Metabolism and Coenzymes

Which of the following statements regarding biochemical pathways are true?

• All cell types are capable of carrying out the same biochemical pathways.

• All cell types will have the enzymes required to carry out biochemical pathways that produce energy necessary for living.

• Specialised cells carry out unique biochemical pathways required for cellular respiration.

• Biochemical pathways are reactions that start with an initial reactant which is then converted directly into a final product.

NAD+ is the example of

• a metal ion

• a coenzyme

• a prosthetic group

• an inorganic cofactor

Many coenzymes are

• sugars

• vitamins

• proteins

• peptides

Many coenzymes

• are consumed in the reaction

• accept or donate H⁺ / e^-

• become part of the products

• become a permanent part of the enzyme

Which one of the following is a example of a coenzyme?

• NADPH

• Substrate

• Lactase

• Fructase

Some enzymes require the presence of a non-protein substance.

Which of the following explain such substance in GENERAL?

• prosthetic group

• inducer

• cofactor

• coenzyme

NAD is a versatile coenzyme that is a helper for enzymes in key reactions in cellular respiration. In its _____________ form, NADH, it can _____________ hydrogens and electrons and transfer energy.

• loaded; donate

• unloaded; donate

• loaded; accept

• unloaded; accept

A coenzyme that can accept a phosphate group is ___________

A molecule that takes part in many biochemical reactions is NADP⁺.

It is correct to state that

• NADP⁺ becomes NADH when it is loaded

• NADP⁺ has a higher energy level when it is unloaded

• NADP⁺ carries additional energy when protons and electrons are added to it.

• energy is released when NADP⁺ is converted to NADPH.

Coenzymes assist the catalytic actions of enzymes. NAD is a coenzyme that functions to

• accept hydrogens and their associated electrons in its unloaded form

• accept hydrogens and their associated electrons it its reduced state.

• donate hydrogens and their associated electrons it its oxidised state.

• donate hydrogens and their associated electrons it its unloaded state.