WorksheetsMetabolism and Cellular Respiration
Total questions: 20
Worksheet time: 19mins
This pathway releases stored energy by breaking down complex molecules
Anabolic Pathways
Catabolic Pathways
Fermentation
Thermodynamic pathways
Which is correct regarding cellular respiration?
Glucose is oxidized, oxygen is reduced
Glucose is reduced, oxygen is oxidized
When NAD+ gains a hydrogen atom, it becomes
oxidized
redoxed
reduced
hydrolyzed
Which step would happen normally whether oxygen is present or not?
ETC
Glycolysis
Kreb Cycle
Oxidative Phosphorylation
Why are carbs and fats a good source of energy in food?
They have lots of oxygen
They have long carbon skeletons
They do not contain nitrogen
They have lots of electrons associated with hydrogen
After glucose splits into two molecules of pyruvate through glycolysis, most of the potential energy left from glucose is where?
transferred to ADP making ATP
Stored in NADH
Retained in the two pyruvates
lost as heat
The energy containing products of glycolysis are
2 NAD+, 2 Pyruvates, and 2 ATP
2 NADH. 2 Pyruvates, and 2 ATP
6 CO2, 2 Pyruvates, and 2 ATP
6 CO2, 2 Pyruvates, and 36 ATP
Carbon Dioxide is released during which stages of cellular respiration?
Glycolysis and Pyruvate Oxidation
Pyruvate Oxidation and Citric Acid Cycle
Citric Acid Cycle and Oxidative Phosphorylation
Citric Acid Cycle only
Which is the correct sequence in which electrons travel during aerobic respiration
Glucose → Citric Acid Cycle → ATP → NAD+
Glucose → NADH → ETC → Oxygen
Glucose → Pyruvate → ATP → Oxygen
Glucose → Citric Acid Cycle → NADH → ATP
In cellular respiration, the energy for most ATP synthesis is supplied by
Converting pyruvate from glucose
Transferring electrons from organic molecules
Generating carbon dioxide in the Krebs cycle
A concentration gradient across a membrane
What primary role does oxygen play in cellular respiration?
combines with carbon to form CO2
catalyze the reactions of glycolysis
acts as an acceptor for electrons and hydrogen, forming water
acts as a co-enzyme holding on to electrons
Which step produces the most ATP if glucose is completely broken down into carbon dioxide and water?
Glycolysis
Pyruvate Oxidation
Citric Acid Cycle
Electron Transport Chain
Oxidative Phosphorylation (Chemiosmosis)
Which step(s) produce NO ATP?
Glycolysis and Citric Acid Cycle
Electron Transport Chain
Oxidative Phosphorylation
Electron Transport Chain and Pyruvate Oxidation
Which is true regarding anabolic pathways?
they consume energy to build up polymers from monomers
they do not depend on enzymes
they release energy breaking polymers into monomers
they are spontaneous chemical reactions
Which is true regarding an organism's metabolism?
metabolism is the sum of all exergonic reactions in an orgamism
metabolism consists of all of the chemical reactions in an organism
metabolism depends on a constant supply of energy from food
metabolism always increases the entropy in an organism
what happens to the heat that is lost from an organism's chemical reactions?
It's used to power more cellular work
it's used to store energy as more ATP
it's lost to the enviornment
it's transported to other organs
Which is true regarding enzymes?
They increase the rate of a reaction by making the reaction more exergonic
They increase the rate of a reaction by lowering the activation energy barrier
They increase the rate of a reaction by reducing the rate of reverse reactions
They change the point at which a reaction reaches equilibrium
How does a noncompetitive inhibitor affect an enzyme's activity?
by binding at the active site
by acting as a coenzyme for the reaction
by decreasing the activation energy
by changing the shape of the active site
Which of the following represents the activation energy required for the enzyme-catalyzed reaction?
A
B
C
Neither
Which would be the same in either an enzyme-catalyzed or a noncatalyzed reaction?
A
B
C
Neither
