BS 161 Exam 3 UPDATED ACTUAL
Questions and CORRECT Answers
What are chromosomes made of?
DNA, RNA, and proteins
DNA and proteins
DNA, heterochromatin, and histone proteins
DNA
DNA and euchromatin - CORRECT ANSWER - DNA and Proteins
Which of the following is true of DNA during interphase?
It is in the form of highly condensed chromosomes and is unavailable for gene expression.
It exists as chromatin and is unavailable for gene expression.
It exists as chromatin and is less condensed than mitotic chromosomes.
It is in the form of highly condensed chromosomes; it is called heterochromatin.
It exists as chromatin; it is completely uncoiled and loose. - CORRECT ANSWER - It
exists as chromatin and is less condensed than mitotic chromosomes.
Which of the following represents the order of increasingly higher levels of organization of
chromatin?
nucleosome, looped domain, 30-nm chromatin fiber
30-nm chromatin fiber, nucleosome, looped domain
nucleosome, 30-nm chromatin fiber, looped domain
looped domain, nucleosome, 30-nm chromatin fiber
looped domain, 30-nm chromatin fiber, nucleosome - CORRECT ANSWER -
nucleosome, 30-nm chromatin fiber, looped domain
Which of the following sets of materials are required by both eukaryotes and prokaryotes for
replication?
, double-stranded DNA, four kinds of dNTPs, primers, origins of replication
topoisomerases, telomerases, polymerases
G-C rich regions, polymerases, chromosome nicks
nucleosome loosening, four dNTPs, four rNTPs
ligase, primers, nucleases - CORRECT ANSWER - double-stranded DNA, four kinds of
dNTPs, primers, origins of replication
Which of the enzymes synthesizes short segments of RNA?
I. helicase
II. DNA polymerase III
III. ligase
IV. DNA polymerase I
V. primase - CORRECT ANSWER - primase
Which of the enzymes removes the RNA nucleotides from the primer and adds equivalent DNA
nucleotides to the 3' end of Okazaki fragments?
I. helicase
II. DNA polymerase III
III. ligase
IV. DNA polymerase I
V. primase - CORRECT ANSWER - DNA polymerase I
RNA processing converts the RNA transcript into _____.
a protein
DNA
a eukaryotic cell
mRNA
a polypeptide - CORRECT ANSWER - mRNA
Questions and CORRECT Answers
What are chromosomes made of?
DNA, RNA, and proteins
DNA and proteins
DNA, heterochromatin, and histone proteins
DNA
DNA and euchromatin - CORRECT ANSWER - DNA and Proteins
Which of the following is true of DNA during interphase?
It is in the form of highly condensed chromosomes and is unavailable for gene expression.
It exists as chromatin and is unavailable for gene expression.
It exists as chromatin and is less condensed than mitotic chromosomes.
It is in the form of highly condensed chromosomes; it is called heterochromatin.
It exists as chromatin; it is completely uncoiled and loose. - CORRECT ANSWER - It
exists as chromatin and is less condensed than mitotic chromosomes.
Which of the following represents the order of increasingly higher levels of organization of
chromatin?
nucleosome, looped domain, 30-nm chromatin fiber
30-nm chromatin fiber, nucleosome, looped domain
nucleosome, 30-nm chromatin fiber, looped domain
looped domain, nucleosome, 30-nm chromatin fiber
looped domain, 30-nm chromatin fiber, nucleosome - CORRECT ANSWER -
nucleosome, 30-nm chromatin fiber, looped domain
Which of the following sets of materials are required by both eukaryotes and prokaryotes for
replication?
, double-stranded DNA, four kinds of dNTPs, primers, origins of replication
topoisomerases, telomerases, polymerases
G-C rich regions, polymerases, chromosome nicks
nucleosome loosening, four dNTPs, four rNTPs
ligase, primers, nucleases - CORRECT ANSWER - double-stranded DNA, four kinds of
dNTPs, primers, origins of replication
Which of the enzymes synthesizes short segments of RNA?
I. helicase
II. DNA polymerase III
III. ligase
IV. DNA polymerase I
V. primase - CORRECT ANSWER - primase
Which of the enzymes removes the RNA nucleotides from the primer and adds equivalent DNA
nucleotides to the 3' end of Okazaki fragments?
I. helicase
II. DNA polymerase III
III. ligase
IV. DNA polymerase I
V. primase - CORRECT ANSWER - DNA polymerase I
RNA processing converts the RNA transcript into _____.
a protein
DNA
a eukaryotic cell
mRNA
a polypeptide - CORRECT ANSWER - mRNA
