Metabolism and Enzymes

What are enzymes and what is their role in metabolism?

• Enzymes are inorganic substances that slow down chemical reactions in the body and hinder metabolism.

• Enzymes are biological molecules that act as catalysts to speed up chemical reactions in the body and play a crucial role in metabolism by facilitating the conversion of one molecule into another.

• Enzymes are only involved in breaking down molecules and have no role in building new molecules in metabolism.

• Enzymes are only found in plants and have no role in metabolism.

Explain the difference between catabolic and anabolic pathways.

• Catabolic pathways involve building up molecules and requiring energy, while anabolic pathways involve breaking down molecules and releasing energy.

• Catabolic pathways do not involve releasing energy, while anabolic pathways do not involve requiring energy.

• Catabolic pathways and anabolic pathways are the same thing.

• Catabolic pathways involve breaking down molecules and releasing energy, while anabolic pathways involve building up molecules and requiring energy.

What is the role of ATP in metabolic pathways?

• ATP provides energy for metabolic pathways.

• ATP inhibits metabolic pathways

• ATP has no role in metabolic pathways

• ATP is only used for storage in metabolic pathways

How do enzymes speed up chemical reactions in the body?

• Enzymes only work in non-biological systems.

• Enzymes increase the activation energy of chemical reactions.

• Enzymes lower the activation energy of chemical reactions.

• Enzymes have no effect on the activation energy of chemical reactions.

What are the factors that can affect enzyme activity?

• Temperature, pH, substrate concentration, enzyme concentration, inhibitors, and activators

• Amount of water in the environment

• Time of day

• Color of the enzyme

Explain the concept of feedback inhibition in metabolic pathways.

• Feedback inhibition does not involve the end product of a pathway

• Feedback inhibition is a process where the end product of a pathway activates an enzyme early in the pathway

• Feedback inhibition only occurs in non-metabolic pathways

• Feedback inhibition in metabolic pathways is a regulatory mechanism where the end product of a pathway inhibits an enzyme early in the pathway, reducing the production of more product.

What is the role of coenzymes in enzyme function?

• Coenzymes compete with enzymes for substrate binding

• Coenzymes inhibit enzymes from functioning properly

• Coenzymes have no effect on enzyme function

• Coenzymes assist enzymes in their function by carrying chemical groups between enzymes.

How do competitive and non-competitive inhibitors affect enzyme activity?

• Competitive inhibitors decrease enzyme activity by directly competing with the substrate for the active site, while non-competitive inhibitors decrease enzyme activity by binding to a different site on the enzyme and changing its shape.

• Competitive inhibitors bind to a different site on the enzyme and change its shape

• Competitive inhibitors increase enzyme activity by directly competing with the substrate for the active site

• Non-competitive inhibitors have no effect on enzyme activity

What is the significance of allosteric regulation in enzyme function?

• Allosteric regulation has no effect on enzyme function

• Allosteric regulation only occurs in non-biological systems

• Allosteric regulation is a process where a molecule binds to the enzyme at a location other than the active site, resulting in a change in the enzyme's shape and activity

• Allosteric regulation increases the activation energy of chemical reactions

Explain the impact of pH on enzyme activity and provide an example.

• pH has no effect on enzyme activity

• Enzyme activity is highest at extreme pH levels

• Changes in pH can denature enzymes and affect their activity

• pH only affects non-competitive inhibitors