BIO Quiz #4 (Energy and Enzymes)

From the graph, which of the following represents the energy of activation that has been modified by the enzyme? a) A b) B c) C

a) A

______ energy is the most important type of energy for living organisms. It is the energy available to do the work of the cell. a) Chemical b) Physical c) Thermal d) Aquatic e) Astral

a) Chemical

This graph illustrates how an enzyme catalyzes reactions to biological systems. From the energy standpoint, is this reaction an endergonic or exergonic reaction? a) Exergonic b) Endergonic c) There is not enough information in this graph to decide the type of reaction.

a) Exergonic

An exergonic reaction is ______ a) a chemical reaction that releases energy. b) a chemical reaction that do not modify energy. c) a chemical reaction that absorbs solutes. d) a chemical reaction. e) none of the above

a) a chemical reaction that releases energy.

Regulation of an enzyme can be carried out by inhibition. Name the different types of inhibitor that can avoid the binding of the substrate to the enzyme. a) competitive inhibitor and noncompetitive inhibitor b) simple inhibitor and complex inhibitor c) random inhibitor, chemical inhibitor d) denature agent inhibitor e) there is only one kind of inhibitors

a) competitive inhibitor and noncompetitive inhibitor

Denaturation of an enzyme (or any other protein) affects its ______ a) tertiary structure b) primary structure c) carboxyl end d) amino end e) functional group

a) tertiary structure

In order toe start an exergonic reaction, a certain amount of energy must be absorbed by the reactants This is called the energy of activation. From the graph, which of the following is the original energy of activation? a) A b) B c) C

b) B

What statement is true? a) Enzymes are mostly carbohydrates that catalyze chemical reactions in the cell. b) Enzymes are mostly proteins that catalyze chemical reactions in the cell. c) Enzymes are located only inside the mitochondria d) Enzymes are inorganic macromolecules that catalyze chemical reactions in the cell. e) Enzymes are only found in prokaryotes

b) Enzymes are mostly proteins that catalyze chemical reactions in the cell.

Most cellular work depends of ATP energizing molecules by transferring the third phosphate group. Mention the main types of cellular work: a) Chemical work, physiological work and metabolic work b) Transport work, chemical work and mechanical work c) Transport work, energetic work and potential d) Hard work, sloppy work and lazy work e) None of the above

b) Transport work, chemical work and mechanical work

In an enzyme the ______ is the area of the protein specific for the interaction with its ______ a) substrate/ product b) active site/ substrate c) hydrophobic internal core/ ATP d) none of the above

b) active site/ substrate

Mention some examples of inorganic helpers. a) Magnesium, Zinc, lactase, copper b) Water and lipids c) Zinc, iron, copper, magnesium d) Polysaccharides and monosaccharides e) ATP and vitamins

c) Zinc, iron, copper, magnesium

Many enzymes require inorganic helpers called ______ and organic helpers called ______ a) cohelpers...cofactors b) molecular elfs...atomic leprechauns c) cofactors...coenzymes d) inorganic particles...organic particles e) All of the above. They are synonymes

c) cofactors...coenzymes

Which of the following is a measure of disorder? a) potential energy b) kinetic energy c) entropy d) respiration e) a and b

c) entropy

The total of all the exergonic and endergonic reactions in a cell is known as ______ a) catalysis b) cataclysm c) metabolism d) phosphorylation e) Pangea

c) metabolism

An endergonic reaction yield products that are rich in ______ a) inorganic compounds b) carbohydrates c) potential energy d) ATP e) none of the above

c) potential energy

The energy of motion is called ______ a) Course energy b) Rotational energy c) Potential energy d) Kinetic energy e) Chemical energy

d) Kinetic energy

______ energy is storage energy that an object or molecule processes as a result of its location or structure. a) Positive b) Enzymatic c) Astral d) Potential e) Kinetic

d) Potential

According to the first law of thermodynamics ______ a) energy in the cell is created each time an ATP molecule is synthesized. b)energy cannot be transferred but can be transformed. c) energy can be transferred but it cannot be transformed. d) energy can be transferred and transformed, but it cannot be created or destroyed. e) both a and b

d) energy can be transferred and transformed, but it cannot be created or destroyed.