Cellular Energetics Review

An enzyme is exposed to various treatments and then examined to see whether denaturation occurred. Which treatment below would be LEAST LIKELY to cause an effect on the enzyme?

• The addition of water

• A change in temperature

• The addition of salt

• A change in pH

The enzyme alpha amylase can be found in saliva and helps to start the digestion of food. In order to work optimally, calcium and chlorine ions must be bound to it. In this example, calcium and chlorine are examples of...

• Vitamins

• Cofactors

• Allosteric factors

• Coenzymes

A reaction takes place that breaks down a protein to its amino acid monomers. What type of reaction would this be classified as?

• Anabolic

• Catabolic

• Kinetic

• Metabolic

Which statement is NOT true regarding ATP?

• It is the molecule organisms use as a source of energy.

• It is composed of adenine, ribose, and phosphate groups.

• Organisms obtain energy by breaking the bond between the first and second phosphate group.

• The free phosphate group can move to another molecule to give its energy in a process known as phosphorylation.

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Enzymes catalyze reactions by ...

• Slowing the movement of molecules.

• Being consumed in reactions.

• Allowing feedback inhibition.

• Lowering the activation energy.

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Complete the formula for photosynthesis: _____ + 6H₂0 --> C₆H₁₂O₆ + 6CO₂

• 6CO₂

• ATP

• 4CH₂O

• Glucose

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The oxygen that is released as a byproduct in photosynthesis us derived from ...

• Glucose

• Carbon Dioxide

• Water

• NADPH

The light dependent reactions occur in the _____ and the Calvin cycle occurs in the ____.

• Chloroplast, Mitohcondria

• Mesophyll, Stomata

• Bundle sheath cells, stromal lamellae

• Thylakoid membrane, Stroma

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Without water, plants would die. From the list below, which option provides the most accurate explanation for why plants cannot survive without water.

• The splitting of water fixes carbon dioxide in the Calvin cycle, allowing for the production of G3P.

• The splitting of water provides the electrons needed to turn ADP to ATP in the Calvin Cycle.

• Oxygen is provided during the splitting of water, which is necessary for plant tissues.

• The electrons gathered from the splitting of water allows for the conversion of NADP+ to NADPH in the light dependent reactions.

The Calvin cycle must take place 3 times in order to produce 6 molecules of G3P. Why then does the plant only receive 1 molecule of G3P? What happens to the other 5 molecules?

• Excess G3P is converted to starch.

• The remaining 5 G3P molecules are used to directly fix carbon dioxide.

• RuBP must be regenerated in order to fix carbon dioxide, so the remaining molecules of G3P are used for its regeneration.

• Excess G3P is lost to the surroundings.

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