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Amino acids, proteins and DNA (A-level only)
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Question 8
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Which is the main glutamic acid species present in an aqueous solution at
pH=1\text{pH} = 1
pH
=
1
?
A
CH2CH2COOH∣H−C−NH3+∣COOH \begin{array}{c} \text{CH}_2\text{CH}_2\text{COOH} \\ | \\ \text{H}-\text{C}-\text{NH}_3^+ \\ | \\ \text{COOH} \end{array}
CH
2
CH
2
COOH
∣
H
−
C
−
NH
3
+
∣
COOH
B
CH2CH2COOH∣H−C−NH2∣COOH \begin{array}{c} \text{CH}_2\text{CH}_2\text{COOH} \\ | \\ \text{H}-\text{C}-\text{NH}_2 \\ | \\ \text{COOH} \end{array}
CH
2
CH
2
COOH
∣
H
−
C
−
NH
2
∣
COOH
C
CH2CH2COO−∣H−C−NH3+∣COO− \begin{array}{c} \text{CH}_2\text{CH}_2\text{COO}^- \\ | \\ \text{H}-\text{C}-\text{NH}_3^+ \\ | \\ \text{COO}^- \end{array}
CH
2
CH
2
COO
−
∣
H
−
C
−
NH
3
+
∣
COO
−
D
CH2CH2COO−∣H−C−NH2∣COO− \begin{array}{c} \text{CH}_2\text{CH}_2\text{COO}^- \\ | \\ \text{H}-\text{C}-\text{NH}_2 \\ | \\ \text{COO}^- \end{array}
CH
2
CH
2
COO
−
∣
H
−
C
−
NH
2
∣
COO
−
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Amino acids, proteins and DNA (A-level only) Questions
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Amino acids, proteins and DNA (A-level only)
