The validation of the given statement that the amino acid attachment site involves a hairpin loop has to be stated. Concept introduction: 2-D structure of tRNA is “clover leaf” like, a shape produced by the molecule’s folding and twisting into regions of parallel strands and regions of hairpin loops.
The validation of the given statement that the amino acid attachment site involves a hairpin loop has to be stated. Concept introduction: 2-D structure of tRNA is “clover leaf” like, a shape produced by the molecule’s folding and twisting into regions of parallel strands and regions of hairpin loops.
Solution Summary: The author explains that 2-D structure of tRNA is "clover leaf" like, a shape produced by the molecule's folding and twisting into regions of parallel strands.
Definition Definition A complex molecule that makes up a fundamental unit of a DNA or RNA molecule. Nucleotides are composed of a sugar, a nitrogenous base, and a phosphoric acid.
Chapter 22, Problem 22.114EP
(a)
Interpretation Introduction
Interpretation: The validation of the given statement that the amino acid attachment site involves a hairpin loop has to be stated.
Concept introduction: 2-D structure of tRNA is “clover leaf” like, a shape produced by the molecule’s folding and twisting into regions of parallel strands and regions of hairpin loops.
(b)
Interpretation Introduction
Interpretation: The validation of the given statement that an amino acid covalently bonded to its attachment site has to be stated.
Concept introduction: 2-D structure of tRNA is “clover leaf” like, a shape produced by the molecule’s folding and twisting into regions of parallel strands and regions of hairpin loops. The 3' end of the open part of the cloverleaf structure is covalently bonded to the tRNA.
(c)
Interpretation Introduction
Interpretation: The validation of the given statement that three hairpin loops are present in a tRNA molecule has to be stated.
Concept introduction: 2-D structure of tRNA is “clover leaf” like, a shape produced by the molecule’s folding and twisting into regions of parallel strands and regions of hairpin loops. The 3' end of the open part of the cloverleaf structure is covalently bonded to the tRNA.
(d)
Interpretation Introduction
Interpretation: The validation of the given statement that the amino acid hydrogen bonds to its attachments site has to be stated.
Concept introduction: 2-D structure of tRNA is “clover leaf” like, a shape produced by the molecule’s folding and twisting into regions of parallel strands and regions of hairpin loops. The carboxyl group of the amino acid reacts with the 3' OH group on the terminal nucleotide.
Part VII. The H-NMR of a compound with molecular formula C5 H 10 O2 is given below.
Find the following:
(a) The no. of protons corresponding to each signal in the spectra
(6) Give the structure of the compound and assign the signals to each
proton in the compound.
a
70.2
Integration Values
C5H10O2
b
47.7
C
46.5
d
69.5
3.6 3.5
3.4 3.3 3.2 3.1 3.0
2.9 2.8
2.7
2.6 2.5
2.4 2.3 2.2 2.1 2.0
Chemical Shift (ppm)
1.9
1.8
1.7 1.6
1.5
1.4 1.3 1.2
1.1 1.0
0.9 0.8
Part 111. 1 H-NMR spectrum of a compound with integration values in red is given below.
Answer the following:
(a) write the signals in the 'H-NMR spectrum to the corresponding protons on the structure
of the molecule below.
(b) Identify the theoretical multiplicities for each proton in the compound. Also give the possible.
complex splitting patterns assuming J values are not similar.
там
Br
22
2
3
6
4 7.2 7.0 6.8 6.6 6.4 6.2 6.0 5.8 5.6 5.4 5.2 5.0 4.8 4.6 4.4 4.2 4.0 3.8 3.6 3.4 3.2 3.0 2.8 2.6 2.4 2.2 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0
Chemical Shift (ppm)
ra.
Br
2
3
6
6
2.5
2.4
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
Chemical Shift (ppm)
2
2
Br
7.3
7.2
7.1
7.0 6.9
6.7 6.6 6.5
6.4
6.3
6.2
6.1
6.0
Chemical Shift (ppm)
5.9
5.8 5.7
5.5 5.4 5.3 5.2
5.0 4.9
1600°
1538°C
1493°C
In the diagram, the letter L indicates
that it is a liquid. Indicate its
components in the upper region
where only L is indicated.
The
iron-iron carbide phase
diagram.
Temperature (°C)
1400
8
1394°C
y+L
1200
2.14
y, Austenite
10000
912°C
800a
0.76
0.022
600
400
(Fe)
a, Ferrite
Composition (at% C)
15
1147°C
a + Fe3C
2
3
Composition (wt% C)
L
2500
4.30
2000
y + Fe3C
727°C
1500
Cementite (Fe3C)
1000
4
5
6
6.70
Temperature (°F)
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