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Enzymes and Enzyme Regulation Quiz

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Questions and Answers

What makes enzymes different from most other catalysts?

They require high temperatures for catalysis

They alter the equilibrium of a reaction

They are highly specific (correct)

They are consumed in chemical reactions

Which of the following is true about enzyme inhibitors?

They increase enzyme activity

They are catalysts

They decrease enzyme activity (correct)

They are not affected by other molecules

What is the main effect of enzyme activators on enzyme activity?

Decrease activity

Inactivate the enzyme

Increase activity (correct)

No effect

Which statement is true about enzyme catalysis?

Enzymes make reactions occur many times faster than usual Signup and view all the answers

What is a common feature of enzymes in terms of reaction specificity?

They exhibit high specificity with few side products Signup and view all the answers

How can the activity of enzymes be regulated?

Through cofactors and inhibitors Signup and view all the answers

What is the reason behind the unusual amino acid composition of collagen being unsuited for alpha helices or beta sheets?

The high content of Glycine and Proline Signup and view all the answers

Which amino acid residues make up approximately 30% of the residues in collagen?

Glycine and Proline Signup and view all the answers

How are the hydroxylated amino acids in collagen synthesized?

Post-translationally Signup and view all the answers

In which protein structure are long stretches of Gly-Pro-(Pro/HyP) commonly found?

Collagen triple helix Signup and view all the answers

What type of secondary structure is predominantly observed in myohemerythrin?

Alpha helix Signup and view all the answers

Which type of proteins show structural diversity reflecting functional diversity?

Globular proteins Signup and view all the answers

What are some denaturants that can lead to protein unfolding?

Temperature, pH, organic solvents Signup and view all the answers

Which denaturant is commonly used in chemical denaturation of proteins?

Urea Signup and view all the answers

What is the main factor contributing to thermal denaturation of proteins?

Increase in temperature Signup and view all the answers

Enzymes accelerate chemical reactions by:

Lowering the activation energy Signup and view all the answers

Enzymes are typically named based on:

The reaction they catalyze Signup and view all the answers

The suffix -ase is usually added to enzyme names based on:

The name of the substrate or type of reaction Signup and view all the answers