Chemistry of Life Test
How many different kinds of polypeptides each composed of 5 amino acids, could be synthesized using the 20 common amino acids?
20^5
This regulates blood glucose by forcing cells to release or produce MORE glucose
Glucagon
Which of the following is TRUE of BOTH starch and cellulose? a. They are both polymers of glucose b. they are geometric isomers of each other c. they can both be digested by humans d. they are both used for energy storage in plants
a. They are both polymers of glucose
An organic compound is one that a. contains carbon and hydrogen b. is slightly acidic c. forms long chains d. is soluble in water
a. contains carbon and hydrogen
One gram of this will release 9 calories when burned a. fate b. protein c. carbohydrate d.nucleic acids
a. fat
All of the following are carbohydrates except: a. polypeptide b. glycogen c. polysaccharide d. glucose
a. polypeptide
Which would NOT be an expected consequence of changing one amino acid in a particular protein? a. the genetic material would all remain the same b. the primary structure would be changed c. the tertiary structure might be changed d. the biological activity of this protein might be altered
a. the genetic material would all remain the same
What is a fat or triglycerol? a. a protein with tertiary structure b. a lipid made of three fatty acids and glycerol c. a kind of lipid that makes up much of the plasma membrane d. a molecule formed from three alcohols
b. a lipid made of three fatty acids and glycerol
The primary structure of a protein is a. an alpha helix or a pleated sheet b. the amino acid sequence of the polypeptide chain c. composed of two or more polypeptide chains d. maintained by hydrogen bonds
b. amino acid sequence of the polypeptide chain
What of the following is not a protein? a. hemoglobin b. cholesterol c. an antibody d. an enzyme
b. cholesterol
Each of the following is a polymer except: a. protein b. glucose c. cellulose d. starch
b. glucose
Glucose + Galactose = a. Fructose b. Lactose c. Maltose d. sucrose
b. lactose
The tertiary structure of a protein is the a. bonding together of several polypeptides chains by weak bonds b. three dimensional shape c. order in which amino acids are joined in a peptide chain
b. three dimensional shape
Bonded glucose that composes cell walls and is not easily digested a. chitin b. insulin c. cellulose
c. cellulose
The cohesion of water is caused by: a. ionic bonds b. hydrophobic compounds c. hydrogen bonds d. covalent bonds
c. hydrogen bonds
Glucose + Glucose = a. Fructose b. Lactose c. Maltose d. sucrose
c. maltose
A simple ring of sugars (example glucose) a. dissaccharides b. pentose c. monosaccharides d. polysaccharides
c. monosaccharides
Which type of lipid is most important in biological membranes a. fat b. wax c. phospholipid d. oil
c. phospholipid
Most hormones are classified as a. proteins b. insulin c. steroids d. estrogen
c. steroids
Hydrophillic properties are characteristics of all the following except: a. polar molecules b. molecules soluble in water c. the long hydrocarbon chain components of some molecules d. all are hydrophillic properties
c. the long hydrocarbon chain components of some molecules
Which of the following is not a hormone type: a. steroids b. amines c. peptides d. ATP
d. ATP
Which of the following are polysaccharides? a. RNA & DNA b. Glucose & Sucrose c. Cholesterol d. Glucagon & Starch e. Uracil & Thymine
d. Glycogen and Starch
altering which of the following levels of structure organization could change the function of the protein? a. primary b. secondary c. tertiary d. all of the above
d. all of the above
All of the following are carbohydrates except: a. starch b. glycogen c. chitin d. cholesterol
d. cholesterol
Carbohydrates normally function in animals as a. the functional units of lipids b. enzymes in the regulation of metabolic processes c. a component of triglycerides d. energy-storage molecules
d. energy-storage molecules
What is the highest level of protein structure shown by a molecule of hemoglobin> a. tertiary b. primary c. secondary d. quaternary
d. quaternary
This regulates blood glucose by forcing body cells to absorb and use glucose
insulin