MCQ'S BIOCHEMISTRY
1. How an atom behaves when it comes
into contact with other atoms is determined by its
- a. nucleus.
- b. size.
- c. protons.
- d. neutrons.
- e. electrons.
2. Cellulose is a _____ made of
many _____.
- a. polypeptide . . . monomers
- b. carbohydrate . . . fatty acids
- c. polymer . . . glucose molecules
- d. protein . . . amino acids
- e. lipid . . . triglycerides
3. In a hydrolysis reaction, _____,
and in this process water is _____ .
- a. a polymer breaks up to form monomers
. . . consumed
- b. a monomer breaks up to form polymers
. . . produced
- c. monomers are assembled to produce a
polymer . . . consumed
- d. monomers are assembled to produce a
polymer . . . produced
- e. a polymer breaks up to form monomers
. . . produced
4. The four main categories of macromolecules
in a cell are
- a. proteins, DNA, RNA, and steroids.
- b. monosaccharides, lipids, polysaccharides,
and proteins.
- c. proteins, nucleic acids, carbohydrates,
and lipids.
- d. nucleic acids, carbohydrates, monosaccharides,
and proteins.
- e. RNA, DNA, proteins, and carbohydrates.
5. The characteristic that all lipids
have in common is
- a. they are all made of fatty acids and
glycerol.
- b. they all contain nitrogen.
- c. none of them is very high in energy
content.
- d. they are all acidic when mixed with
water.
- e. none of them dissolves in water.
6. The overall three-dimensional
shape of a polypeptide is called the
- a. double helix.
- b. primary structure.
- c. secondary structure.
- d. tertiary structure.
- e. quaternary structure.
7. Which of the following do polysaccharides
and proteins have in common?
- a. They are both made of amino acids.
- b. Their structures contain sugars.
- c. They are hydrophobic.
- d. They are large polymers.
- e. They each consist of four basic kinds
of subunits.
8. A glucose molecule is to starch
as
- a. a steroid is to a lipid.
- b. an amino acid is to a protein.
- c. a nucleic acid is to a polypeptide.
- d. a fat is to glycerol.
- e. an amino acid is to a nucleic acid.
9. Which of the following ranks
the molecules in the correct order by size?
- a. water . . . sucrose . . . glucose .
. . protein
- b. protein . . . water . . . glucose .
. . sucrose
- c. water . . . protein . . . sucrose .
. . glucose
- d. protein . . . sucrose . . . glucose
. . . water
- e. glucose . . . water . . . sucrose .
. . protein
10. Lipids differ from other large
biological molecules in that they
- a. are much larger.
- b. are not truly polymers.
- c. do not have specific shapes.
- d. do not contain carbon.
- e. contain nitrogen atoms.