Practice Exam 2
- When the reactants have more free energy than the products of a reaction, that reaction can be described as
- Exergonice.A & C
- Endergonicf.A & D
- ΔG > 0 g.B & C
- ΔG < 0
- T or F In biological systems all endergonic reactions are directly coupled to exergonic reactions.
a.True
b.False
- When compounds such as NADH and FADH2 are ______, energy is ______
- Reduced, released
- Reduced, absorbed
- Oxidized, released
- Oxidized, absorbed
- Phosphorylated, coupled
- Enzymes are generally ______that function as biological ______.
- Proteins, catalysts
- Proteins, allosteric regulators
- Polynucleotides, energy carriers
- Polynucleotides, allosteric regulators
- T or F Enzymes change the amount of free energy released or absorbed in a reaction.
- True
- False
- NADH is the ______form of NAD+
- Oxidized
- Reduced
- Coupled
- A & B
- If an enzyme requires an inorganic molecule to function, this molecule is known as a
- Cofactor
- Coenzyme
- Competitive Inhibitor
- Non-competitive Inhibitor
- Substrate
- Allosteric regulators of PFK include
- ATP
- ADP
- Glucose
- A & B
- All of the above
9.The net gain of energy per molecule of glucose in glycolysis is
a.2 NADH and 4 ATP
b.2 NADH and 2 ATP
c.1 NADH and 2 ATP
d.There is no net gain of energy
- T or F Of all the energy available to a eukaryotic cell in a glucose molecule, most of this energy is captured through glycolysis.
- True
- False
- How many ATP are generated per pyruvate molecule in citric acid cycle (Kreb’s Cycle)?
- 1
- 2
- 3
- 6
- None, all energy gain is in the form of e- carriers
- Substrate-level phosphorylation generates ______in ______
- NADH and ATP; Glycolysis and Krebs Cycle
- NADH and ATP; Krebs Cycle
- ATP; Glycolysis, Krebs Cycle, and the Electron Transport Chain
- ATP; Glycolysis and Krebs Cycle
- When chlorophyll absorbs a photon of light, what initially happens to the energy of the absorbed photon?
- It is transferred to CO2
- It is transferred to water
- It is used to make ATP
- It is transferred to an electron
- It is transferred to NADPH
- Cyclic electron flow in the chloroplast produces
- Glucose
- NADPH
- ATP
- A & B
- A, B & C
- In plants, which enzyme is responsible for utilizing the energy of a proton electrochemical gradient in the production of ATP?
- ATP synthase
- H+ ATPase
- NADPH
- Plastoquinone
- Ferredoxin
- ______produces equal amounts of ATP and NADPH
- Kreb’s Cycle
- Electron transport chain
- Cyclic electron flow
- Non-cyclic electron flow
- C & D
- When RuBP carboxylase (rubisco) adds O2 instead of CO2 to RuBP
- Photorespiration occurs
- CO2 partial pressure is low
- A C3 plant is likely experiencing abundant moisture (wet conditions)
- A & B
- All of the above