MMSC 491 QUIZZES 1-4 QUESTIONS WITH VERIFIED
ANSWERS
In a DNA double helix each type of base forms a stable base pair with only one type of
base. When bases on an RNA strand are involved in base pairing, which bases can
form stable base pairs with more than one type of base? - Answers - Guanine and
Uracil
Regarding the structure of bases in nucleic acids, which, if any, of the following
statements is incorrect? - Answers - Purines carry an amino group, unlike pyrimidines
Regarding the sugar residues in nucleic acids, which, if any, of the following statements
is incorrect? - Answers - The internal sugar residues in a DNA strand normally have free
hydroxyl groups, unlike those in an RNA strand
Regarding DNA replication, which, if any, of the following statements is incorrect? -
Answers - DNA replication is said to be semi-conservative because for each DNA helix
only one strand serves as a template for new DNA synthesis
Regarding DNA replication and DNA synthesis, which, if any, of the following
statements is incorrect? - Answers - A DNA polymerase always requires a DNA
template to synthesize a complementary DNA
Which is the best definition of noncoding RNA? - Answers - A functional RNA that is not
translated to make a protein
If we take the number of chromosomes in a haploid sperm cell or egg cell to be n and
the total content of genomic DNA to be c, what is the number of chromosomes and the
total genomic DNA content of a diploid G1 phase cell and in a diploid G2 phase cell
from the same organism. - Answers - 2n chromosomes, DNA content of 2C in G1; 2n
chromosomes, DNA content of 4C in G2
Regarding the cell cycle, which, if any, of the following statements is correct? - Answers
- The M phase is the only phase in the cycle when chromosomes stained with chemical
dyes are visible under the light microscope
Which of the following statements is incorrect? - Answers - The only structural
difference between DNA and RNA strands is that they have different sugars,
respectively deoxyribose and ribose
Which of the following statements is incorrect? - Answers - A-T base pairs are stronger
than G-C base pairs
ANSWERS
In a DNA double helix each type of base forms a stable base pair with only one type of
base. When bases on an RNA strand are involved in base pairing, which bases can
form stable base pairs with more than one type of base? - Answers - Guanine and
Uracil
Regarding the structure of bases in nucleic acids, which, if any, of the following
statements is incorrect? - Answers - Purines carry an amino group, unlike pyrimidines
Regarding the sugar residues in nucleic acids, which, if any, of the following statements
is incorrect? - Answers - The internal sugar residues in a DNA strand normally have free
hydroxyl groups, unlike those in an RNA strand
Regarding DNA replication, which, if any, of the following statements is incorrect? -
Answers - DNA replication is said to be semi-conservative because for each DNA helix
only one strand serves as a template for new DNA synthesis
Regarding DNA replication and DNA synthesis, which, if any, of the following
statements is incorrect? - Answers - A DNA polymerase always requires a DNA
template to synthesize a complementary DNA
Which is the best definition of noncoding RNA? - Answers - A functional RNA that is not
translated to make a protein
If we take the number of chromosomes in a haploid sperm cell or egg cell to be n and
the total content of genomic DNA to be c, what is the number of chromosomes and the
total genomic DNA content of a diploid G1 phase cell and in a diploid G2 phase cell
from the same organism. - Answers - 2n chromosomes, DNA content of 2C in G1; 2n
chromosomes, DNA content of 4C in G2
Regarding the cell cycle, which, if any, of the following statements is correct? - Answers
- The M phase is the only phase in the cycle when chromosomes stained with chemical
dyes are visible under the light microscope
Which of the following statements is incorrect? - Answers - The only structural
difference between DNA and RNA strands is that they have different sugars,
respectively deoxyribose and ribose
Which of the following statements is incorrect? - Answers - A-T base pairs are stronger
than G-C base pairs
