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Enzymes

Enzymes

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Biology

University

Easy

Created by

Thiaga Letchumi

Used 1+ times

FREE Resource

37 Slides • 9 Questions

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​Chapter 3 Enzymes

By Thiaga Letchumi

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  • Enzymes are Biological Catalysts. They increase the rate of metabolic reactions.

  • Almost all biological reactions involve Enzymes.

  • Enzymes are globular proteins with a specific tertiary shape. They are usually specific to only one reaction.

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Multiple Choice

How does enzyme speed up a chemical reaction?

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By lowering the activation energy, the amount of energy needed for reaction to begin

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By increasing the activation energy

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By increasing the temperature of the reaction

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By increasing the amount of reactant available

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Fill in the Blank

Many enzymes consist of non protein part called _____?

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Multiple Select

Cofactors may be which of the following

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Cations (positively charged metal ions, Activators)

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Organic molecules, Vitamins or vitamin products (Coenzymes)

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Prosthetic group that permanently binds to enzyme

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Enzyme inhibitors

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Multiple Choice

Holoenzyme + Apoenzyme = Coenzyme (Cofactors)

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True

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False

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Multiple Choice

The active site will undergo a conformational change when exposed to a substrate to improve binding.

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Lock and key mechanism

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Induced fit hypothesis

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Multiple Choice

The enzyme active site is extremely sensitive to changes in pH and temperature.

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true

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false

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Multiple Choice

Increasing enzyme concentration will increase rate of reaction as more reaction sites are available for the substrate.

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False

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True

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Multiple Choice

Increasing substrate concentration will increase the rate reaction even when the enzyme active site is saturated.

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False

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True

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Multiple Choice

Enzyme inhibitors block or distort the enzyme active site.

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True

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False

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​Myasthenia gravis

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Neostigmine is a drug that used to treat the symptoms , by improving muscle strength. Its a competitive inhibitor of acetyl choline esterase

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​Uses of Enzymes

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​Chapter 3 Enzymes

By Thiaga Letchumi

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