Review Quiz: Diffusion and Metabolism

Diffusion is:

• the movement of particles in a substance from an area of high concentration to an area of low concentration.

• the movement of particles in a substance from an area of low concentration to an area of high concentration.

• the movement of particles in a substance from an area of low density to an area of high density.

• the movement of particles in a substance from an area of high density to an area of low density.

Select all statements about enzymes that are true:

• Without enzymes, many reactions would occur too slowly to maintain life.

• Enzymes are special proteins that can speed up a reaction.

• Enzymes are used up in a reaction.

• Enzymes are used in catabolic and anabolic reactions.

Select all statements that are true:

• The substrate is a molecule or molecules that has a particular shape inside a specific enzyme.

• The substrate stays the same in a chemical reaction.

• The substrate is a molecule or molecules that has a particular shape that allows it to attach to a specific enzyme.

• The substrate is what will be changed in a chemical reaction.

Catabolic reactions:

• occur when a larger molecule has been split into smaller ones.

• occur when smaller molecules are joined to form a larger one.

• require energy to form new bonds.

• releases energy to break bonds

Anabolic reactions:

• occur when a larger molecule has been split into smaller ones.

• occur when smaller molecules are joined to form a larger one.

• require energy to form new bonds.

• releases energy to break bonds

Select all statements that are true: Metabolism:

• are chemical processes that maintain life.

• are all chemical reactions that occur in the body.

• are chemical reactions that can be broken into two groups: catabolic reactions and anabolic reactions.

• are chemical reactions that can be broken into two groups: reactions that break down matter and reactions that build complex molecules from simpler substances.

What is the 'active site'?

• The Enzyme.

• The Substrate.

• The region of the enzyme that binds to the substrate.

• The region of the substrate that binds to the enzyme.

Select all examples of anabolic reactions:

• In live and muscle cells, individual sugar molecules are joined together into long chain carbohydrates by enzymes

• In the digestive system, consumed carbohydrates are long chains are broken down by enzymes into individual sugar molecules.

• In the digestive system, consumed proteins are long gains of amino acids that are broken down by enzymes into individual amino acids.

• In all body cells individual amino acids are joined together into long chain proteins (e.g. muscle fibres, hormones, etc.) by enzymes.

Select all examples of catabolic reactions:

• In live and muscle cells, individual sugar molecules are joined together into long chain carbohydrates by enzymes

• In the digestive system, consumed carbohydrates are long chains are broken down by enzymes into individual sugar molecules.

• In the digestive system, consumed proteins are long gains of amino acids that are broken down by enzymes into individual amino acids.

• In all body cells individual amino acids are joined together into long chain proteins (e.g. muscle fibres, hormones, etc.) by enzymes.