BIO 310 Exam 1, 2 and 3 MC/TF UPDATED
ACTUAL Questions and CORRECT Answers
One feature found in eukaryotes but absent in prokaryotes is the presence of a plasma membrane (T/F) - CORRECT
ANSWER - False
All 20 amino acids in nature are chiral and exist in L-configuration (T/F) - CORRECT ANSWER - False
A proteins Primary Structure and Secondary Structure are largely due to the non-covalent bonds between R groups (T/F) -
CORRECT ANSWER - False
Hydrogen bonding can only occur between polar amino acid R groups and water (T/F) - CORRECT ANSWER -
False
Eukaryotic animal cells contain mitochondria but lack chloroplasts, while eukaryotic plant cells contain chloroplasts but
lack mitochondria (T/F) - CORRECT ANSWER - False
Homolog is the general term for genes that are related by decent (T/F) - CORRECT ANSWER - True
Polypeptides containing both hydrophobic and hydrophilic residues will adopt the same folding conformation regardless
of the polarity of the molecules of the environment that surround them (T/F) - CORRECT ANSWER - False
Based on DNA sequence analysis, prokaryotic organisms are more diverse than eukaryotic organisms (T/F) - CORRECT
ANSWER - True
Disulfide bonds are a type of covalent linkage that stabilizes protein tertiary and quaternary structures (T/F) - CORRECT
ANSWER - True
The region of the antigen bound by an antibody is called the epitope (T/F) - CORRECT ANSWER - True
Mutations that change one amino acid for another can have a range of effects on the function of a protein, from no
significant different to serious damage. Which one of the following mutations would be most likely to have a serious
effect on the function of a protein?
a. S->N
b. A->V
c. D->E
d. V->L
e. N-Q - CORRECT ANSWER - S->N
Which of the following characteristics restricts the final shape of a protein to one or a few conformations, rather than an
almost unlimited number?
a. Double bonds
b. Restricted rotation
c. side-chain steric hindrance
d. Non-covalent bonds
e. None of the above - CORRECT ANSWER - Non-covalent bonds
Which of the following statements is true regarding chiral molecules?
a. Chiral molecules always have a central plane of symmetry
b. Chiral molecules have non-superimposable mirror images
c. All molecules can be chiral, existing in L- or D- configuration
d. A molecule is only chiral if it contains at least one double bond
e. None of the above - CORRECT ANSWER - Chiral molecules have non-superimposable mirror images
Which of the following is not a characteristic of all living cells?
a. They are enclosed by a plasma membrane
b. They store genetic information in DNA
c. They use the same basic set of amino acids to build proteins
d. They have a nucleus
, e. they use ribosomes for protein synthesis - CORRECT ANSWER - they have a nucleus
Which of the following amino acids sequences can contribute to the formation of disulfide bridges?
a. ETVHEETGGAHEHE
b. GHVNHHGIINIVHNG
c. GNQGQQCNNGYGY
d. SNGNSVVVYSGSYS
e. TTMPMMPGGMMEE - CORRECT ANSWER - GNQGQQCNNGYGY
Which of the following amino acids can be phosphorylated
a. Ala
b. Phe
c. Asn
d. Trp
e. Tyr - CORRECT ANSWER - Tyr
The endosymbiotic theory explains the origin of which eukaryotic cells?
a. Nucleus and endoplasmic reticulum
b. Mitochondria and chloroplasts
c. Golgi apparatus and lysosomes
d. Ribosomes and peroxisomes
e. Cytoskeleton and centrosome - CORRECT ANSWER - Mitochondria and chloroplasts
Compared to prokaryotic cells, eukaryotic cells generally...
a. Are smaller and less complex
b. contain more membrane bound organelles
c. Have a higher percentage of their genome that encodes proteins
d. are unable to perform energy metabolism
e. All of the above - CORRECT ANSWER - contain more membrane bound organelles
In the analysis of proteins using SDS-PAGE Gels...
a. Larger proteins migrate faster toward the positive electrode
b. Proteins maintain their tertiary structure whiel moving through the gel
c. separation depends on the ratio of negatively vs. positively charged R groups
d. Proteins containing smaller amino acid R groups like glycine will migrate faster than those containing large amino acid
R groups like phenylalanine
e. None of the above - CORRECT ANSWER - Proteins containing smaller amino acid R groups like glycine will
migrate faster than those containing large amino acid R groups like phenylalanine
Three bacterial samples are harvested, each from different boiling volcanic mud pots on three different continents. To
assess their evolutionary relationships, the researcher should conduct what?
