Biochemistry Flashcards

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0
Q

How do the properties of water allow it to move through the vessels in a plant?

A

Cohesion allows water to be pulled along a pathway.

Adhesion resists the downward pull of gravity while cohesion uses a pulling force.

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1
Q

How do enzymes catalyze a reaction?

A

Enzymes lower the activation energy needed start a reaction, speeding up the rate of chemical reactions

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2
Q

How does a non competitive inhibitor decrease the rate of an enzyme reaction?

A

It changes the shape or the enzymes active site

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3
Q

What does it mean if a chemical reaction has a positive ΔG or a negative ΔG?

A

Positive: ΔG is endothermic and spontaneous
Negative: ΔG is endothermic and isn’t spontaneous

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4
Q

What does the induced fit hypothesis of an enzyme say?

A

Suggests in the presence of the substrate the active site may change in order to fit the substrates change.

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5
Q

What factors denature enzymes

A

Changes in pH, temp, and ionic strength

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6
Q

Difference between primary, secondary, and tertiary structure if proteins

A

Primary is the amino acid sequence. Secondary is the alpha helix. Tertiary is the entire chain either everything.

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7
Q

Difference between hydrophobic and hydrophilic substances?

A

Hydro repels water, hydrophilic loves water.

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8
Q

What is the mechanism in which the end product of a metabolic pathway inhibits an earlier step in the pathway?

A

Feedback inhibiton

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9
Q

What process builds polymers and what breaks them down?

A

Hydrolysis breaks down polymers

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10
Q

Why does ice float in water

A

Bc ice is less sense than the water, the hydrogen bonds keep the molecules of ice farther.

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