2.5 A: Organism Energy Strategies Quiz
1.
The diagram below shows a reaction that occurs in glycolysis.
Which statement best explains what is happening in this reaction?
(A) The phosphate group is oxidized by donating hydrogen ions to NAD+ to form NADH.
(B) The carrier molecule NAD+ is reduced by accepting electrons from the organic molecule to
become NADH.
(C) The carrier molecule NAD+ is reduced by accepting a phosphate group that releases
energy as it forms NADH.
(D) The organic molecule is oxidized by accepting a phosphate group and reacting with NAD+
to produce NADH.
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2.5 A: Organism Energy Strategies Quiz
2.
A scientist observes the rate of oxygen consumption in germinating and non-germinating peas in
sealed containers over a 20-minute period. The results are shown in the table below.
Based on the results shown, which statement best explains the observed results?
(A) The germinating peas use light to convert carbon dioxide and water into organic
molecules, and release oxygen as a waste product.
(B) The germinating peas undergo cellular respiration, which releases energy by combining
oxygen with hydrogen ions and electrons to form water.
(C) The germinating peas fix carbon and oxygen into sugar, and release carbon dioxide as a
waste product.
(D) The germinating peas undergo anaerobic fermentation, which releases energy by using
oxygen to make ethyl alcohol.
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2.5 A: Organism Energy Strategies Quiz
3.
The diagram below represents the transfer of energy through an ecosystem.
Which statement best explains the transfer of energy represented in the diagram?
(A) Autotrophs capture and store free energy only through photosynthesis, and heterotrophs
capture, store, and use free energy only through cellular respiration, during which most of
the available free energy is transformed into heat.
(B) Autotrophs and heterotrophs capture free energy transferred from decomposers, but
autotrophs capture additional free energy through photosynthesis, and both autotrophs
and heterotrophs transform free energy into heat during cellular processes.
(C) Autotrophs capture free energy only by consuming heterotrophs, heterotrophs capture free
energy from both photosynthesis and cellular respiration, and both autotrophs and
heterotrophs transform free energy into heat during energy capture.
(D) Autotrophs capture free energy through photosynthesis, heterotrophs capture free energy
by consuming autotrophs, and both autotrophs and heterotrophs use and transform free
energy into heat through cellular processes and transfer some free energy to
decomposers.
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