WorksheetsChapter 8 Bio1201
Total questions: 52
Worksheet time: 2hrs 50mins
What does this diagram represent?
Membrane enzymes
Metabolic Pathway
Enzymes
Endergonic Reaction
True or False :
Each step of a metabolic pathway is catalyzed by the same enzyme
True
False
Cells require a (a) input of energy
The two types of metabolic reactions are
expressive
exergonic
releasing
entaking
endergonic
Exergonic reaction
A reaction that requires energy from the surroundings to occur
A reaction that releases energy when it takes place
Ex: : ATP cleavage to ADP and Pi
Ex: DNA synthesis
What is an important exergonic reaction Dr. Moroney wants you to know?
(a)
What type of reaction is the formation of ADP from ATP?
dehydration
hydrolysis
A reaction where an unfavorable reaction is linked to a very favorable reaction
grouped
linked
coupled
pair
In which direction do coupled reactions go?
Exergonic to Endergonic
Exothermic to Endothermic
Endergonic to Exergonic
Endothermic to Exothermic
What two reactions are coupled reactions?
ATP -> ADP + Pi
Glucose + O2 -> CO2 and water
Glutamate + NH3 -> Glutamine
sucrose + H2O -> glucose + frutose
There are three points about enzymes, name one:
Enzymes (are) (a)
What type of reaction is this
(a)
What type of reaction is this?
(a)
What do enzymes do to a reaction?
increases speed
gains energy
lower activation energy
increases deltaG
True or False:
products -> Substrates
True
False
What is one factor that affects activation enzyme activity?
(a)
What is another factor that affects activation enzyme activity?
(a)
What is the third factor that affects activation enzyme activity?
(a)
What does this picture represent?
enzyme transport
crabs cycle of an enzyme
endergonic reaction of an enzyme
catalytic cycle of an enzyme
What are they types of enzyme inhibition?
active
competitive
noncompetitive
passive
The active site of an enzyme is blocked
competitive inhibition
noncompetitive inhibition
An inhibitor binds away from active site changing protein shape
noncompetitive inhibition
competitive inhibition
Select which statements are true
Most metabolic pathways are regulated
Enzyme activity is controlled
Regulated enzymes possess active and inactive forms
Regulation is not reversible
Allosteric Regulation
Regulatory molecule binds away from the active site
Regulatory molecule binds in the active site
Regular molecule binds away from the active site and is only an inhibitor
Regulatory molecule may be an activator or inhibitor
Feedback Inhibition sometimes controls pathways, Often regulated by _____ allosteric regulation
regulatory enzyme
end product
start product
intermediate
Where is the Krebs cycle located?
cytoplasm
mitochondria
intermolecular space
mitochondrial matrix
Where does the Electron Transport Chain occur?
outer mitochondrial membrane
cytoplasm
inner mitochondrial membrane
mitochondria
Breakdown sugars, release energy; Energy is used to form ATP; and Sugars formed by photosynthesis describe what
The Krebs cycle
Cellular Respiration
Electron Transport Chain
Aerobic respiration only
What are the THREE main parts of cellular respiration?
(a)
How many carbons does glucose have?
5
4
6
3
How many CO2 molecules will one glucose molecule produce?
1 CO2
4 CO2
8 CO2
6 CO2
What does this reaction represent?
Glucose + O2 -> CO2 + H2O
(a)
What two high energy molecules does Aerobic respiration produce?
NADH and ATP
NADH and ADP
NAH+ and ATP
ADP and NAD+
In Aerobic Respiration, what happens to NAD+
donates an electron to O2 forming H2O
accepts electrons from O2 forming H2O
picks up electrons from glucose during glycolysis and the Krebs cycle forming NADH
picks up a proton from the mitochondrial matrix forming NADH
After NADH forms, what happens
NAD+ picks up electrons from glucose during glycolysis and the Krebs cycle forming NADH
Produces the high energy molecules
accepts electrons from the CO2 which forms NAD+
donates electrons to O2 via the electron transport chain forming H2O
What two things are consumed during aerobic respiration?
(a)
How much energy is released from ADP and Phosphate in Aerobic respiration?
20 ATP
6 ATP
1 ATP
36 ATP
What type of reaction does the picture represent?
(a)
Reduction reaction
gains electrons
loses electrons
Oxidation reaction
gains electrons
loses electrons
Where does Glycolysis occur?
mitochondrial matrix
cytoplasm
inner membrane
outer membrane
Where does Glycolysis occur?
mitochondrial matrix
cytoplasm
inner membrane
outer membrane
Where does the Krebs cycle occur?
mitochondrial matrix
cytoplasm
inner membrane
outer membrane
Where does Electron Transport occur?
mitochondrial matrix
cytoplasm
inner membrane
outer membrane
Oxidation-reduction reactions transfer protons from the _____ to the _______ space
inter membrane space ; matrix
outer membrane space ; mitochondrial matrix
cytoplasm ; inner membrane
matrix ; inner membrane
For the Krebs cycle (2 pyruvates)
Total
ATP = 2
NADH = 8
FADH2 = 2
Total
ADP = 2
NAD+ = 8
FADH = 2
Total
ATP = 0
NADH = 2
FADH2 = 0
Total
ADP = 8
NADH = 2
FADH2 = 8
The Electron Transport produces an (a) gradient
For the Glycolysis
Total
ATP = 6
Total
ADP = 2
Total
ATP = 0
Total
ADP = 8
For the Krebs Cycle
Total
ATP = 36
Total
ADP = 20
Total
ATP = 30
Total
ADP = 38
Fermentation occurs when
there is too much oxygen
there is not enough oxygen
there is no oxygen
there is the perfect amount of oxygen
What two things can Pyruvate be converted into during Fermentation?
(a)
What is the net ATP per molecule of glucose for fermentation?
2
4
6
8
