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BCH 3025 exam 2- UF Questions with Detailed
Verified Answers
Double-stranded regions of RNA:
Ans: Can form between two self-complementary regions of the same single strand of
RNA
Which of the following is a palindromic sequence?
Ans: GGATCC CCTAGG
The compound that consists of ribose linked by an N-glycosidic bond to N-9 of
adenine is:
Ans: Adenosine
In the Watson-Crick model of DNA structure (now called B-form DNA):
Ans: The bases occupy the interior of the helix
Which of the following is not true of all naturally occurring DNA?
Ans: The ratio A+T/G+C is constant for all natural DNAs
The phosphodiester bonds that link adjacent nucleotides in both RNA and DNA:
Ans: Join the 3' hydroxyl of one nucleotide to the 5' hydroxyl of the next
In the Watson-Crick model of DNA structure:
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Ans: The distance between two adjacent bases in one strand is about 3.4 Å
The difference between a ribonucleotide and a deoxyribonucleotide is:
Ans: A deoxyribonucleotide has an —H instead of an —OH at C-2
Triple-helical DNA structures can result from Hoogsteen (non Watson-Crick)
interactions. These interactions are
primarily:
Ans: Hydrogen bonds involving the bases
The phosphodiester bonds that link adjacent nucleotides in both RNA and DNA:
Ans: Join the 3' hydroxyl of one nucleotide to the 5' hydroxyl of the next
The "energy carrier" ATP is an example of a(n):
Ans: Ribonucleosidetriphosphate
In the Watson-Crick model for the DNA double helix (B form), the A-T and G-C
base pairs share which one of the
following properties?
Ans: The distance between the two glycosidic (base-sugar) bonds is the same in both
base pairs, within a few
tenths of an angstro
Which one of the following is true of the pentoses found in nucleic acids?
Ans: The pentoses are always in the beta-furanose forms
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A major component of RNA but not of DNA is:
Ans: Uracil
For the oligoribonucleotide pACGUAC:
Ans: The nucleotide at the 5' end has a phosphate on its 5' hydroxyl
The experiment of Avery, MacLeod, and McCarty in which nonvirulent bacteria were
made virulent by
transformation was significant because it showed that:
Ans: Genes are composed of DNA only
When double-stranded DNA is heated at neutral pH, which change does not occur?
Ans: The covalent N-glycosidic bond between the base and the pentose breaks
B-form DNA in vivo is a ________-handed helix, _____ Å in diameter, with a rise of
____ Å per base pair.
Ans: Right; 20; 3.4
In comparison with DNA-DNA double helices, the stability of DNA-RNA and RNA-
RNA helices is:
Ans: RNA-RNA > DNA-RNA > DNA-DNA
In double-stranded DNA:
Ans: The two strands have complementary sequences
n nucleotides and nucleic acids, syn and anti conformations relate to:
© Get it right 2025 Getaway - Stuvia US All rights reserved
BCH 3025 exam 2- UF Questions with Detailed
Verified Answers
Double-stranded regions of RNA:
Ans: Can form between two self-complementary regions of the same single strand of
RNA
Which of the following is a palindromic sequence?
Ans: GGATCC CCTAGG
The compound that consists of ribose linked by an N-glycosidic bond to N-9 of
adenine is:
Ans: Adenosine
In the Watson-Crick model of DNA structure (now called B-form DNA):
Ans: The bases occupy the interior of the helix
Which of the following is not true of all naturally occurring DNA?
Ans: The ratio A+T/G+C is constant for all natural DNAs
The phosphodiester bonds that link adjacent nucleotides in both RNA and DNA:
Ans: Join the 3' hydroxyl of one nucleotide to the 5' hydroxyl of the next
In the Watson-Crick model of DNA structure:
© Get it right 2025 Getaway - Stuvia US All rights reserved
,Click here for more: Scholars nexus
Ans: The distance between two adjacent bases in one strand is about 3.4 Å
The difference between a ribonucleotide and a deoxyribonucleotide is:
Ans: A deoxyribonucleotide has an —H instead of an —OH at C-2
Triple-helical DNA structures can result from Hoogsteen (non Watson-Crick)
interactions. These interactions are
primarily:
Ans: Hydrogen bonds involving the bases
The phosphodiester bonds that link adjacent nucleotides in both RNA and DNA:
Ans: Join the 3' hydroxyl of one nucleotide to the 5' hydroxyl of the next
The "energy carrier" ATP is an example of a(n):
Ans: Ribonucleosidetriphosphate
In the Watson-Crick model for the DNA double helix (B form), the A-T and G-C
base pairs share which one of the
following properties?
Ans: The distance between the two glycosidic (base-sugar) bonds is the same in both
base pairs, within a few
tenths of an angstro
Which one of the following is true of the pentoses found in nucleic acids?
Ans: The pentoses are always in the beta-furanose forms
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, Click here for more: Scholars nexus
A major component of RNA but not of DNA is:
Ans: Uracil
For the oligoribonucleotide pACGUAC:
Ans: The nucleotide at the 5' end has a phosphate on its 5' hydroxyl
The experiment of Avery, MacLeod, and McCarty in which nonvirulent bacteria were
made virulent by
transformation was significant because it showed that:
Ans: Genes are composed of DNA only
When double-stranded DNA is heated at neutral pH, which change does not occur?
Ans: The covalent N-glycosidic bond between the base and the pentose breaks
B-form DNA in vivo is a ________-handed helix, _____ Å in diameter, with a rise of
____ Å per base pair.
Ans: Right; 20; 3.4
In comparison with DNA-DNA double helices, the stability of DNA-RNA and RNA-
RNA helices is:
Ans: RNA-RNA > DNA-RNA > DNA-DNA
In double-stranded DNA:
Ans: The two strands have complementary sequences
n nucleotides and nucleic acids, syn and anti conformations relate to:
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