Exam 4: Enzymes and Energy

Pyruvate dehydrogenase catalyzes the removal of hydrogen from pyruvic acid.

Chemically reduced FAD has __________ extra hydrogen atom(s)bound to it.

Enzymes are specific for a given substrate.

The vitalist concept was defeated because of fermentation experiments involving

A common reducing agent used to couple chemical reactions in cells is

______________ occurs when the product of a metabolic pathway binds to an enzyme and decreases enzymatic activity.

Cellular respiration results in a(n)______________ in entropy as glucose is broken down to form carbon dioxide.

The flow of energy in living systems is termed

Energy transformations result in a(n)______________ in entropy.

The pH optimum for enzymes secreted by the stomach is higher than the pH optimum for enzymes secreted by the pancreas.

Isomers are different forms of an enzyme.

An atom or molecule that is oxidized is also a reducing agent.

The amount of entropy increases as bonds are broken to generate glucose from glycogen.

Regulation of a metabolic pathway by the final product of the pathway is termed

Consuming extra niacin and riboflavin in the diet will provide extra energy for body functions.

The rate at which a chemical reaction can be increased is by either ______________ the temperature or ______________ the activation energy.

The conversion of glucose to galactose is catalyzed by an isomerase.

A defect in the enzyme which converts phenylalanine into tyrosine is characteristic of the disease

Addition of substrate when enzyme reaction rate is maximal results in

A common oxidizing agent used to couple chemical reactions in cells is