BIOL 350 FINAL EXAM COMPLETE
QUESTIONS AND CORRECT ANSWERS
\.How does an RNA binding protein recognize an RNA molecule with a specific
sequence?
A It has positively charged amino acids that bind to the negatively charged
phospho diester backbone of RNA
B It forms hydrogen bonds with the bases via the major groove of an RNA double
helix
C it recognizes the specific 3-dimensional structure that the RNA sequence forms
D It recognizes the extra hydroxyl group on the ribose sugar of RNA - ANSWERS✔-
C it recognizes the specific 3-dimensional structure that the RNA sequence forms
\.What is the function of the centromere?
A. it is the end of the chromosome
B. it is the DNA sequence to which a kinetochore protein complex attaches
C. It is the sequence at which DNA replication starts
D. it is a microtubule organizing center - ANSWERS✔-B. it is the DNA sequence to
which a kinetochore protein complex attaches
,\.Where might you find a tetra loop?
A. in an RNA molecule
B. At the end of a chromosome
C. at a centromere
D. in a single strand of DNA - ANSWERS✔-A. in an RNA molecule
\.To what part of DNA do histone proteins bind?
A. They hydrogen bond with the bases of nucleotides throuogh the major groove
B. The bind covalently to ribose sugars of nucleotides.
C. They bind specific DNA sequences called histone binding sites
D. They bond to the negatively charged phosphate groups on the outside of the
DNA double helix - ANSWERS✔-D. They bond to the negatively charged phosphate
groups on the outside of the DNA double helix
\.What does transfer RNA do?
A. It transports the correct amino acid to the ribosome
B. it transfers the RNA primer during DNA replication
C. It forms the peptide bond
D. It transfers an acetyl group onto histone proteins - ANSWERS✔-A. It transports
the correct amino acid to the ribosome
,\.How many chromosomes are present in a human cell in G2-phase of the cell
cycle?
A. 22
B. 46
C. 92
D. 23 - ANSWERS✔-C. 92
\.Which one of the following structures has a prominent major groove?
A. Z-form of DNA
B. A-form of DNA
C. An RNA double helix
D. B-form of DNA - ANSWERS✔-D. B-form of DNA
\.What is a special property that the amino acid proline has?
A. It has a very small side chain so that it can allow sharp turns in a polypeptide
B. It is positively charged and therefore an important component of histone
proteins.
C. It can form disulfide bonds with other cysteine amino acids
D. It disrupts alpha-helices in proteins - ANSWERS✔-D. It disrupts alpha-helices in
proteins
, \.What carbon on the ribose sugar has an extra hydroxyl group that is absent in
deoxyribose?
A. carbon 4
B. carbon 5
C. carbon 3
D. carbon 2 - ANSWERS✔-D. carbon 2
\.An example of a covalent bond is...
A. the bonds between a DNA binding protein and DNA
B. the bonds that keep nucleotides attached to each other in a single strand of
DNA
C. the bonds that keep two DNA strands attached to each other in a double helix
D. the bonds that form a stem loop structure in RNA. - ANSWERS✔-B. the bonds
that keep nucleotides attached to each other in a single strand of DNA
\.What is a function of the tails of core histone proteins that stick out of
nucleosomes?
A. They are modified to form a code that impacts what happens with the
packaged DNA
B. They attached to chromosome scaffolding to form a chromatin fiber
QUESTIONS AND CORRECT ANSWERS
\.How does an RNA binding protein recognize an RNA molecule with a specific
sequence?
A It has positively charged amino acids that bind to the negatively charged
phospho diester backbone of RNA
B It forms hydrogen bonds with the bases via the major groove of an RNA double
helix
C it recognizes the specific 3-dimensional structure that the RNA sequence forms
D It recognizes the extra hydroxyl group on the ribose sugar of RNA - ANSWERS✔-
C it recognizes the specific 3-dimensional structure that the RNA sequence forms
\.What is the function of the centromere?
A. it is the end of the chromosome
B. it is the DNA sequence to which a kinetochore protein complex attaches
C. It is the sequence at which DNA replication starts
D. it is a microtubule organizing center - ANSWERS✔-B. it is the DNA sequence to
which a kinetochore protein complex attaches
,\.Where might you find a tetra loop?
A. in an RNA molecule
B. At the end of a chromosome
C. at a centromere
D. in a single strand of DNA - ANSWERS✔-A. in an RNA molecule
\.To what part of DNA do histone proteins bind?
A. They hydrogen bond with the bases of nucleotides throuogh the major groove
B. The bind covalently to ribose sugars of nucleotides.
C. They bind specific DNA sequences called histone binding sites
D. They bond to the negatively charged phosphate groups on the outside of the
DNA double helix - ANSWERS✔-D. They bond to the negatively charged phosphate
groups on the outside of the DNA double helix
\.What does transfer RNA do?
A. It transports the correct amino acid to the ribosome
B. it transfers the RNA primer during DNA replication
C. It forms the peptide bond
D. It transfers an acetyl group onto histone proteins - ANSWERS✔-A. It transports
the correct amino acid to the ribosome
,\.How many chromosomes are present in a human cell in G2-phase of the cell
cycle?
A. 22
B. 46
C. 92
D. 23 - ANSWERS✔-C. 92
\.Which one of the following structures has a prominent major groove?
A. Z-form of DNA
B. A-form of DNA
C. An RNA double helix
D. B-form of DNA - ANSWERS✔-D. B-form of DNA
\.What is a special property that the amino acid proline has?
A. It has a very small side chain so that it can allow sharp turns in a polypeptide
B. It is positively charged and therefore an important component of histone
proteins.
C. It can form disulfide bonds with other cysteine amino acids
D. It disrupts alpha-helices in proteins - ANSWERS✔-D. It disrupts alpha-helices in
proteins
, \.What carbon on the ribose sugar has an extra hydroxyl group that is absent in
deoxyribose?
A. carbon 4
B. carbon 5
C. carbon 3
D. carbon 2 - ANSWERS✔-D. carbon 2
\.An example of a covalent bond is...
A. the bonds between a DNA binding protein and DNA
B. the bonds that keep nucleotides attached to each other in a single strand of
DNA
C. the bonds that keep two DNA strands attached to each other in a double helix
D. the bonds that form a stem loop structure in RNA. - ANSWERS✔-B. the bonds
that keep nucleotides attached to each other in a single strand of DNA
\.What is a function of the tails of core histone proteins that stick out of
nucleosomes?
A. They are modified to form a code that impacts what happens with the
packaged DNA
B. They attached to chromosome scaffolding to form a chromatin fiber
