SUFFOLK UNIVERSITY - BIOLOGY EXAM 3 QUESTIONS WITH VERIFIED ANSWERS
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Course
SUFFOLK UNIVERSITY - BIOLOGY
Institution
SUFFOLK UNIVERSITY - BIOLOGY
SUFFOLK UNIVERSITY - BIOLOGY EXAM 3 QUESTIONS WITH VERIFIED ANSWERS
Which of the following Is NOT required for transcription?
(a) a DNA template
(b) A primer
(c) Ribonucleoside triphosphates
(d) RNA polymerase
(e) All of the above are required for transcription - Answer-A primer .....becau...
SUFFOLK UNIVERSITY - BIOLOGY
EXAM 3 QUESTIONS WITH VERIFIED
ANSWERS
Which of the following Is NOT required for transcription?
(a) a DNA template
(b) A primer
(c) Ribonucleoside triphosphates
(d) RNA polymerase
(e) All of the above are required for transcription - Answer-A primer .....because there is
NO primers needed for synthesis of mRNA in transcription
DNA is composed of two strands, only one of which typically is used as a template for
RNA synthesis. By what mechanism is the correct strand chosen?
(a) The promoter acts to direct RNA polymerase
(b) An initiation factor informs the system which strand to use
(c) Only on strand has a start codon
(d) Both strands are tried, and the one that works is remembered
(e) It is chosen randomly - Answer-(a) The promoter acts to direct the RNA polymerase
Aside from using T instead of U, the "coding strand" of DNA is _______________ to the
mRNA.
(a) complementary and parallel
(b) complementary and antiparallel
(c) complementary and in a random order
(d) identical in sequence
(e) identical in sequence but antiparallel - Answer-(d) identical in sequence
Exons are:
(a) much larger than genes
(b) larger than the original coding region
(c) spliced out of the original transcript
(d) spliced together from the original transcript
(e) spliced to introns to form the final transcript - Answer-(d) spliced together from the
original transcript
The poly A tail added to pre-mRNA
, (a) is coded for by DNA
(b) is attached to its 5' end
(c) increases mRNA stability
(d) reduces mRNA stability
(e) allows it to be reverse transcribed. - Answer-(c) increases mRNA stability (...through
the interactions of proteins at the poly (A) tail)
A codon is ______________ nucleotides long, and there are ______________ different
possible codons in total. - Answer-3; 64
The adaptor between mRNA and a protein is:
(a) tRNA
(b) a prometer
(c) RNA polymerase
(d) DNA polymerase
(e) DNA - Answer-(a) tRNA
In order to ensure that the protein made is the one specified by mRNA...
(a) tRNA must read mRNA correctly
(b) tRNA must carry the correct amino acid
(c) covalent bonding between the base pairs must occur
(d) Both a and b
(e) Both b and c - Answer-Both a and b
A charged tRNA has ______________ attached.
(a) an mRNA molecule
(b) an rRNA molecule
(c) a phosphate group
(d) one of more sugar groups
(e) an amino acid - Answer-(e) an amino acid
Ribosomes are a collection of _______________ that are needed for
_________________.
(a) small proteins; translation
(b) proteins and rRNAs; translation
(c) proteins and tRNAs; transcription
(d) proteins and mRNAs; translation
(e) mRNAs and tRNAs; translation - Answer-(b) proteins and rRNAs; translation
During translation elongation, the existing polypeptide chain is attached to:
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