Cell Biology Questions
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what part of cellular respiration is reduction?
Who discovered cyclins serendipidously?
Spermatogenesis takes place in the ______
An organism contains photosystem II but not photosystem I. From this, it can be concluded that the organismA. can produce NADPH from light energy, but not ATP.B. uses water as an electron donor, liberating oxygen gas.C. can produce both NADPH and ATP from light energy.D. can produce ATP from light energy, but not NADPH.
In photoautotrophs, the chemical energy produced by the "light" reactions (i.e., photolysis and electron transport) is used to fuel which cellular process?A. carbon fixationB. reverse electron transportC. fermentationD. glycolysisE. TCA cycle
What is the function of the cyanobacterial antenna complex?A. to absorb photons and transfer energy to the reaction centerB. to collect CO2 needed for photosynthesis and funnel it through the membraneC. to serve as the site of Calvin cycle reactions that convert CO2 into biomassD. to collect electrons from extracellular oxidations and use them to split water
Which of the following chemical pairs provides a metabolic strategy that is an example of both lithotrophy and anaerobic respiration?A. electron donor glucose; electron acceptor Fe3+B. electron donor H2; electron acceptor SO42-C. electron donor NH3; electron acceptor O2D. electron donor Fe2+; electron acceptor O2E. electron donor glucose; electron acceptor O2
Metabolism using an electron transport system is classified based on the nature of the initial electron donors and terminal electron acceptors. Lithotrophy uses __________ molecules as the __________ electron __________.A. inorganic; final; acceptorsB. organic; initial; donorsC. inorganic; initial; donorsD. organic; final; acceptors
Sulfur oxidationA. causes environmental acidification due to production of sulfuric acid.B. contributes to global warming due to methane production.C. causes environmental pollution due to production of ammonium ions.D. contributes to global warming due to CO2 production.
Hydrogenotrophy isA. the oxidation of water during photosynthesis to liberate electrons, protons, and oxygen gas.B. an award given to fuel companies that have the most fuel-efficient vehicles.C. the use of hydrogen gas as an electron donor.D. the generation of hydrogen gas by methanogens in syntrophy.
The ability to obtain energy via the oxidation of reduced sulfur compounds (e.g., H2S) is widespread among prokaryotes (both Bacteria and Archaea). Unfortunately, the nature of the major reaction end product has what effect on the immediate environment?A. produces reactive oxygen speciesB. raises the salinityC. depletes available nitrogenD. drastically lowers the pHE. produces anoxic conditions
Nitrifiers obtain energy from which of the following?A. using nitrate as a terminal electron acceptor in anaerobic respirationB. the aerobic oxidation of nitrateC. the anaerobic oxidation of ammonia using nitriteD. using nitrite as a terminal electron acceptor in anaerobic respirationE. the aerobic oxidation of ammonia and nitrite
The mitochondria has a _____ genome.
The outer membrane of the mitochondria has many ________.
Active sight & substrate are also known as
______ are much more energy rich than sugars.
T/F: Glycolysis and Kreb's cycle only make up a small fraction of cellular metabolism.
Why does the matrix of the mitochondria have a high concentration of enzymes?
The mitochondria has ___ membranes.
What proteins are found on the inner membrane of the mitochondria?