Quiz 19: Ribosomes and Transfer Rna
Biology
Q 1Q 1
The crystal structure of IF1 bound to the 30S ribosomal subunit shows that IF1 binds to the _____________ of the ribosome.
A)E site
B)P site
C)A site
D)allosteric site
E)S15 protein
Free
Multiple Choice
C
Q 2Q 2
Match the following levels of tRNA structure with the descriptions below.
A.Primary structure
B.Secondary structure
C.Tertiary structure
D.Quaternary structure
E.1-dimensional structure
-The tRNA nucleotide base sequence.A
Free
Multiple Choice
A
Q 3Q 3
Match the following levels of tRNA structure with the descriptions below.
A.Primary structure
B.Secondary structure
C.Tertiary structure
D.Quaternary structure
E.1-dimensional structure
-The three-dimensional shape of tRNA.C
Free
Multiple Choice
C
Q 4Q 4
Match the following levels of tRNA structure with the descriptions below.
A.Primary structure
B.Secondary structure
C.Tertiary structure
D.Quaternary structure
E.1-dimensional structure
-The formation of a stem loop structure by nucleotide base pairing.B
Free
Multiple Choice
Q 5Q 5
Match the following levels of tRNA structure with the descriptions below.
A.Primary structure
B.Secondary structure
C.Tertiary structure
D.Quaternary structure
E.1-dimensional structure
-The "clover-leaf" structure of tRNA.B
Free
Multiple Choice
Q 6Q 6
Match the following levels of tRNA structure with the descriptions below.
A.Primary structure
B.Secondary structure
C.Tertiary structure
D.Quaternary structure
E.1-dimensional structure
-tRNA that resembles an inverted L.C
Free
Multiple Choice
Q 7Q 7
Match the major regions found on a tRNA molecule with their correct description.
A.acceptor stem
B.D loop
C.T loop
D.variable loop
E.anticodon loop
Section: 19.02
-This portion of tRNA contains a number of modified uracils.B
Free
Multiple Choice
Q 8Q 8
Match the major regions found on a tRNA molecule with their correct description.
A.acceptor stem
B.D loop
C.T loop
D.variable loop
E.anticodon loop
Section: 19.02
-This portion of tRNA base pairs with mRNA.E
Free
Multiple Choice
Q 9Q 9
Match the major regions found on a tRNA molecule with their correct description.
A.acceptor stem
B.D loop
C.T loop
D.variable loop
E.anticodon loop
Section: 19.02
-This portion of tRNA varies in length from 4 to 13 nucleotides.D
Free
Multiple Choice
Q 10Q 10
Match the major regions found on a tRNA molecule with their correct description.
A.acceptor stem
B.D loop
C.T loop
D.variable loop
E.anticodon loop
Section: 19.02
-This portion of tRNA has a terminal sequence of 5-CCA-3.A
Free
Multiple Choice
Q 11Q 11
Match the major regions found on a tRNA molecule with their correct description.
A.acceptor stem
B.D loop
C.T loop
D.variable loop
E.anticodon loop
Section: 19.02
-This portion of tRNA contains the sequence TC.C
Free
Multiple Choice
Q 12Q 12
Biochemical and genetic experiments have demonstrated that the _________ of tRNA are important for recognition by its cognate aminotransferase-tRNA synthetase.
A)D loop and T loop
B)T loop and variable loop
C)anticodon loop and T loop
D)acceptor stem and anticodon loop
E)variable loop and D loop
Free
Multiple Choice
Q 13Q 13
The crystal structure of the Thermus thermophilis 70S ribosome reveals that the binding sites for tRNA are composed primarily of ______________.
Free
Short Answer
Free
Short Answer
Free
Short Answer
Q 16Q 16
Spectinomycin and paromomycin are antibiotics that were used to help determine the ___________ and ___________ functions of the 30S ribosomal subunit.
Free
Short Answer
Q 17Q 17
The exit tunnel walls of the 50S ribosomal subunit are made of _______,which probably helps the hydrophobic side chains of the nascent polypeptide to slide through easily.
Free
Short Answer
Free
Short Answer
Q 19Q 19
The T loop of tRNA contains the modified nucleoside ____________,represented by the Greek letter .
Free
Short Answer
Free
Short Answer
Q 21Q 21
X-ray crystallography studies have shown that tRNAs interact with the 30S ribosomal subunit through their _________ and with the 50S ribosomal subunit through their __________.
Free
Short Answer
Free
Short Answer
Q 23Q 23
The antibiotic _____________ is thought to inhibit translocation by blocking pivoting of the ribosomal head region.
Free
Short Answer
Q 24Q 24
The antibiotic streptomycin appears to increase the error rate of translation by interfering with the initial codon-_______ recognition and with proofreading.
Free
Short Answer
Q 25Q 25
The crystal structure of the Thermus thermophilis ribosome revealed that the twelve contacts between the subunits are mostly mediated by ribosomal proteins.
Free
True False
Q 26Q 26
Upon binding to a ribosome,an aminoacyl-tRNA first enters in the A/T with its anticodon in the decoding site of the 30S particle and its acceptor stem still bound to EF-Tu.
Free
True False
Q 27Q 27
tRNAs contain a number of modified bases that have been shown to be necessary for tRNA function.
Free
True False
Q 28Q 28
In prokaryotes,transcription and translation are coupled and therefore polysomes can be found associated with active genes.
Free
True False
Q 29Q 29
There are two classes of aminoacyl-tRNA synthetases,each approaches the tRNA molecule from the same side.
Free
True False
Q 30Q 30
The sequence of the 16S rRNA can be used to determine evolutionary relatedness between organisms.
Free
True False