Bio 200 Exam 1 Questions with
Complete Solutions
In which situation is the energy of the system MOST spread out?
a. a couple of molecules bound to each other
b. randomly distributed molecules in a gas
c. a single molecule that is very hot
d. a chain of perfectly aligned molecules - ANS-b. randomly distributed molecules in a
gas
In which situation is the energy of the system LEAST spread out?
a.Randomly distributed molecules in a gas
b. A single huge molecule has a lot of chemical energy all in one place.
c. A few small molecules in a liquid
d. an empty vacuum - ANS-b. A single huge molecule has a lot of chemical energy all in
one place.
When energy is very spread out, we say that a system has high entropy. High entropy
correlates with:
a. high energy
b. low energy - ANS-b. low energy
Polymerization means:
a. joining or breaking any carbohydrates
b. breaking down a chain into similar small subunits
c. making a plastic chain
d. joining of similar units into a chain - ANS-d. joining of similar units into a chain
A monomer is:
a. a generic name for a single subunit in a polymer
b. a generic name for any molecule
c. a generic name for any molecule that was cut from a cellular polymer
d. a generic name for any polymer with subunits - ANS-a. a generic name for a single
subunit in a polymer
Typically, a polymer:
a. has higher entropy than a bunch of separated monomers
b. has lower entropy than a bunch of separated monomers - ANS-b. has lower entropy
than a bunch of separated monomers
Which atom is not found in a characteristic carbohydrate structure?
, a. Oxygen
b. Carbon
c. Nitrogen
d. Hydrogen - ANS-c. Nitrogen
Which statement is correct about glucose and galactose?
a. Glucose and galactose have the same physical 3-D structure
b. Glucose and galactose have the same shape but slightly different chemical formulas
c. Glucose and galactose have the same chemical formula but slightly different shapes
d. Glucose and galactose have the same component elements but in different numbers
- ANS-c. Glucose and galactose have the same chemical formula but slightly different
shapes
There are two different ring configurations for glucose (named alpha and beta). The
difference in these ring structures results from:
a. Random spinning of the bond before binding
b. Different chemical formulas for different glucose molecules
c. Nitrogen in the chemical structure - ANS-a. Random spinning of the bond before
binding
Which of these is NOT largely made up of molecules of glucose?
a. algae
b. wheat
c. all bacteria
d. all insects
e. water - ANS-e. water
How many different naturally-occurring common amino acids are there?
a. 100s
b. 12
c. 20
d. 4
e. More than 1,000 - ANS-c. 20
What aspect of the amino acid gives it a particular shape and charge unique to that
amino acid?
a. The amino group
b. The peptide bond
c. The central carbon
d. The variable R-group
e. The hydrogen - ANS-d. The variable R-group
What aspect is often charged on all amino acids in water?
a. The hydrogen
b. The amino group
Complete Solutions
In which situation is the energy of the system MOST spread out?
a. a couple of molecules bound to each other
b. randomly distributed molecules in a gas
c. a single molecule that is very hot
d. a chain of perfectly aligned molecules - ANS-b. randomly distributed molecules in a
gas
In which situation is the energy of the system LEAST spread out?
a.Randomly distributed molecules in a gas
b. A single huge molecule has a lot of chemical energy all in one place.
c. A few small molecules in a liquid
d. an empty vacuum - ANS-b. A single huge molecule has a lot of chemical energy all in
one place.
When energy is very spread out, we say that a system has high entropy. High entropy
correlates with:
a. high energy
b. low energy - ANS-b. low energy
Polymerization means:
a. joining or breaking any carbohydrates
b. breaking down a chain into similar small subunits
c. making a plastic chain
d. joining of similar units into a chain - ANS-d. joining of similar units into a chain
A monomer is:
a. a generic name for a single subunit in a polymer
b. a generic name for any molecule
c. a generic name for any molecule that was cut from a cellular polymer
d. a generic name for any polymer with subunits - ANS-a. a generic name for a single
subunit in a polymer
Typically, a polymer:
a. has higher entropy than a bunch of separated monomers
b. has lower entropy than a bunch of separated monomers - ANS-b. has lower entropy
than a bunch of separated monomers
Which atom is not found in a characteristic carbohydrate structure?
, a. Oxygen
b. Carbon
c. Nitrogen
d. Hydrogen - ANS-c. Nitrogen
Which statement is correct about glucose and galactose?
a. Glucose and galactose have the same physical 3-D structure
b. Glucose and galactose have the same shape but slightly different chemical formulas
c. Glucose and galactose have the same chemical formula but slightly different shapes
d. Glucose and galactose have the same component elements but in different numbers
- ANS-c. Glucose and galactose have the same chemical formula but slightly different
shapes
There are two different ring configurations for glucose (named alpha and beta). The
difference in these ring structures results from:
a. Random spinning of the bond before binding
b. Different chemical formulas for different glucose molecules
c. Nitrogen in the chemical structure - ANS-a. Random spinning of the bond before
binding
Which of these is NOT largely made up of molecules of glucose?
a. algae
b. wheat
c. all bacteria
d. all insects
e. water - ANS-e. water
How many different naturally-occurring common amino acids are there?
a. 100s
b. 12
c. 20
d. 4
e. More than 1,000 - ANS-c. 20
What aspect of the amino acid gives it a particular shape and charge unique to that
amino acid?
a. The amino group
b. The peptide bond
c. The central carbon
d. The variable R-group
e. The hydrogen - ANS-d. The variable R-group
What aspect is often charged on all amino acids in water?
a. The hydrogen
b. The amino group
