Bio 200 Exam 1 Questions with
Complete Answers
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 - ANSWER-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 - ANSWER-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 - ANSWER-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 - ANSWER-d. The variable R-group
What aspect is often charged on all amino acids in water?
a. The hydrogen
b. The amino group
c. The peptide bond
d. The variable R-group
e. The central carbon - ANSWER-b. The amino group
What aspect gives the protein the right amount of rigidity? In other words, what part
of the protein makes it not too loose (like a piece of floppy string) and not too rigid
(like a 2by4)?
a. The variable R-group
, b. The amino group
c. The hydrogen
d. The peptide bond
e. The central carbon - ANSWER-d. The peptide bond
Which of these protein names is most likely to be an enzyme?
a. Luciferase
b. Aspartate
c. Myelin
d. Antithamnion
e. Ubiquitin - ANSWER-a. Luciferase
Why is the peptide bond slightly more rigid than other bonds?
a. Strength of the C-C bond
b. Location of the R-group
c. Identity of the R-group
d. Resonance between the C-N and the C-O bonds
e. Whether or not there is a charged R-group - ANSWER-d. Resonance between
the C-N and the C-O bonds
True or False: All amino acids (even non polar amino acids) have a carboxyl group
that is typically charged in aqueous conditions.
a. True
b. There is no way to know for sure
c. False - ANSWER-a. True
True or False: Amino acids with hydrophobic side chains will tend to associate with
other hydrophobic side chains when possible as a way to avoid interacting with polar
water molecules.
a. False
b. It depends on the identity of the hydrophobic side chain
c. True - ANSWER-c. True
Endergonic reactions (also known as endothermic) require an input of energy.
Enzymes:
a. Will catalyze endergonic reactions preferentially
b. Cannot rapidly or frequently catalyze these reactions because they bring no
energy of their own
c. Do not ever catalyze reactions without a carbohydrate present - ANSWER-b.
Cannot rapidly or frequently catalyze these reactions because they bring no energy
of their own
A spontaneous chemical reaction will:
a. release energy
b. be endothermic
c. absorb energy from the sun - ANSWER-a. release energy
Two words that indicate that a reaction is spontaneous are:
a. exothermic, potential
b. endothermic, endergonic
Complete Answers
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 - ANSWER-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 - ANSWER-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 - ANSWER-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 - ANSWER-d. The variable R-group
What aspect is often charged on all amino acids in water?
a. The hydrogen
b. The amino group
c. The peptide bond
d. The variable R-group
e. The central carbon - ANSWER-b. The amino group
What aspect gives the protein the right amount of rigidity? In other words, what part
of the protein makes it not too loose (like a piece of floppy string) and not too rigid
(like a 2by4)?
a. The variable R-group
, b. The amino group
c. The hydrogen
d. The peptide bond
e. The central carbon - ANSWER-d. The peptide bond
Which of these protein names is most likely to be an enzyme?
a. Luciferase
b. Aspartate
c. Myelin
d. Antithamnion
e. Ubiquitin - ANSWER-a. Luciferase
Why is the peptide bond slightly more rigid than other bonds?
a. Strength of the C-C bond
b. Location of the R-group
c. Identity of the R-group
d. Resonance between the C-N and the C-O bonds
e. Whether or not there is a charged R-group - ANSWER-d. Resonance between
the C-N and the C-O bonds
True or False: All amino acids (even non polar amino acids) have a carboxyl group
that is typically charged in aqueous conditions.
a. True
b. There is no way to know for sure
c. False - ANSWER-a. True
True or False: Amino acids with hydrophobic side chains will tend to associate with
other hydrophobic side chains when possible as a way to avoid interacting with polar
water molecules.
a. False
b. It depends on the identity of the hydrophobic side chain
c. True - ANSWER-c. True
Endergonic reactions (also known as endothermic) require an input of energy.
Enzymes:
a. Will catalyze endergonic reactions preferentially
b. Cannot rapidly or frequently catalyze these reactions because they bring no
energy of their own
c. Do not ever catalyze reactions without a carbohydrate present - ANSWER-b.
Cannot rapidly or frequently catalyze these reactions because they bring no energy
of their own
A spontaneous chemical reaction will:
a. release energy
b. be endothermic
c. absorb energy from the sun - ANSWER-a. release energy
Two words that indicate that a reaction is spontaneous are:
a. exothermic, potential
b. endothermic, endergonic
