Bio Exam Flashcards
The immediate energy source that drives atp synthesis by atp synthase during oxidative phosphorylation is the
H+ concentration across the membrane holding ATP synthase
Which metabolic pathway is common to both fermentation and cellular respiration of a glucose molecule?
Glycolysis
In the mitochondria exergonic redox reactions do what
Provide the energy that establishes the proton gradient
The final electron acceptor of the electron transport chain that functions in aerobic oxidative phosphorylation is
Oxygen
What is the oxidizing agent in the following reaction
Pyruvate
When electrons flow along the electrons transport chains of a mitochondria what changes occur
The ph of the matrix increases
Most c02(carbon) from catabolism is released during
The citric acid cycle
In photosynthesis plants use carbon from what to make sugar and other organic molecules
Carbon dioxide
Which of the following groups of organism contain only heterotrophs
Fungi
How does carbon dioxide get into the leaf
Through the stomata
In a rose bush chlorophyll is located where
Thylakoids which are in chloroplasts in the mesophyll cells of the leaf
Chlorophyll molecules are in what part of the chloroplast
Thylakoid membrane
The source of oxygen produced by photosynthesis has been identified through experiments using radioactive tracers. The oxygen comes from what
Water
In photosynthesis, what is the fate of the oxygen atoms present in co2?
In sugar molecules and in water
Molecular oxygen is produced during
Linear electron flow during the light reactions
The reactions of the Calvin cycle are not directly dependent on light, but they usually do not occur at night. Why?
The Calvin cycle requires products only produced when the photo systems are illuminated
The Calvin cycle occurs in the
Stroma
What is the role of NADP in photosynthesis?
It forms nadph to be used in the Calvin cycle
A photon of which of these colors would carry the most energy
Blue
If an enzyme is added to a solution where it’s substrate and product are in equilibrium what will occur ?
Nothing the reaction would stay at equilibrium
Bacteria that are metabolically active in hot springs because
Their enzymes have high optimal temperatures
If an enzyme in solution is saturated with substrate, the most effective way to obtain a faster yield of products is to
Add more of the enzyme
Which of the following metabolic processes can occur without a net influx of energy from some other process
C6H12O6 + 6O2 > 6CO2 + H2O
Most cells cannot harness heat to perform work because
Temperature is usually uniform throughout a cell
Catabolism is to anabolism as _ is to _
Exergonic; endergonic
