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The electrons that are passed to NADP+ at the end of the electron transfer chain were obtained from ____.


A) water
B) CO2
C) glucose
D) sunlight
E) ATP

Correct Answer

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What do free radicals do?


A) Improve the efficiency of aerobic respiration.
B) Act as coenzymes in glycolysis.
C) Damage biological molecules.
D) Remove metals that combine with oxygen gas.
E) Enhance enzyme activity.

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C

In most plants, glucose is stored as ____.


A) glucose
B) starch
C) sucrose
D) glycogen
E) cellulose

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Which product(s) are formed in lactate fermentation?


A) ethanol only
B) lactate only
C) ethanol and lactate
D) ethanol and carbon dioxide
E) lactate and carbon dioxide

Correct Answer

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According to evidence from ice layers from the Antarctic, atmospheric carbon dioxide levels have been rising since ____.


A) the dinosaurs went extinct
B) about 10,000 years ago
C) the industrial revolution began
D) the 1970s
E) humanevolved200,000yearsago

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The carbon dioxide acceptor in the Calvin-Benson cycle of photosynthesis is ____.


A) phosphoglycerate (PGA)
B) ribulose bisphosphate (RuBP)
C) phosphoglyceraldehyde (PGAL)
D) glucose
E) Phosphoenolpyruvate

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To break down a glucose molecule completely, how many "turns" of the Krebs cycle are required?


A) ​2
B) ​3
C) ​4
D) ​6
E) ​12

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When glucose is used as the energy source, the largest amount of ATP is produced in ____.


A) glycolysis
B) acetyl-CoA formation
C) the Krebs cycle
D) fermentation
E) electron transfer phosphorylation

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Which group of molecules serves as inputs for the light-independent reactions?


A) H2O, ATP, and NADPH
B) CO2, NADPH, and H2O
C) CO2 and NADPH
D) ATP, NADPH, H2O, and CO2
E) NADPH, ATP, and CO2

Correct Answer

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Match each description with the corresponding term.

Premises
A process resulting in the formation of ATP, NADH, and CO2
Responses
glycolysis
electron transfer phosphorylation
lactate fermentation
alcoholic fermentation
the Krebs cycle

Correct Answer

glycolysis
electron transfer phosphorylation
lactate fermentation
alcoholic fermentation
the Krebs cycle

When chlorophyll absorbs light energy, ____.


A) chlorophyll is converted to carotene
B) the molecules begin to move more rapidly
C) the plant becomes radioactive
D) electrons jump to a higher energy level
E) the molecules become ionized

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In animal skeletal muscles, white muscle fibers ____.


A) have an abundance of myoglobin
B) make ATP by lactate fermentation
C) produce ethanol
D) are good for sustained activities
E) are not found in chickens

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You are a botanist living in the desert. A friend asks you which plant would be most practical to plant in their yard. What is your answer?


A) Any plant, as long as it is well-watered
B) Only C3 plants
C) Only C4 plants
D) Only CAM plants
E) C3 or C4 plants, but not CAM plants

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We know that carbon dioxide levels were in the atmosphere millions of years ago through ____.


A) radioisotope dating
B) measuring carbon dioxide levels in fossil fuel samples
C) measuring carbon isotope ratios in fossil fuel samples
D) measuring carbon dioxide levels in air pockets in ice cores
E) measuring carbon isotope ratios in air pockets in ice cores

Correct Answer

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Which of the following molecules is/are formed at the end of the electron transfer process?


A) ATP only
B) NADPH only
C) ATP and NADPH
D) NADP+
E) ATP and NADP+

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C

Pigments are ____.


A) inorganic molecules that absorb all light
B) organic molecules that absorb all light
C) inorganic molecules that absorb specific wavelengths of light
D) organic molecules that absorb specific wavelengths of light
E) inorganic molecules that reflect specific wavelengths of light

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The stroma of a chloroplast is most like which cellular structure?


A) ribosomes
B) cell membranes
C) the cytoplasm
D) nuclei
E) mitochondria

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If an aerobic organism stopped taking in oxygen, which process would stop first?


A) the splitting of glucose into two pyruvates
B) the reduction of NAD+ to NADH
C) the release of carbon dioxide
D) electron transfer phosphorylation
E) the initiation of the Krebs Cycle

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If a pigment absorbed violet, yellow, orange, red, and green light, what color would it appear to be?


A) white
B) brown
C) black
D) blue
E) gray

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The three main categories of energy-producing foods are ____.


A) fats, carbohydrates and vitamins
B) fats, vitamins and proteins
C) fats, carbohydrates and proteins
D) fats, carbohydrates and alcohol
E) carbohydrates, vitamins and proteins

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C

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