a. Phylogenetic analysis of rapidly evolving genes unique to each species
b. Phylogenetic analysis of a common set of genes with rapidly evolving sequences
c. Phylogenetic analysis of slowly evolving genes unique to each species
d. Phylogenetic analysis of a common set of genes with slowly evolving sequences
e. None of the above - CORRECT ANSWER - d. Phylogenetic analysis of a common set of genes with slowly
evolving sequences
During gel electrophoresis, larger DNA fragments, which contain more negative charge, migrate faster through the gel
toward the positive electrode (T/F) - CORRECT ANSWER - False
A human gamete is 1n and contains 23 chromosomes (T/F) - CORRECT ANSWER - True
The same nucleotide sequence can be cut by more than one restriction enzymes (T/F) - CORRECT ANSWER -
True
Each eukaryotic chromosome contains a single origin of replication with two replication forks moving in opposite
directions (T/F) - CORRECT ANSWER - False
ACTUAL Questions and CORRECT Answers
One feature found in eukaryotes but absent in prokaryotes is the presence of a plasma membrane (T/F) - CORRECT
ANSWER - False
All 20 amino acids in nature are chiral and exist in L-configuration (T/F) - CORRECT ANSWER - False
A proteins Primary Structure and Secondary Structure are largely due to the non-covalent bonds between R groups (T/F) -
CORRECT ANSWER - False
Hydrogen bonding can only occur between polar amino acid R groups and water (T/F) - CORRECT ANSWER -
False
Eukaryotic animal cells contain mitochondria but lack chloroplasts, while eukaryotic plant cells contain chloroplasts but
lack mitochondria (T/F) - CORRECT ANSWER - False
Homolog is the general term for genes that are related by decent (T/F) - CORRECT ANSWER - True
Polypeptides containing both hydrophobic and hydrophilic residues will adopt the same folding conformation regardless
of the polarity of the molecules of the environment that surround them (T/F) - CORRECT ANSWER - False
Based on DNA sequence analysis, prokaryotic organisms are more diverse than eukaryotic organisms (T/F) - CORRECT
ANSWER - True
Disulfide bonds are a type of covalent linkage that stabilizes protein tertiary and quaternary structures (T/F) - CORRECT
ANSWER - True
The region of the antigen bound by an antibody is called the epitope (T/F) - CORRECT ANSWER - True
Mutations that change one amino acid for another can have a range of effects on the function of a protein, from no
significant different to serious damage. Which one of the following mutations would be most likely to have a serious
effect on the function of a protein?
a. S->N
b. A->V
c. D->E
d. V->L
e. N-Q - CORRECT ANSWER - S->N
Which of the following characteristics restricts the final shape of a protein to one or a few conformations, rather than an
almost unlimited number?
a. Double bonds
b. Restricted rotation
c. side-chain steric hindrance
d. Non-covalent bonds
e. None of the above - CORRECT ANSWER - Non-covalent bonds
Which of the following statements is true regarding chiral molecules?
a. Chiral molecules always have a central plane of symmetry
b. Chiral molecules have non-superimposable mirror images
c. All molecules can be chiral, existing in L- or D- configuration
d. A molecule is only chiral if it contains at least one double bond
e. None of the above - CORRECT ANSWER - Chiral molecules have non-superimposable mirror images
Which of the following is not a characteristic of all living cells?
a. They are enclosed by a plasma membrane
b. They store genetic information in DNA
c. They use the same basic set of amino acids to build proteins
d. They have a nucleus
, e. they use ribosomes for protein synthesis - CORRECT ANSWER - they have a nucleus
Which of the following amino acids sequences can contribute to the formation of disulfide bridges?
a. ETVHEETGGAHEHE
b. GHVNHHGIINIVHNG
c. GNQGQQCNNGYGY
d. SNGNSVVVYSGSYS
e. TTMPMMPGGMMEE - CORRECT ANSWER - GNQGQQCNNGYGY
Which of the following amino acids can be phosphorylated
a. Ala
b. Phe
c. Asn
d. Trp
e. Tyr - CORRECT ANSWER - Tyr
The endosymbiotic theory explains the origin of which eukaryotic cells?
a. Nucleus and endoplasmic reticulum
b. Mitochondria and chloroplasts
c. Golgi apparatus and lysosomes
d. Ribosomes and peroxisomes
e. Cytoskeleton and centrosome - CORRECT ANSWER - Mitochondria and chloroplasts
Compared to prokaryotic cells, eukaryotic cells generally...
a. Are smaller and less complex
b. contain more membrane bound organelles
c. Have a higher percentage of their genome that encodes proteins
d. are unable to perform energy metabolism
e. All of the above - CORRECT ANSWER - contain more membrane bound organelles
In the analysis of proteins using SDS-PAGE Gels...
a. Larger proteins migrate faster toward the positive electrode
b. Proteins maintain their tertiary structure whiel moving through the gel
c. separation depends on the ratio of negatively vs. positively charged R groups
d. Proteins containing smaller amino acid R groups like glycine will migrate faster than those containing large amino acid
R groups like phenylalanine
e. None of the above - CORRECT ANSWER - Proteins containing smaller amino acid R groups like glycine will
migrate faster than those containing large amino acid R groups like phenylalanine
Three bacterial samples are harvested, each from different boiling volcanic mud pots on three different continents. To
assess their evolutionary relationships, the researcher should conduct what?
a. Phylogenetic analysis of rapidly evolving genes unique to each species
b. Phylogenetic analysis of a common set of genes with rapidly evolving sequences
c. Phylogenetic analysis of slowly evolving genes unique to each species
d. Phylogenetic analysis of a common set of genes with slowly evolving sequences
e. None of the above - CORRECT ANSWER - d. Phylogenetic analysis of a common set of genes with slowly
evolving sequences
During gel electrophoresis, larger DNA fragments, which contain more negative charge, migrate faster through the gel
toward the positive electrode (T/F) - CORRECT ANSWER - False
A human gamete is 1n and contains 23 chromosomes (T/F) - CORRECT ANSWER - True
The same nucleotide sequence can be cut by more than one restriction enzymes (T/F) - CORRECT ANSWER -
True
Each eukaryotic chromosome contains a single origin of replication with two replication forks moving in opposite
directions (T/F) - CORRECT ANSWER - False
