Bio 101; ch04; cellular metabolism

metabolsim refers to

• all of the chemical reactions in cell

• the reactions in the body that synthesize proteins and nucleic acids

• the breakdown of glucose molecules to release energy

one reason that protein synthesis is important is that

• enzymes are proteins and enzymes are essential to metabolism

• proteins release energy for metabolic reasons

• proteins encode DNA sequences

anabolic metabolism refers to

• all processes required to maintain life

• biochemical reactions that synthesize compounds

• biochemical reactions that release energy from nutrients

which of the following is an exampple of catabolism

• the assembly of the cell membrane from precursor molecules

• the increase in muscle tissue with exercise

• the breakdown of glucose in the cytoplasm and mitochondria

catabolism refers to

• chemical reactions that release energy

• synthesis of large molecules

• the formation of gentic material

an example of an anabolic reaction is

• many monosaccharides bonding, forming glycogen

• a dipeptide breaking down into two amino acids

• glycerol reacting with 3 fatty acid molecules to yield water and proteins

which of the following is not a characteristic of enzymes

• they speed up the rate of chemical reactions but are not used up in the process

• most are proteins

• they are most active at temperatures above 53 degrees C

an enzyme is

• a molecule, usually a protein, that speeds the rate of a biochemical reaction by lowering the activation energy

• the genetic material

• a protein that pomotes metabolic reactions by slowing reactions that are too fast

the name of an enzyme ends in

• -ese

• -ose

• -ase

which of the following best describes the interaction between an enzyme and its substrate

• the enzyme surrounds and completely contains the enzyme

• part of the enzyme temporarily binds part of the substrate molecule