MTU BL1020 Final Exam Questions With
Correct Answers
Viruses that attack bacteria are called
A. phages
B. proviruses
C. virulent
D. lytic - answer✔phages
___ is the genetic material for all cellular organisms and some viruses.
A. RNA
B. DNA
C. Protein
D. Chromatin - answer✔DNA
Nucleotides have a phosphate group attached at the ___ carbon atom of the sugar.
A. 2'
B. 3'
C. 5'
D. 1' - answer✔5'
Watson and Crick developed a model of DNA in which the two strands twist into the shape of a
________________.
A. circle
B. helix
C. double helix
D. double pleated sheet - answer✔double helix
Because the two strands of a DNA molecule are ________ to each other, either one can be used
as a template to reconstruct the other.
A. identical
B. antiparallel
C. bound
D. complementary - answer✔complementary
The synthesis of a growing strand of DNA is carried out by adding nucleotides to the ___ end of
an existing strand.
A. 2'
B. 3'
C. 5'
D. 1' - answer✔3'
DNA consists of two antiparallel strands of nucleotides held together by
A. peptide bonds.
B. covalent bonds.
C. ionic bonds.
D. hydrogen bonds. - answer✔hydrogen bonds
The method of DNA replication, where each original strand is used as a template to build a new
strand, is called the
A. conservative method.
B. semiconservative method.
C. disruptive method.
D. continuous method.
E. replication and amplification method. - answer✔semiconservative method
Which enzyme adds new nucleotides to the end of a growing strand?
E. endonuclease - answer✔polymerase
Who originally discovered the process of bacterial transformation?
A. Watson and Crick
B. Chargaff
C. Hershey and Chase
D. Griffith
E. Meselson and Stahl - answer✔Griffith
When a mixture of live nonvirulent bacteria and dead virulent bacteria was injected into mice,
Griffith unexpectedly found that the injected mice died. He explained this result by suggesting
that the nonvirulent bacteria are being
A. activated.
B. transformed.
C. translated.
D. transcribed.
E. expressed. - answer✔transformed
Avery and his coworkers showed that the agent responsible for changing nonvirulent bacteria
into virulent bacteria was
A. protein.
B. polysaccharide.
C. DNA.
D. RNA.
Which statement about the Hershey-Chase experiment is false?
A. DNA was labeled with radioactive phosphorus.
B. Protein was labeled with radioactive sulfur.
C. The virus-infected bacteria contained radioactive phosphorus.
D. The virus-infected bacteria contained radioactive sulfur. - answer✔The virus-infected
bacteria contained radioactive sulfur
Based on their experiment with T2 bacteriophages, Hershey and Chase concluded that
A. DNA replication is semiconservative.
B. the phage coat contains the genetic material.
C. DNA functions as the genetic material.
D. A always pairs with T and G always pairs with C.
E. virulent bacteria can transform nonvirulent bacteria. - answer✔DNA functions as the genetic
material
After attaching to a bacterial cell, a bacteriophage typically
A. injects protein into the cell.
B. extracts protein from the cell.
C. injects DNA into the cell.
D. extracts DNA from the cell.
E. transforms the cell into a virulent strain. - answer✔injects DNA into the cell
DNA primase
A. creates a short RNA primer that is complementary to an RNA template.
B. creates a short DNA primer that is complementary to an RNA template.
C. creates a short DNA primer that is complementary to a DNA template.
D. creates a short DNA template that is complementary to an RNA primer.
E. creates a short RNA primer that is complementary to a DNA template. - answer✔creates a
short RNA primer that is complementary to a DNA template.
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