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28 Sep 2019
Which two amino acids are encoded by only a single codon each?
a. proline and glycine
b. cysteine and arginine
c. phenylalanine and isoleucine
d. tyrosine and proline
e. methionine and tryptophan
Which two amino acids are encoded by only a single codon each?
a. | proline and glycine | |
b. | cysteine and arginine | |
c. | phenylalanine and isoleucine | |
d. | tyrosine and proline | |
e. | methionine and tryptophan |
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Deanna HettingerLv2
28 Sep 2019
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Related questions
Using the information in the table below, enter the correct pH that should be used to separate the following three amino acids by electrophoresis:
(a) Glu, Lys, and Thr: pH=?
(b) His, Lys, and Arg: pH=?
------------------------------------------------------------------------------------------------------------------------------------------------------
Amino Acid | pKa of α-COOH | pKa of α-NH3+ | pKa of Side Chain | Isoelectric Point (pI) |
---|---|---|---|---|
Alanine | 2.35 | 9.87 | - | 6.11 |
Arginine | 2.01 | 9.04 | 12.48 | 10.76 |
Asparagine | 2.02 | 8.80 | - | 5.41 |
Aspartic acid | 2.10 | 9.82 | 3.86 | 2.98 |
Cysteine | 2.05 | 10.25 | 8.00 | 5.02 |
Glutamic acid | 2.10 | 9.47 | 4.07 | 3.08 |
Glutamine | 2.17 | 9.13 | - | 5.65 |
Glycine | 2.35 | 9.78 | - | 6.06 |
Histidine | 1.77 | 9.18 | 6.10 | 7.64 |
Isoleucine | 2.32 | 9.76 | - | 6.04 |
Leucine | 2.33 | 9.74 | - | 6.04 |
Lysine | 2.18 | 8.95 | 10.53 | 9.74 |
Methionine | 2.28 | 9.21 | - | 5.74 |
Phenylalanine | 2.58 | 9.24 | - | 5.91 |
Proline | 2.00 | 10.60 | - | 6.30 |
Serine | 2.21 | 9.15 | - | 5.68 |
Threonine | 2.09 | 9.10 | - | 5.60 |
Tryptophan | 2.38 | 9.39 | - | 5.88 |
Tyrosine | 2.20 | 9.11 | 10.07 | 5.63 |
Valine | 2.29 | 9.72 | - | 6.00 |