1. NADH is produced
- O2 is produced
- ATP is produced.
- ATP is used.
- O2 is used.
2 One function of both alcohol fermentation and lactic acid fermentation is to ______
- reduce NAD+ to NADH.
- reduce FAD+ to FADH2.
- oxidize NADH to NAD+.
- reduce FADH2 to FAD+.
- do none of the above.
3 Where does glycolysis take place in eukaryotic cells?
- mitochondrial matrix
- mitochondrial outer membrane
- mitochondrial inner membrane
- mitochondrial intermembrane space
- cytosol
4 -Which kind of metabolic poison would most directly interfere with glycolysis?
- an agent that reacts with oxygen and depletes its concentration in the cell
- an agent that binds to pyruvate and inactivates it
- an agent that closely mimics the structure of glucose but is not metabolized
- an agent that reacts with NADH and oxidizes it to NAD+
- an agent that blocks the passage of electrons along the electron transport chain
5 -In addition to ATP, what are the end products of glycolysis?
- CO2 and H2O
- CO2 and pyruvate
- NADH and pyruvate
- CO2 and NADH
- H2O, FADH2, and citrate
6. Before a glucose molecule can be broken down to release energy,
- two ATP molecules must be taken away from glucose.
- one ATP molecule must be added to glucose.
- one ATP molecule must be taken away from glucose.
- two phosphate groups must be attached to glucose.
- three ATP molecules must be added to glucose.
7-During aerobic respiration, electrons travel downhill in which sequence?
- food → citric acid cycle → ATP → NAD+
- food → NADH → electron transport chain → oxygen
- glucose → pyruvate → ATP → oxygen
- glucose → ATP → electron transport chain → NADH
- food → glycolysis → citric acid cycle → NADH → ATP
8-Where does the Calvin cycle take place?
- stroma of the chloroplast
- thylakoid membrane
- cytoplasm surrounding the chloroplast
- interior of the thylakoid (thylakoid space)
- outer membrane of the chloroplast
9-CO2 + H2O + light energy --> [CH2O] + O2, in the given chemical process above, what does CH2O represent?
- Chlorophyll
- Carbohydrate
- Carbonated water
- Carbonic acid
- Carbon hydroxide
10-The reactions that produce molecular oxygen (O2) take place in
- the light reactions alone.
- the Calvin cycle alone.
- both the light reactions and the Calvin cycle.
- neither the light reactions nor the Calvin cycle.
- the chloroplast, but are not part of photosynthesis
11-Plant cells produce one molecule of O2
- by splitting two molecules of water.
- by splitting ribulose bisphosphate.
- by breaking down glucose.
- by splitting carbon dioxide.
- during respiration.
12-In photosynthetic cells, synthesis of ATP by the chemiosmotic mechanism occurs during _________
- photosynthesis only.
- respiration only.
- both photosynthesis and respiration.
- neither photosynthesis nor respiration.
- photorespiration only.
13-Energy that is not converted to useful energy is usually given off as...
- radioactivity
- electricity
- light
- heat
- entropy
14-A "high-energy bond"
- absorbs a large amount of free energy when the phosphate group is attached during hydrolysis.
- is formed when ATP is hydrolyzed to ADP and one phosphate group.
- is usually found in each glucose molecule; that is why glucose is chosen as the starting point for glycolysis.
- releases a large amount of usable energy when the phosphate group is split off during hydrolysis.
- none of these
15 -ATP is
- synthesized within mitochondria.
- all of these.
- the cell's principle compound for energy transfers.
- the molecule all living cell rely on to do work.
- a short-term, energy-storage compound.
16-The main source of energy in the human diet is
- fats.
- proteins.
- steroids.
- carbohydrates.
- nucleotides.
17-Where are the proteins of the electron transport chain located?
- cytosol
- mitochondrial outer membrane
- mitochondrial inner membrane
- mitochondrial intermembrane space
- mitochondrial matrix
18-According to the first law of thermodynamics, the total amount of energy in the universe __________
- is always decreasing
- is always increasing
- varies up and down
- is constant
- cannot be determined
19-The figure below compares the paths of two reactions (reaction A and reaction B). Based on your knowledge of enzymes and enzymatic reactions, use the figure below to select the correct statement.
- The curve for reaction A shows a reaction that is enzyme catalyzed. This is evident because the reaction time is slower.
- The curve for reaction B shows a reaction that is enzyme catalyzed. This is evident because the activation energy is lower.
- The curve for reaction A shows an reaction that is enzyme catalyzed. This is evident because the reaction activation energy is higher.
- Both 1 and 3 are correct.
- None of the above is correct.
20 When the enzyme catalase breaks down hydrogen peroxide which gas is released?
- Hydrogen
- Water
- Oxygen
- Carbon dioxide