Assuming you can digest all of them, which of the following carbohydrates has the greatest energy value per gram?
a. starch
b. sugar
c. glycogen
d. cellulose
e. none of these, because they all have the same energy value
e. none of these, because they all have the same energy
100
The building blocks of a triglyceride molecule are...
a. sugars and starches
b. amino acids and glycerol
c. glycogen and fatty acids
d. fatty acids and glycerol
e. nucleic acids and amino acids
d. fatty acids and glycerol
100
Which of the following is not normally a function of proteins in healthy cells?
a. long-term energy storage
b. functioning as enzymes
c. a component of cell membranes
a. long-term energy storage
100
Which of the following would provide the greatest amount of energy when burned by cells?
a. one gram of sugar
b. one gram of starch
c. one gram of protein
d. one gram of fat
d. one gram of fat
100
Which six elements make up most of the mass of living cells?
a. phosphorus
b. helium
c. oxygen
d. hydrogen
e. potassium
f. sulfur
g. nitrogen
h. iron
i. sodium
j. carbon
a. phosphorus, c. oxygen, d. hydrogen, f. sulfur, g. nitrogen, j. carbon
200
When sugars polymerize in long chains, they may form any of the following except:
a. glycogen
b. starch
c. cellulose
d. proteins
d. proteins
200
Which organic molecule below is most closely related to lipids?
a. amino acids
b. CH2 chains
c. nucleotides
d. sugars
b. CH2 chains
200
Proteins are made up of long chains of which of these building blocks?
a. amino acids
b. glycerol molecules
c. nucleic acids
d. sugars
e. fatty acids
a. amino acids
200
DNA stores:
a. fat
b. carbohydrates
c. energy
d. hereditary information
d. hereditary information
200
When a bond results from the transfer of electrons between atoms, it's a(n) ___ bond that has formed.
a. ionic
b. nuclear
c. metallic
d. covalent
a. ionic
300
Which of the following molecules are classified as carbohydrates?
a. amino acids
b. fats
c. nucleotides
d. sugars
d. sugars
300
When an enzyme binds with its substrate, the activation energy needed for the chemical reaction to occur is increased
a. true
b. false
b. false, decreased
300
Amino acids are monomers of
a. dissacharides
b. proteins
c. nucleotides
d. steroids
b. proteins
300
Which of the following molecules are most closely related to nucleic acids?
a. amino acids
b. fats
c. nucleotides
d. sugars
c. nucleotides
300
Which of the following is an example of an organic chemical compound?
a. sodium chloride, NaCl
b. Glucose, C6H12O6
c. Carbon dioxide, CO2
d. sulfur trioxide, SO3
b. glucose, C6H12O6
400
Polysaccharides are:
a. carbohydrates
b. lipids
c. proteins
d. nucleic acids
a. carbohydrates
400
Lipids are:
a. soluble in water
b. made of chains of amino acids
c. linked together with peptide bonds
d. used by the body for storing energy
d. used by the body for storing energy
400
Which of the following molecules are closely related to proteins?
a. amino acids
b. monosaccharides
c. nucleotides
d. sugars
a. amino acids
400
Which of the following is not a part of the nucleotide in a DNA molecule?
a. three phosphate groups
b. a sugar
c. a base
d. a phosphate group
a. three phosphate groups
400
The bonds between atoms in organic molecules such as sugars, fats and proteins are:
a. metallic bonds
b. covalent bonds
c. ionic bonds
d. nuclear bonds
b. covalent bonds
500
Plants store glucose in the form of:
a. starch
b. glycogen
c. cellulose
d. chitin
a. starch
500
All of the following are examples of lipids except:
a. oil
b. starch
c. steroids
d. candle wax
b. starch
500
The overall shape of a single chain of amino acids in a protein is that protein's:
a. primary structure
b. secondary structure
c. tertiary structure
d. quaternary structure
c. tertiary structure
500
The molecule on which an enzyme acts is called a(n):
a. active site
b. inactive site
c. polar molecule
d. substrate
d. substrate
500
Which of the following characteristics of water is not a result of hydrogen bonding?
a. adhesive strength
b. capillarity
c. cohesive strength
d. all of the above are a result of a hydrogen bonding
d. all of the above are a result of hydrogen bonding