Biology

Which alternative currently matches the polymer with its monomer?

• Carbohydrate-amino acid

• Nucleic acid-nucleotide

• Protein-monosaccharide

• Lipid-fat

Which level of a protein structural organization is represented by its amino acids sequence?

• Primary structure

• Tertiary structure

• Secondary structure

The most complex structure of protein is called

• Primary structure

• Tertiary structure

• Secondary structure

• Quaternary structure

At which level of structural organization do proteins have the alpha-helix shape?

• Primary structure

• Tertiary structure

• Secondary structure

One of the following molecules is building units of an enzyme molecule?

• Amino acids

• Nucleic acids

• Glucose

• Fatty acids

When an enzyme is denatured by heat or extreme pH, which one of the following does it lose?

• The peptide bond

• Primary structure

• Secondary structure

• Tertiary structure

What happens when enzymes become denatured?

• They can normally catalyze the reactions

• Their active sites are changed

• Rate of reaction increases

• Bonds holding amino acids are unaffected

Which of the following molecules is NOT a polymer?

• Protein

• Lipid

• RNA

• Starch

Which factor has a more negative effect on the functions of enzymes than the others?

• Neutral pH

• Very high temperature

• Optimal amount of substrate concentration

• Optimal amount of salt concentration

What is the intermediate compound that is formed during an enzyme catalyzed reaction?

• Reactant

• Product

• Substrate

• Quaternary structure