Molecular Biology Exam I UPDATED
ACTUAL Questions and CORRECT
Answers
Which statement about DNA is TRUE? - CORRECT ANSWER - Each strand of DNA
contains all the information needed to create a new double-stranded DNA molecule with the
same sequence information.
Which of the following is NOT a type of non-covalent interaction? - CORRECT
ANSWER - disulfide bridge
phosphate bond
Which of the following is a major characteristic of cellular DNA under typical physiological
conditions? - CORRECT ANSWER - A complete turn of the helix includes 10.5 basepairs.
The nucleus, an organelle found in eukaryotic cells, confines the ________________, keeping
them separated from other components of the cell. - CORRECT ANSWER - chromosomes
Which of the following statements about cellular DNA and RNA is FALSE? - CORRECT
ANSWER - A basepairs with T during transcription and U during replication.
During replication, DNA polymerase selects CG and AT as base pairs
During transcription, RNA polymerase synthesizes RNA using CG and AU as base pairs
DNA and RNA are different types of nucleic acid polymer. Which of the following is true of
DNA but NOT true of RNA? - CORRECT ANSWER - It contains thymine
DNA - adenine, guanine, cytosine, thymine
, RNA - adenine, guanine, cytosine, uracil
What are the complementary base pairs to the following nucleotides.
5' GTCCATATTGC 3' - CORRECT ANSWER - 3' CAGGTATAACG 5'
Each nucleotide in DNA and RNA has an aromatic base. What is the principal force that keeps
the bases in a nucleic polymer from interacting with water? - CORRECT ANSWER -
hydrophobic interactions
The nucleotide sequence that is complementary to
5'-TATAAA-3' is - CORRECT ANSWER - 5'-TTTATA-3'
The difference between RNA and DNA is the presence of a: - CORRECT ANSWER - 2'
hydroxyl group on the ribose sugar in RNA
What types of interaction occurs between stacked bases in the DNA double helix and helps to
stabilize the helix? - CORRECT ANSWER - hydrophobic interactions
Which basepair is more stable - CORRECT ANSWER - GC which has 3 hydrogen bonds
The flow of genetic information is controlled by a series of biochemical reactions that result in
the production of proteins, each with its own specific order of amino acids. What is the correct
series of biochemical reactions that represent this flow of genetic information - CORRECT
ANSWER - replication -> transcription -> translation
Although all protein structures are unique, there are common structural building blocks that are
referred to as regular secondary structures. Some have alpha helices, some have beta sheets, and
still other have a combination of both. What makes it possible for proteins to have these common
structural elements? - CORRECT ANSWER - hydrogen bonds along the protein backbone
ACTUAL Questions and CORRECT
Answers
Which statement about DNA is TRUE? - CORRECT ANSWER - Each strand of DNA
contains all the information needed to create a new double-stranded DNA molecule with the
same sequence information.
Which of the following is NOT a type of non-covalent interaction? - CORRECT
ANSWER - disulfide bridge
phosphate bond
Which of the following is a major characteristic of cellular DNA under typical physiological
conditions? - CORRECT ANSWER - A complete turn of the helix includes 10.5 basepairs.
The nucleus, an organelle found in eukaryotic cells, confines the ________________, keeping
them separated from other components of the cell. - CORRECT ANSWER - chromosomes
Which of the following statements about cellular DNA and RNA is FALSE? - CORRECT
ANSWER - A basepairs with T during transcription and U during replication.
During replication, DNA polymerase selects CG and AT as base pairs
During transcription, RNA polymerase synthesizes RNA using CG and AU as base pairs
DNA and RNA are different types of nucleic acid polymer. Which of the following is true of
DNA but NOT true of RNA? - CORRECT ANSWER - It contains thymine
DNA - adenine, guanine, cytosine, thymine
, RNA - adenine, guanine, cytosine, uracil
What are the complementary base pairs to the following nucleotides.
5' GTCCATATTGC 3' - CORRECT ANSWER - 3' CAGGTATAACG 5'
Each nucleotide in DNA and RNA has an aromatic base. What is the principal force that keeps
the bases in a nucleic polymer from interacting with water? - CORRECT ANSWER -
hydrophobic interactions
The nucleotide sequence that is complementary to
5'-TATAAA-3' is - CORRECT ANSWER - 5'-TTTATA-3'
The difference between RNA and DNA is the presence of a: - CORRECT ANSWER - 2'
hydroxyl group on the ribose sugar in RNA
What types of interaction occurs between stacked bases in the DNA double helix and helps to
stabilize the helix? - CORRECT ANSWER - hydrophobic interactions
Which basepair is more stable - CORRECT ANSWER - GC which has 3 hydrogen bonds
The flow of genetic information is controlled by a series of biochemical reactions that result in
the production of proteins, each with its own specific order of amino acids. What is the correct
series of biochemical reactions that represent this flow of genetic information - CORRECT
ANSWER - replication -> transcription -> translation
Although all protein structures are unique, there are common structural building blocks that are
referred to as regular secondary structures. Some have alpha helices, some have beta sheets, and
still other have a combination of both. What makes it possible for proteins to have these common
structural elements? - CORRECT ANSWER - hydrogen bonds along the protein backbone
