Biology Multiple Choice

Which statement regarding enzymes is false: enzymes speed up reaction rate, enzymes lower activation energy of a reaction, enzyme reaction rate increases with temperature up to a certain point, enzyme reaction rate decreases as the concentration of substrate increases, all of the above

enzyme rate decreases as the concentration of substrate increases

Which of the following reactions would result in the production of water: hydrolysis reaction, formation of a disulphide bond, formation of a peptide bond, breaking a disaccharide, all of the above

formation of a peptide bond

Which of the following factors do not impact enzyme activity: temperature, substrate concentration, pH, ionic concentrations, none of the above

none of the above

A polypeptide chain is held together by

peptide bonds

Allosteric sites are responsible for

regulation enzyme activity

Which of the following does not belong: methane, cyclohexane, propanol, sodium chloride, water

sodium chloride

Cholesterol is a precursor for which: testosterone, fatty acids, trans fat, phospholipids, all of the above

testosterone

Which part of an amino acid has the greatest influence on the overall structure of a protein

the R group

Which of the following is not primarily composed of protein: hair, urine, nails, enzymes, collagen

unrine

How is a polymer formed from multiple monomers?

By the removal of an -OH group and a hydrogen atom

What makes starch different from cellulose?

Cellulose forms long filaments, while starch is highly branched.

Which carbohydrate would you find as part of a molecule of RNA?

Ribose

A reaction produces water as a product. Which statement regarding the reaction is false: a condensation reaction may have occurred, a dehydration reaction, a neutralization reaction, a hydrolysis reaction, all of the above

a hydrolysis reaction

A triglyceride is a form of ____________ composed of ________.

lipid; fatty acids and glycerol