Exam (elaborations)
CHEM464 Exam 4 Questions answers latest update
- Course
- CHEM 464
- Institution
- California State University - Northridge
CHEM464 Exam 4 Questions answers latest update
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CHEM464 Exam 4What other name can be given to a nucleotide?
A. glycosylated nucleoside
B. purinated pentose
C. deoxyribonucleotide
D. nucleoside phosphate
D. Nucleoside Phosphate
Which of the following is NOT part of a deoxyribonucleotide?
A. a deoxyribonucleoside
B. phosphate
C. a nitrogenous base
D. ribose
D. Ribose
What name is given to the nucleotide found in DNA and NOT in RNA?
A. uridylate
B. thymidine
C. uracil
D. deoxythymidylate
D. deoxythymidylate
A strand of DNA or RNA:
A. contains 5′ - 2′ phosphodiester bonds.
B. might be an oligonucleotide.
C. has a C-terminus and an N-terminus.
D. has no charge.
B. might be an oligonucleotide.
,A property of nucleotide bases that affects the three-dimensional structure of
nucleic acids is:
A. their weakly acidic nature.
B. their absorption of UV light at wavelengths above 280 nm.
C. their hydrophilic nature.
D. their existence in tautomeric forms depending on pH.
D. their existence in tautomeric forms depending on pH.
Which statement regarding bases in DNA is false?
A. They absorb UV light.
B. Pyrimidines are aromatic; purines are not.
C. They have vertical stacking interactions.
D. They hydrogen bond between two or more complementary DNA strands.
B. Pyrimidines are aromatic; purines are not.
Some effort has been made to extract DNA from fossilized dinosaur bones that
have been buried for many million of years in arid climates. In what form is this
DNA MOST likely to be found?
A. A
B. B
C. Z
D. completely denatured
A. A
Which of the following is NOT associated with DNA structure?
A. Z-DNA
B. G tetraplexes
C. three hydrogen bonds between A and T
D. pyrimidines in the anti conformation
C. three hydrogen bonds between A and T
Which structure is found in RNA but would be the result of a mutation offaulty
annealing in DNA?
, A. hairpin
B. double-stranded helix
C. cruciform
D. bulge
D. bulge
Which statement is false regarding a solution of DNA subjected to extremes of
pH?
A. The viscosity of the solution will decrease sharply.
B. Hydrogen bonds between paired bases will be disrupted.
C. Covalent bonds in the DNA will be broken.
D. Base-stacking interactions will be disrupted.
C. Covalent bonds in the DNA will be broken.
A graduate student carefully heated DNA to about 80 °C and then prepared it for
electron microscopy. She observed several small open loops of DNA. What
conclusion did she CORRECTLY make from her observation?
A. The open loops contain DNA mutations, such as cyclobutane dimers and
deaminations.
B. The denatured DNA is the site of genes, and the annealed DNA is the site of
noncoding DNA.
C. The open loops contain DNA with a high A-T content.
D. The open loops contain denatured DNA that is being transcribed.
C. The open loops contain DNA with a high A-T content.
In its simplest form, polymerase chain reaction:
A. is remarkably insensitive to contamination.
B. requires reverse transcriptase.
C. requires two oligonucleotide primers.
D. requires a minimum of 10,000 copies of DNA to be amplified
C. requires two oligonucleotide primers.
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