GCD 3022 practice questions (9-13) Questions With Complete Solutions

GCD 3022 practice questions (9-13) Questions With
Complete Solutions

( ) are parts of ( ) that do not code for amino acids. Correct
Answers Exons, pre-mRNA
*** Introns, pre-mRNA
Exons, rRNA
Introns, rRNA

A bacterial chromosome contains about 4 million (4,000,000)
base pairs. Without compaction, what is the length of the
bacterial chromosome? One base pair of DNA is approximately
0.34 nm.
(1000 nm = 1 μm, 1000 μm = 1 mm, 10 mm = 1 cm) Correct
Answers A) 1.36 nm
B) 1.36 cm
C) 1.36 μm
D)*** 1.36 mm

A bacterial chromosome typically contains Correct Answers
A)*** all of these.
B) a few thousand genes.
C) some repetitive sequences.
D) one origin of replication.

A codon is 5'-GGU-3'. An anticodon that would recognize this
codon would be Correct Answers 5'-CCA-3'
3'-GGU-5'
*** 3'-CCA-5'
5'-GGU-3'

,A diagram of a linear chromosome is shown here. The end of
each strand is labeled with A, B, C or D. Which ends could not
be replicated by DNA polymerases? Correct Answers A) A and
C
B) A and D
C)*** B and C
D) A and B

A DNA strand includes the following sequence:
5'-GATCCCCGATCCGAAATTTGACCTTTAA-3'
↑Transcription start site
If this strand is used as a template by RNA polymerase, what
would be the sequence of the synthesized RNA transcript? In
which direction would RNA polymerase slide along this strand
(from left to right or from right to left)? Correct Answers 3'-
CTAGGGGCTAGGCTTTAAACTGGAAATT-5'
From left to right
*** 3'-CUAGGGGCUAGGCUUUAAACUGGAAAUU-5'
From right to left
3'-CTAGGGGCTAGGCTTTAAACTGGAAATT-5'
From right to left
3'-CUAGGGGCUAGGCUUUAAACUGGAAAUU-5'
From left to right

A DNA strand includes the following sequence:
5'-GATCCCCGATCCGAAATTTGACCTTTAA-3'
If this strand is used as a template by DNA polymerase, what
would be the sequence of the newly made daughter strand? In
which direction would DNA polymerase slide along this
template strand (from left to right or from right to left)? Correct
Answers 5'-CTAGGGGCTAGGCTTTAAACTGGAAATT-3'

, From left to right
*** 3'-CTAGGGGCTAGGCTTTAAACTGGAAATT-5'
From right to left
5'-CTAGGGGCTAGGCTTTAAACTGGAAATT-3'
From right to left
3'-CTAGGGGCTAGGCTTTAAACTGGAAATT-5'
From left to right

A DNA strand is 5'-CGATT-3'. The complementary strand
would be Correct Answers A)*** 3'-GCTAA-5'
B) 5'-CGATT-3'
C) 5'-GCTAA-3'
D) 3'-CGATT-5'

A double-stranded DNA molecule contains 720 nucleotides.
How many complete turns occur in this double helix? Correct
Answers A)*** 36
B) 60
C) 30
D) 72

A gene encodes a pre-mRNA with 5 exons and 4 introns. A
mutation eliminates the 3' splice site from intron 3. What exons
would be found in the mRNA after splicing was completed?
Correct Answers *** Exon 1, 2, 3, 5
Exon 1, 2, 3
Exon 1, 2, 4, 5
Exon 1, 2

A human chromosome contains Correct Answers A)*** all of
these.