BIO 101 CHAPTER 7 EXAM QUESTIONS WITH CORRECT DETAILED ANSWERS
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Course
BIO 101
Institution
BIO 101
BIO 101 CHAPTER 7 EXAM QUESTIONS WITH CORRECT DETAILED ANSWERS
In eukaryotic cells, sequences of mRNA that are removed from an mRNA molecule before being translated are
Select one:
a. introns.
b. terminators. c. proteomes. d. exons.
e. anticodons. - Answer-a. introns.
In the Lac operon, th...
BIO 101 CHAPTER 7 EXAM QUESTIONS
WITH CORRECT DETAILED ANSWERS
In eukaryotic cells, sequences of mRNA that are removed from an mRNA molecule
before being translated are
Select one:
a. introns.
b. terminators.
c. proteomes.
d. exons.
e. anticodons. - Answer-a. introns.
In the Lac operon, the protein that binds to the operator to prevent transcription is
Select one:
a. lactose.
b. the repressor.
c. the promoter.
d. DNA polymerase.
e. RNA polymerase. - Answer-b. the repressor.
RNA differs from DNA in that
Select one:
a. RNA can catalyze chemical reactions.
b. RNA is usually single stranded.
c. RNA contains uracil.
d. All of the answer choices are correct.
e. RNA contains ribose. - Answer-d. All of the answer choices are correct.
The "Central Dogma" refers to
Select one:
a. passage of genetic information from DNA to RNA by translation.
b. the flow of genetic information in cells, from DNA genes to specific proteins.
c. the similarity of the energy molecule ATP to the nucleotides in DNA.
d. passage of genetic information from RNA to specific proteins by transcription.
e. inheritance of DNA genetically controlled traits from parents to offspring in every
organism. - Answer-b. the flow of genetic information in cells, from DNA genes to
specific proteins.
The 5' and 3' designations used in reference to DNA and RNA sequences are assigned
to the
Select one:
a. hydrogen atoms that form hydrogen bonds between the nucleotides.
b. carbon atoms of deoxyribose and ribose.
, c. nitrogen atoms in the nitrogen bases.
d. carbon atoms in the nitrogen base purines and pyrimidines.
e. oxygen atoms contained in the deoxyribose and ribose. - Answer-b. carbon atoms of
deoxyribose and ribose.
The DNA sequence 5'-ATCGATCG-3' will pair with which of the following RNA strands?
Select one:
a. 5'-TAGCTAGC-3'
b. 3'-AUGCAUGC-5'
c. 5'-UAGCUAGC-3'
d. 3'-TAGCTAGC-5'
e. 3'-UAGCUAGC-5' - Answer-e. 3'-UAGCUAGC-5'
The DNA sequence 5'-ATCGTACG-3' will pair with which of the following DNA strands?
Select one:
a. 5'-TAGCTAGC-3'
b. 3'-TAGCATGC-5'
c. 3'-CGTACGTA-5'
d. 5'-ATGCATGC-3'
e. 3'-ATGCATGC-5' - Answer-b. 3'-TAGCATGC-5'
The DNA subunits that form the "rungs" joining the two sides of the DNA molecule are
formed by
Select one:
a. hydrogen bonds between nitrogen base pairs.
b. ionic bonds between the phosphate pairs.
c. phosphodiester bonds between the deoxyribose sugars.
d. covalent bonds between nitrogen base pairs. - Answer-a. hydrogen bonds between
nitrogen base pairs.
The COL1A1 gene in humans is responsible for producing collagens in healthy bone
and cartilage. A mutation in COL1A1 is known to cause severe Osteogenesis
Imperfecta, which is also known as "brittle bone disease," in which bones form
irregularly and can break often, with even mild pressure and impacts. The mutation
occurs as a "nonsense" mutation, dramatically shortening the proteins, occurring
because the
Select one:
a. mutation does not occur in a codon.
b. codon that mutates causes a stop codon to occur instead of the placement of an
amino acid.
c. codon that mutates does not cause a change in the amino acid specified.
d. mutation is not in DNA.
e. codon that mutates causes a change in the amino acid specified. - Answer-b. codon
that mutates causes a stop codon to occur instead of the placement of an amino acid.
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