Metabolism & Photosynthesis Exam Flashcards
Describe Catabolic Pathways
They release energy as they degrade polymers from monomers
Why is ATP an important molecule in metabolism?
It provides energy coupling between exergonic and endergonic reactions
Which curve represents the behavior of an enzyme taken from bacterium at temps of hot springs at 70% celcius?
Look at the X axis for temp that is at 70 degrees not pH etc.
Which curve would show where taken from human stomach where it is strongly acid?
You picked the furthest acid and got it wrong. The right answer was the left one of the pH scale between 0 and 4. This is because the stomach is acidic but not extreme. The body does try to keep it close to zero if possible.
What is the term used for themetabolic pathway in which glucose (C6 H12 O6) is degraded to carbon dioxid (CO2) and water?
Cellular respiration
Where does glycolysis take place?
Cytosol
The ATP made during glycolysis is generated by?
a. substrate-level phosphorylation
b. electron transport
c. photophosphorylation
d. chemiosmosis
A
The oxygen consumed during cellular respiration is involved directly in which process or event?
A. glycolysis
B. accepting electrons at the end of the electron support chain
c. the citric acid cycle
d. the oxidation of pyruvate to acetyl CoA
B
Which process in eukaryotic cells will proceed normally whether oxygen is present or absent?
a. electron transport
b. glycolysis
c. the citric acid cycle
d. the oxidation of pyruvate to acetyl CoA
B
Which kind of metabolic poison would most directly interfeere with glycolysis?
An agent that closely mimics the structure of glucose but is not metabolized
All fo the following are functions of the citric acid cycle except:
a. production of ATP
b. production of NADH
c. production of FADH2
d. release of CO2
e. adding electrons and proteins to oxygen, forming water
E
Which metabolic pathway is common to both cellular respiration and fermantation?
Glycolysis
The ATP made during fermentation is generated by:
Substrate-level phosphorylation
Organisms that can eist with light as an energy source and an inorganic form of carbon and other raw materials are called:
Photoautographs
Which products of light reactions of photosynthesis are utilized in the Calvin cycle?
ATP and NADPH
Where does the Calvin cycle take place?
Stroma of the chloroplast
A plant has a unique photosynthetic pigment. The leaves of this plant appear to be reddish yellow. What wavelengths of visible light are not being absorbed by this pigment?
green and yellow
Engelmann illuminated a filament of algae with light that passed through a prism, thus exponsing different segments of algae to different wavelengths of light. He added aeorbic bacteria and then noted in which areas the bacteria congregated. He noted that the largest groups were found in the areas illuminated by the red and blue light.
What did Engelmann conclude about the congregation of bacteria in the red and blue areas?
Bacteria are attracted to red and blue light and thus these wavelengths are more reactive than other wavelengths.
Engelmann illuminated a filament of algae with light that passed through a prism, thus exponsing different segments of algae to different wavelengths of light. He added aeorbic bacteria and then noted in which areas the bacteria congregated. He noted that the largest groups were found in the areas illuminated by the red and blue light.
An outcome of this experiment would help determine:
a. the relationship between heterotrophic and autotrophic organisms
b. the relationship between wavelengths of light and the rate of aerobic respiration
c. the relationship of wavelenths of light and the amount of heat resisted
d. the relationship of between the concentration of CO2 and photosynthesis
A
Engelmann illuminated a filament of algae with light that passed through a prism, thus exponsing different segments of algae to different wavelengths of light. He added aeorbic bacteria and then noted in which areas the bacteria congregated. He noted that the largest groups were found in the areas illuminated by the red and blue light.
If you ran the same experiment without without passing light through a prism, what would you predict?
a. There would be no difference in results
b. The bacteria would be relatively evenly distributed along algal filaments
c. the number of bacteria present would decrase due to an increase in the CO2 concentration
d. The number of bacteria present would increase due to the increase in CO2
C.
What does cyclic electron flow in the chloroplast produce?
ATP
As a research scientist, you measure the amount of ATP and NADPH consumed by the Calvin cycle in 1 hour. You find 30,000 molecules of ATP consumed, but only 20,000 molecules of NADPH. Where did the extra ATP molecules come from?
Cyclic electron flow
Assume a thylakoid is somehow punctured so that the interior of the thylakoid is no longer separated from the stroma. This damage will have the most direct effect on which of the following processes?
The synthesis of ATP
Where is the electron transport chain found in plant cells?
Thylakoid membrands of the chloroplasts
