MASTERING MICROBIOLOGY: A+ EXAM QUESTIONS WITH
CORRECT ANSWERS
Nucleotide - --Right Answer-- Monomer of DNA
Nucleoside - --Right Answer-- Molecule of ribose plus base
2-deoxyribose - --Right Answer--sugar that has a H at the 2' C
Ribose - --Right Answer--Name of five carbon sugar that is found in RNA
Basepair - --Right Answer--Two nucleotides, one with a purine & one with a pyrimidine,
connected by H bonds
Antiparallel means - --Right Answer--the two polynucleotide chains/strands run in opposite
directions
What two factors are the main determination of the Tm of DNA - --Right Answer--Amount of
G:C's & overall strand length
How many rings do purines & pyrimidines have? - --Right Answer--Purines: 2
Pyrimidines:1
The DNA from two different species can often be distinguished by a difference in the____. - --
Right Answer--Ratio of A+T to G+C
What is the difference between Uracil & Thymine - --Right Answer--Thymine has a methyl group
What did the X-ray diffraction patterns produced by Rosalind Franklin initially reveal about the
DNA molecule? - --Right Answer--It is a helical structure with distinct regularities
, You have 340 nm of double stranded B form DNA. How many 360 degree turns are present in
the double helix? - --Right Answer--100
You have 340 nm of double stranded B form DNA. How many nucleotides are present? Be
careful! - --Right Answer--2000
DNA and RNA both contain phosphate and deoxyribose. (True or False) - --Right Answer--False
In general, the keto form of thymine is more abundant than the enol form. (True or False) - --
Right Answer--True
Left-Handed helical form of DNA - --Right Answer--Z-DNA
DNA that results from reduced humidity around the DNA and is more tightly wound - --Right
Answer-- A-DNA
DNA that most closely resembles the Watson & Crick model - --Right Answer--B-DNA
Term used to describe the amount of the double helix crossing over itself - --Right Answer--
Writhe
Number of helical turns in a given space - --Right Answer--Twist
What are the main RNA secondary structures? - --Right Answer--Bulge-loop, hairpin,
pseudoknot, internal loop, and double helix
A closer association between DNA and histones most likely causes___. - --Right Answer--
repression in gene expression
CORRECT ANSWERS
Nucleotide - --Right Answer-- Monomer of DNA
Nucleoside - --Right Answer-- Molecule of ribose plus base
2-deoxyribose - --Right Answer--sugar that has a H at the 2' C
Ribose - --Right Answer--Name of five carbon sugar that is found in RNA
Basepair - --Right Answer--Two nucleotides, one with a purine & one with a pyrimidine,
connected by H bonds
Antiparallel means - --Right Answer--the two polynucleotide chains/strands run in opposite
directions
What two factors are the main determination of the Tm of DNA - --Right Answer--Amount of
G:C's & overall strand length
How many rings do purines & pyrimidines have? - --Right Answer--Purines: 2
Pyrimidines:1
The DNA from two different species can often be distinguished by a difference in the____. - --
Right Answer--Ratio of A+T to G+C
What is the difference between Uracil & Thymine - --Right Answer--Thymine has a methyl group
What did the X-ray diffraction patterns produced by Rosalind Franklin initially reveal about the
DNA molecule? - --Right Answer--It is a helical structure with distinct regularities
, You have 340 nm of double stranded B form DNA. How many 360 degree turns are present in
the double helix? - --Right Answer--100
You have 340 nm of double stranded B form DNA. How many nucleotides are present? Be
careful! - --Right Answer--2000
DNA and RNA both contain phosphate and deoxyribose. (True or False) - --Right Answer--False
In general, the keto form of thymine is more abundant than the enol form. (True or False) - --
Right Answer--True
Left-Handed helical form of DNA - --Right Answer--Z-DNA
DNA that results from reduced humidity around the DNA and is more tightly wound - --Right
Answer-- A-DNA
DNA that most closely resembles the Watson & Crick model - --Right Answer--B-DNA
Term used to describe the amount of the double helix crossing over itself - --Right Answer--
Writhe
Number of helical turns in a given space - --Right Answer--Twist
What are the main RNA secondary structures? - --Right Answer--Bulge-loop, hairpin,
pseudoknot, internal loop, and double helix
A closer association between DNA and histones most likely causes___. - --Right Answer--
repression in gene expression
