Macromolecules, Enzymes Question Preview (ID: 19450)


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Which of the following macromolecules are a prominent part of animal tissues that function in insulation, helping animals conserve heat?
a) Carbohydrates
b) Lipids
c) Proteins
d) Nucleic Acids

What is the function of enzymes in biological systems?
a) Enzymes act as products to create new chemical reactions.
b) Enzymes act as substrates when the necessary proteins are unavailable.
c) Enzymes act as catalysts to drive chemical reactions forward.
d) Enzymes bond with substrates to create the new reaction products.

Peroxidase is an enzyme that breaks down hydrogen peroxide in cells. It accomplishes this because of its structure. What part of the enzyme is involved in catalytic activity?
a) Pleated sheet
b) Quaternary structure
c) Binding pocket
d) Active site

Proteins are formed from monomers (subunits) called —
a) nucleic acids
b) fatty acids
c) amino acids
d) nucleotides

Enzymes only work with specific substrates because each substrate —
a) can only use a specific ionic bond with the enzyme
b) has a specific activation site for enzyme attachment
c) destroys its specific enzyme
d) actively interferes with other substrates around it

Most cellular activities are processes regulated by the action of —
a) lipids
b) enzymes
c) carbohydrates
d) polysaccharides

Amino acids link together by peptide bonds to form proteins. In which cellular organelle would this process occur?
a) Mitochondrion
b) Ribosome
c) Lysosome
d) Golgi body

Both lipids and carbohydrates are important in animal cells because both —
a) form cell walls
b) store energy
c) contain nitrogen
d) provide insulation

C6H12O6 is an example of a:
a) carbohydrate
b) lipid
c) protein
d) nucleic acid

Something that is made up of a phosphate, deoxyribose, and a nitrogen base would be considered a:
a) carbohydrate
b) lipid
c) protein
d) nucleic acid

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