem are picked up by a carrier molecule known as:
ADP
NADH2
The carrier molecules referred to in the preceding problem transfer the hydrogen ions and their high-energy electrons to a system which moves the electrons down an energy gradient. This system is called the:
Hydrogen transport system
Cytochrome transport system
Electron transport chain
respiratory chain
all of the above
After the electrons have passed through the system described in the preceding problem, the hydrogen ions and their electrons are picked up by another hydrogen acceptor which is:
O2
The compound formed from the union of the hydrogen ions, electrons, and the hydrogen acceptor molecule described in the preceding problem is:
H2O
H2O2
The entire sequence of reactions described from problems 5 to 9 will occur:
only in the presence of oxygen
only in the presence of light
Whether or not oxygen is present
whether or not light is present
When no oxygen is present, the breakdown of glucose into two molecules of pyruvic acid results in the net production of ______ molecules of ATP.
6
8
4
2
When no oxygen is present, the conditions are said to be:
non-oxidative
aerobic
anaerobic
antiaerobic
Under the conditions described in the preceding problem, the pyruvic acid formed from the breakdown of glucose can be further broken down under an overall process known as:
cellular respiration
the Kreb's cycle
fermentation
glycolysis
The ultimate hydrogen acceptor molecule in the process described in the preceding problem is:
pyruvic acid
acetic acid
In yeast cells the final end product(s) of the process described in problem 13 is/are:
Water and carbon dioxide
Ethyl Alcohol
Ethyl alcohol and carbon dioxide
lactic acid and carbon dioxide
In animal cells, the final end product(s) of the process described in problem 13 is/are
ethyl alcohol and carbon dioxide
lactic acid
water and carbon dioxide
If the conditions are aerobic the overall breakdown of glucose continues, as pyruvic acid is further broken down in a second major set of reactions called:
oxidative photophosphorylation
substrate-level phosphorylation
cyclic photphosphorylation
Before actually entering the process described in the preceding problem, each molecule of pyruvic acid is first broken down to form:
Acetyl - CoA and acetic acid
Coenzyme A and acetic acid
Acetyl - CoA and carbon dioxide
Coenzyme A and carbon dioxide
Which lab did you like best and why?
Sourdough bread
Root Beer lab
Enzyme potato lab
Jello lab
Acetyl - CoA formed in the breakdown of pyruvic acid transfers a 2-carbon acetyl group to a molecule of:
-ketoglutaric acid
citric acid
oxaloacetic acid
The molecule thus formed from the reaction described in the preceding problem is known as
- ketoglutaric acid
For each molecule of glucose, _________ molecules of carbon dioxide are given off in the breakdown of citric acid to oxaloacetic acid.
In the entire sequence of reactions leading to the complete breakdown of glucose, a total of __________ molecules of ATP are formed when all processes are considered!
32
38
36
34
Dried yeast is introduced into a vacuum bottle containing a 25% molasses solution. After a period of time, a gas begins to be given off. The gas which is given off is most likely:
CO3
CO2
During the first three steps of glycolysis, ________ molecules must be invested per glucose molecule in order to overcome certain endergonic steps.
2 ATP
2 NADH
4 ATP
4 NADH
6 ATP
For each molecule of glucose processed by glycolysis, there is a net energy yield of:
2 ATP and 2 NADH
2 ATP and 4 NADH
4 ATP and 2 NADH
4 ATP and 4 NADH
The complete breakdown of pyruvic acid in the presence of oxygen is an:
anaerobic process that releases a large amount of energy
aerobic process that produces lactic acid or ethanol
anaerobic process that releases little usable energy
aerobic process that releases a large amount of energy
anaerobic process that produces lactic acid and ethanol
An oxygen debt may be accumulated in muscle cells by __________ during short bursts of intense muscular activity.
the carboxylation of pyruvic acid
glycolysis as pyruvic acid is produced under anaerobic conditions
the production of lactic acid under anaerobic conditions
electron transport as NADH is reoxidized to NAD+
the Kreb's cycle as acetyl CoA is completely oxidized
LActic Acid is converted to pyruvic acid in the:
liver
muscles
brain
spleen
stomach
In eukaryotes, the enzymes involved in the Kreb's cycle and electron transport are located in the:
cell membrane
cytoplasm
mitochondria
peroxisomes
lysosomes
Respiration is a 2-stage process that occurs in the _____________ and consists of ____________.
mitochondria; glycolysis and electron transport
cytoplasm; the Krebs cycle and electron transport
cytoplasm; the Krebs cycle and glycolysis
mitochondria; the Krebs cycle and electron transport
The folds of the inner membrane of mitochondria are called:
matrix
cisternae
grana
thylakoids
cristae
In eukaryotic cells, some of the enzymes associated with the Krebs cycle are located in the __________ and others are located in the __________.
matrix; cell membrane
peroxisomes; Golgi complexes
cytoplasm; inner membrane
thylakoids; grana
cristae; matrix
The enzymes of the electron transport system are located in the mitochondrial:
outer membrane
intermembrane space
The dense solution within the inner compartment of the mitochondria that contains enzymes, coenzymes, water and phosphates is called the:
stroma
The Krebs cycle begins when the acetyl group of acetyl CoA is joined to _________.
carbon dioxide
malic acid
succinic acid
THe final oxidation of the carbons from the original glucose molecule is completed in:
the Krebs cycle
the electron transport chain
pyruvic acid oxidation
alcoholic fermentation
The Krebs cycle is called a cycle because:
the enzymes involved are located around the edge of the mitochondrion.
it begins and ends with oxaloacetic acid
cyclic AMP is produced
the process involves cyclic phosphorylation
the product of one reaction is the substrate of the next reaction.
The organelle that is a major producer of ATP and is found in both heterotrophs and autotrophs is the
chloroplast
nucleus
ribosome
Golgi apparatus
mitchondrion
Lactic acid metabolism is important for what reason?
It makes 2 ATP
It releases 4 ATP from NADPH2
It provides a burst of energy to move when oxygen has run out
B and C
None of the above