Bio 204 Exam 1 Potential Questions
1. In analyzing the number of different bases in a DNA sample, which result
would be consistent with the base-pairing rules?: A + G = C + T
2. Griffith showed that dead cells living cells into
living cells.: pathogenic; transform; nonpathogenic; pathogenic
3. Telomeres are .: repeating noncoding sequences at the ends of linear eukaryotic chromo-
somes
4. When form after an exposure to ultraviolet (UV) light, a
can remove the damaged nucleotides and replace them with normal nu-
cleotides.: thymidine dimers; nucleotide excision repair enzyme
5. What is the major difference between bacterial chromosomes and eukaryotic
chromosomes?: Bacteria have a single circular chromosome whereas eukaryotes have several linear chromo-
,somes.
6. The two sugar-phosphate strands that form the rungs of a DNA double helix
are joined to each other through .: hydrogen bonds between nucleotide bases
7. One strand of a DNA molecule has the base sequence 5'-ATAGGT-3'. The com-
plementary base sequence on the other strand of DNA will be 3'- -5'.-
: TATCCA
8. The role of DNA polymerases in DNA replication is to .: attach free
nucleotides to the new DNA strand
9. A virus that infects bacteria is called a , which is made up of the
macromolecules and .: bacteriophage; DNA; protein
10. In DNA, the two purines are , and the two pyrimidines are
: adenine and guanine; cytosine and thymine
,11. Who is credited with explaining the structure of the DNA double helix?: Watson
and Crick
12. Of the three alternative models of DNA replication, which are the
models, the one that explains how DNA replicates is the model.: con-
servative, semiconservative, and dispersive; semiconservative
13. The experiments of Meselson and Stahl showed that DNA .: replicates
in a semiconservative fashion
14. Chargaff analyzed DNA and found that the numbers of adenine
moleculesis approximately equal to the numbers of molecules and that the
, numbers of molecules is approximately equal to the numbers of
molecules.: thymine; guanine; cytosine
15. Proteins that are involved in packaging the eukaryotic chromosome into
"beads" called are .: nucleosomes; histones
16. X-ray diffraction images produced by showed that DNA is a
.: Franklin; double helix
17. In DNA replication, the next nucleotide is incorporated into the growing
polymer at the of the molecule by an enzyme called .: 3ꞌ
(hydroxyl) end; DNA polymerase
18. Evidence to support that DNA strands run antiparallel to each other includes
all of the following except .: that the sugar-phosphate backbones are to the inside of the
molecule
1. In analyzing the number of different bases in a DNA sample, which result
would be consistent with the base-pairing rules?: A + G = C + T
2. Griffith showed that dead cells living cells into
living cells.: pathogenic; transform; nonpathogenic; pathogenic
3. Telomeres are .: repeating noncoding sequences at the ends of linear eukaryotic chromo-
somes
4. When form after an exposure to ultraviolet (UV) light, a
can remove the damaged nucleotides and replace them with normal nu-
cleotides.: thymidine dimers; nucleotide excision repair enzyme
5. What is the major difference between bacterial chromosomes and eukaryotic
chromosomes?: Bacteria have a single circular chromosome whereas eukaryotes have several linear chromo-
,somes.
6. The two sugar-phosphate strands that form the rungs of a DNA double helix
are joined to each other through .: hydrogen bonds between nucleotide bases
7. One strand of a DNA molecule has the base sequence 5'-ATAGGT-3'. The com-
plementary base sequence on the other strand of DNA will be 3'- -5'.-
: TATCCA
8. The role of DNA polymerases in DNA replication is to .: attach free
nucleotides to the new DNA strand
9. A virus that infects bacteria is called a , which is made up of the
macromolecules and .: bacteriophage; DNA; protein
10. In DNA, the two purines are , and the two pyrimidines are
: adenine and guanine; cytosine and thymine
,11. Who is credited with explaining the structure of the DNA double helix?: Watson
and Crick
12. Of the three alternative models of DNA replication, which are the
models, the one that explains how DNA replicates is the model.: con-
servative, semiconservative, and dispersive; semiconservative
13. The experiments of Meselson and Stahl showed that DNA .: replicates
in a semiconservative fashion
14. Chargaff analyzed DNA and found that the numbers of adenine
moleculesis approximately equal to the numbers of molecules and that the
, numbers of molecules is approximately equal to the numbers of
molecules.: thymine; guanine; cytosine
15. Proteins that are involved in packaging the eukaryotic chromosome into
"beads" called are .: nucleosomes; histones
16. X-ray diffraction images produced by showed that DNA is a
.: Franklin; double helix
17. In DNA replication, the next nucleotide is incorporated into the growing
polymer at the of the molecule by an enzyme called .: 3ꞌ
(hydroxyl) end; DNA polymerase
18. Evidence to support that DNA strands run antiparallel to each other includes
all of the following except .: that the sugar-phosphate backbones are to the inside of the
molecule
