comp check 5.1/5.2

How is the Calvin cycle connected to the light reactions? The Calvin cycle needs an NADPH produced in the light reactions. All of these are correct The light-induced electron flow changes the shape of four Calvin cycle enzymes. The light-induced pH changes activate rubisco. The Calvin cycle needs the ATP produced in the light reactions.

All of these are correct

The immediate source of energy for ATP synthesis in chloroplasts is energized chlorophylls. the electrochemical proton gradient. electron transport. light. NADPH.

the electrochemical proton gradient.

The component of aerobic respiration that produces the most ATP per mole of glucose is the electron transport chain. glycolysis. alcoholic fermentation. the citric acid cycle. lactic acid fermentation.

the electron transport chain.

Which of the following is the balanced equation for the generation of sugar from sunlight, water, and CO2? None of these are correct 12 CO2 + 12 H2O = 2 C6H12O6 + 2 O2 6 CO2 + 12 H2O = C6H12O6 + 6 O2 + 6 H2O 6 CO2 + 6 H2O = C6H12O6 + 6O2

6 CO2 + 6 H2O = C6H12O6 + 6O2

Which statement given below best characterizes the properties of a photosystem? Photosystems do not contain proteins. A photosystem consists of one antennae pigment. There is only one photosystem in green plants. A photosystem is a complex of pigments, proteins, and reaction center chlorophyll. A photosystem spans the chloroplast membrane.

A photosystem is a complex of pigments, proteins, and reaction center chlorophyll.

The light reactions of photosynthesis provide the Calvin cycle with CO2 and glucose. light and chlorophyll. water and photons. ATP and NADPH. protons and electrons.

ATP and NADPH.

Which of the following do photosynthesis and respiration have in common? All of the above ATP synthesis in both processes relies on the chemiosmotic mechanism. In eukaryotes, both processes occur in the mitochodrion. Both require light. Both require cyclic electron transport.

ATP synthesis in both processes relies on the chemiosmotic mechanism.

A person on a dangerously severe diet will eventually suffer from malnutrition and even starvation. If a person does not eat enough to fuel sufficient ATP and NADH production for biological activities, energy sources will be depleted. Which of the following represents the correct order in which this depletion takes place? Fats --> glycogen --> proteins Fats --> proteins --> glycogen Glycogen --> proteins --> fats Proteins --> glycogen --> fats Glycogen --> fats --> proteins

Glycogen --> fats --> proteins

Cyanide inhibits the enzyme (cytochrome C oxidase) in the mitochondrial electron transport chain that reduces O2 to water; i.e., O2 cannot be used in glucose catabolism. Suppose that you add cyanide to a suspension of muscle cells from a rat. Which statement given below is the most accurate with respect to the effects of cyanide on glucose catabolism? The citric acid cycle would not be inhibited, but glycolysis would. The citric acid cycle, and glycolysis would be stimulated. The citric acid cycle, and glycolysis would be inhibited. The citric acid cycle would be inhibited, but glycolysis would not; and lactic acid would accumulate. The citric acid cycle would be inhibited, but glycolysis would not; and ethanol would accumulate.

The citric acid cycle would be inhibited, but glycolysis would not; and lactic acid would accumulate.

What was proved by experiments tracing isotopes of oxygen through the process of photosynthesis? The reduction of carbon dioxide is the source of electrons for photosynthesis. Oxygen is the final electron acceptor in the electron transport chain. The oxygen produced by photosynthesis comes from carbon dioxide. The oxygen produced by photosynthesis comes from water. Carbon dioxide is the source of the oxygen in earth's atmosphere.

The oxygen produced by photosynthesis comes from water.

Which of the following statements about ATP is false? The synthesis of ATP is an endergonic reaction. The hydrolysis of ATP to ADP and Pi is an exergonic reaction. The phosphate bond energy of ATP may be transformed into light. ATP is not a product of fermentation. The phosphate bond energy of ATP is used to power catabolic metabolism.

The phosphate bond energy of ATP is used to power catabolic metabolism.

How does the reduction of pyruvate to lactic acid during fermentation allow glycolysis to continue in the absence of oxygen? This reaction is coupled to the oxidation of NADH to NAD+. This reaction is a kinase reaction. This reaction is coupled to the formation of ATP. This reaction is coupled to the reduction of NAD+ to NADH. Water is formed during this reaction.

This reaction is coupled to the oxidation of NADH to NAD+.

For the citric acid cycle to proceed, it is necessary for an acetyl group to bind to oxaloacetate. water to be oxidized. pyruvate to bind to oxaloacetate. carbon dioxide to bind to oxaloacetate. acetyl CoA to be reduced.

an acetyl group to bind to oxaloacetate.

Plants are green because energized chlorophyll a emits green light. chlorophylls absorb green light. chlorophylls absorb blue and orange-red wavelengths of light and reflect green light. chloroplasts transmit green light. plants do not possess green pigment.

chlorophylls absorb blue and orange-red wavelengths of light and reflect green light.

To be metabolized, glucose first must be converted to glucose 6-phosphate. This _______________ ATP, and thus this step is ______________. Overall glycolysis is ________________ , and _______________ ATP, and NADH. consumes; exergonic; endergonic; produces releases; exergonic; endergonic; consumes consumes; endergonic; exergonic; produces releases; exergonic; endergonic; consumes releases; endergonic; endergonic; produces

consumes; endergonic; exergonic; produces

The ultimate source of energy for ATP synthesis in chloroplasts is light. the electrochemical proton gradient. electron transport. glucose. energized chlorophylls.

light

In photosynthesis, NADPH is used for the reduction of 3-phosphoglycerate (3PG). reduction of O2 to water. oxidation of 3-phosphoglycerate (3PG). synthesis of ATP. regeneration phase of the Calvin cycle.

reduction of 3-phosphoglycerate (3PG).

The major product of photosynthesis that is exported from the leaves to the rest of the plant is nucleotides. glucose. amino acids. starch. sucrose.

sucrose.

Animals inhale air containing oxygen and exhale air with less oxygen and more carbon dioxide. Most of the carbon dioxide comes from hydrocarbons and the air. glycolysis. waste products. the citric acid cycle. pyruvate oxidation.

the citric acid cycle.

During the fermentation of one molecule of glucose, the net production of ATP is _______ molecule(s). eight two six three one

two