The term enzymes, was first used in 1878. the term is derived from a greek word that means in yeast because the yeast cells were first to reveal enzyme activity in living organisms. what do you know about the physical and chemical properties of enzymes?

each enzyme can function under a wide range of temperature and ph conditions within the human body.
nearly all enzymes are proteins, although a few catalytically active rna molecules have been identified.
enzymes are not highly specific with respect to substrates and can be used interchangeably.
enzymes are catalysts that increase the rate of a chemical reaction without being changed themselves in the process.
many enzymes require the presence of small, non-protein units or cofactors to carry out their particular reaction.
enzymes are catalysts that increase the rate of a chemical reaction without being changed themselves in the process.

Answer; nearly all enzymes are proteins, although a few catalytically active RNA have been identified

Many enzymes require the presence of small protein units or cofactors to carry out their particular reaction

Enzymes are catalyst that increases the rate of chemical reaction without being changes themselves in the process

Explanation:

Enzymes are highly specialized proteins which have catalytic powers.they are made from specific instructions directed by the gene.they lose their catalytic ability when denatured by extreme temp and pH

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

straight or amphibians are homeothermic to thermal