Question 1
The following amino acid side chain is ________.
—CH—CH
3 |
CH
3◦ basic
◦ hydrophobic
◦ hydrophilic
◦ polar
◦ acidic
Question 2
The R group for serine is -CH
2-OH. In the ionized form, serine has the structural formula ________.
◦
CH
2—OH
H
3![](data:image/png;base64, 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)
—
![](data:image/png;base64, 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)
H—COO
-◦
CH
2—OH
H
3![](data:image/png;base64, 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)
—
![](data:image/png;base64, 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)
H—COOH
◦
CH
2—OH
NH
2—
![](data:image/png;base64, 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)
H—COO
-◦
CH
2—O
- H
3![](data:image/png;base64, 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)
—
![](data:image/png;base64, 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)
H—COOH
◦
CH
2—OH
NH
2—
![](data:image/png;base64, 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)
H—COOH