AP Biology Exam

What type of transmembrane receptor is being shown?

• G-protein coupled receptor

• tyrosine kinase receptor

• gated ion channel

When glucose levels in the blood rise, your brain sends a signal to your pancreas. The pancreas releases insulin, which opens channels in cell membranes to allow glucose to enter the cell, lowering blood sugar levels. 

• Positive Feedback Response

• Negative Feedback Loop 

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Which are products of the Krebs Cycle?

• ADP, O₂, NADPH, FAD

• ATP, NADH, FADH₂, CO₂

• ATP, CO₂, NADPH, FADH₂

• ADP, O₂, NADH, FADH₂

The process of glycolysis results in which of the following molecules?

• NADH

• Pyruvate

• Glucose

• ATP

In cellular respriration, high-energy electrons that move down the electron transport chain ultimately provide the energy needed to

• transport water molecules across the membrane.

• convert ADP molecules into ATP molecules.

• convert carbon dioxide into water molecules.

• break down glucose into pyruvic acid molecules.

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What is the purpose of fermentation?

• An anaerobic pathway that allows glycolysis to keep occurring by recycling FAD+

• An aerobic pathway that allows for large amounts of ATP to be produced

• An anaerobic pathway that allows glycolysis to keep occurring by recycling NAD+

• An anaerobic pathway that allows glycolysis to keep occurring by recycling NADP+

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What is FALSE about the calvin cycle

• uses the light reactions products

• produces a three carbon sugar (G3P)

• produces carbon dioxide

• produces NADP+

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What is one function of the other pigments  besides chlorophyll, in the chloroplast?

• to block damaging wavelengths of light

• to absorb different wavelengths than the chloroplasts

• to provide different colors to the leaves

• to transfer energy to a separate photosystem beside the one using chlorophyll a and b.

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What is the primary function of the light reactions of photosynthesis?

• To produce glucose

• To produce NADPH and ATP

• To use ATP

• To produce RuBP

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What supplies the electrons that are lost in PS I?

• the electrons from PS II

• water

• glucose

• oxygen

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