AP Biology Unit 8

The H+ concentration gradient is formed to

• make NADPH

• split a water molecule

• generate ATP

• form water

If the proton (H+) pump in the thylakoid was not working which molecule could not be made during the light reaction?

• NADPH

• ATP

• Water

• Oxygen gas

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NGSS.HS-LS1-5

ATP is made during the light reaction using all of the following EXCEPT

• proton pump

• hydrogen ion gradient

• electron energy from photosystem II

• NADPH donating electrons

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NGSS.HS-LS1-5

An _____  can make its own food, while a _____ cannot make its own food.

• Autotroph, Heterotroph 

• Heterotroph, Autotroph

• Chlorophyll, Chloroplast 

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Endergonic reactions require:

• an input of energy

• a release of energy

• do not change energy

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The electrons travel though the ___________, a series of electron carrier proteins.

• stroma

• electron transport chain

• chloroplasts

ATP Synthase is a membrane protein, through which excess __________ escape the thylakoid in a process that makes ATP.

• water ions

• NADPH ions

• Hydrogen ions

Most chemical reactions in the body rely on enzymes. Why are enzymes are necessary for many cellular reactions?

• The reactions are too slow to meet the needs of the cell if enzymes are missing

• The reactions take up too much space in the cell if enzymes are missing

• Enzymes change reactants from solid to liquid during the reactions.

• Enzymes supply the oxygen necessary for the reactions.

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NGSS.HS-PS1-2

The human body maintains a temperature of around 98.6 degrees at all times. Enzymes are involved in almost every chemical reaction in the body. Which of the following describes the connection between these two statements?

• The body is kept relatively warm to prevent too much enzyme action.

• The body needs to be warm to prevent hypothermia.

• Enzymes function best at a specific temperature.

• There is no connection between the two statements.

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What happens when enzymes are heated to a high temperature?

• The enzymes die.

• The shapes of the enzyme are altered denature

• The enzymes' amino acid sequence changes.

• The enzymes remain the same

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NGSS.HS-LS1-1