-
Select the compound that contains the most energy:
ATP
-
Select the phosphorylation reaction:
glucose + ATP ? glucose-P + ADP
-
The transfer of electrons from one compound to another is equivalent to _______________ transfer.
energy
-
____________ is a process where energy (as electrons) is released,whereas ____________ is a process where energy (as electrons) is accepted.
Oxidation; reduction
-
Because enzymes affect the speed of chemical reactions without being consumed, they are referred to as:
catalysts.
-
Parts of the enzyme molecule that interact with a substrate are called:
active sites.
-
The substance on which an enzyme acts is called the:
substrate.
-
Which of the following does not represent a method by which cells regulate enzyme activity?
heat denaturation of the enzyme
-
If one continues to increase the temperature in an enzyme-catalyzed reaction, the rate of the reaction:
increases and then decreases rapidly.
-
An allosteric enzyme:
- allows a substance other than the substrate to bind to the enzyme, thereby
- activating or inactivating it.
-
The splitting of molecules into smaller components is referred to as:
catabolism.
-
Cellular respiration is most accurately described as a(n) ______________ process.
catabolic
-
The overall reaction for the aerobic respiration of glucose is summarized as:
C6H12O6 + 6 O2 + 6 H2O ? 6 CO2 + 12 H2O + Energy.
-
In aerobic respiration, glucose is completely:
oxidized to carbon dioxide.
-
In aerobic respiration, the electrons associated with the hydrogen
- atoms in glucose are transferred to:
- oxygen in a series of steps.
-
If conditions are aerobic, pyruvate flows directly into the _______ where some of its atoms are converted next to _______.
mitochondia; acetyl coenzyme A
-
Which process matches the products?
electron transport and chemiosmosis�ATP, H2O, NAD+, FAD
-
Which process matches the products?
citric acid cycle�CO2, NADH, FADH2, ATP
-
Which process matches the products?
formation of acetyl CoA�Acetyl CoA, CO2, NADH
-
Which process matches the products?
glycolysis�pyruvate, ATP, NADH
-
In eukaryotes, glycolysis occurs in the:
- cytosol.
- E. mitochondrial matrix.
-
During chemiosmosis, ____________ are transferred from NADH and FADH2 to electron acceptor molecules, and the energy released is used to create a(n) ____________ gradient across the inner mitochondrial membrane.
ADP molecules; ATP molecule
-
NADH is formed when NAD+ accepts:
a proton and a pair of electrons.
-
Glycolysis yields a net energy profit of _______ ATP molecules per
-
During the citric acid cycle, each acetyl group entering the cycle yields:
1 ATP, 3 NADH, and 1 FADH2.
-
A glucose molecule that is metabolized via aerobic respiration has been
- completely broken down and released as CO2 by the end of:
- the citric acid cycle.
-
The role of the oxygen molecules required for aerobic respiration is:
to accept the low energy electrons at the end of the electron transport chain.
-
In chemiosmosis, ATP is produced as hydrogen ions (protons) passthrough:
ATP synthase.
-
Anaerobic respiration differs from aerobic respiration in that anaerobic respiration:
can utilize NO3- as the terminal electron acceptor.
-
The production of alcohol or lactate from pyruvate during ____________occurs as a means of regenerating ____________ from ____________.
fermentation; NADH; NAD+
-
The process by which light energy is converted into the stored chemical energy of organic molecules is:
photosynthesis.
-
Light behaves not only as waves, but also as particles, which are referred to as:
photons.
-
An electron absorbs a photon of light energy and becomes energized;the electron shifts from a ____________ atomic orbital to a _____________ atomic orbital.
low energy; high energy
-
Electrons that are excited to a higher energy level may be transferred to an electron acceptor or may return to a ground state. If the latter occurs, energy will be released in a process known as:
fluorescence.
-
Chlorophyll and accessory photosynthetic pigments are associated with the:
light reaction centers of the stroma lamellae.
-
By definition, substances that absorb visible light are called:
pigments.
-
The most important photosynthetic pigment(s) is(are):
chlorophyll a.
-
A group of thylakoid discs make up:
a granum.
-
In a chloroplast, there is an outer and an inner membrane. The inner membrane encloses a fluid filled region called the:
stroma.
-
The thylakoid membrane encloses a space called the:
lumen.
-
Thylakoid membranes are involved in _____ synthesis.
ATP
-
Red and blue light support the highest rates of photosynthesis because:
chlorophyll absorbs these wavelengths more than other wavelengths.
-
The overall reactions of photosynthesis are best summarized as:
6 CO2 + 12 H2O ? C6H12O6 + 6 O2 + 6 H2O.
-
The reactions of photosynthesis are divided into two categories:
light-dependent reactions and carbon fixation reactions.
-
In photosynthesis, ATP and NADPH are produced during: the carbon fixation reactions.
the carbon fixation reactions
-
The electron transport chain of photosynthesis is located in the:
thylakoid membrane.
-
Oxygen produced by photosynthesis comes directly from:
H2O.
-
ATP is formed when __________________ the thylakoid lumen.
hydrogen ions leave
-
In C4 plants, reactions that fix CO2 into four-carbon compounds occur in:
- mesophyll cells.
- xylem cells.
-
At night, CAM plants incorporate CO2 into ____________, which is stored in the ____________ of their cells.
malate; vacuoles
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