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Amino acids behave like salts rather tha...

Amino acids behave like salts rather than simple amines or carboxylic acids. Explain.

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**Step-by-Step Solution:** 1. **Understanding the Structure of Amino Acids:** - Amino acids have a general structure that includes an amino group (-NH2), a carboxylic acid group (-COOH), and a variable R group (side chain) that determines the specific properties of each amino acid. 2. **Acidic and Basic Properties:** - The carboxylic acid group (-COOH) can donate a proton (H+), which gives it acidic properties. When it loses a proton, it forms a negatively charged carboxylate ion (RCOO⁻). - The amino group (-NH2) has a lone pair of electrons on the nitrogen atom, allowing it to accept a proton (H+). When it accepts a proton, it becomes positively charged (NH3⁺). ...
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Explain the following : (i) Amino acids behave like salts rather than simple amines or carboxylic acids. (ii) The two strands of DNA are complementary to each other.

Amino acids behave like salts rather than simple amines or carboxylic acids. This behavior is due to the presence of both acidic (COOH) and basic (-NH_(2)) group in the same molecule. In aqueous solution, the carboxyl group can lose a proton and amino group can accept a proton, giving rise to a dipolar lon known as Zwitter ion. Zwitter ion exists.

Knowledge Check

  • The melting points and solubility in water of amino acids are generally higher than that of the corresponding halo acids. Explain.

    A
    amino acids exist as zwitter ions resulting in strong dipole-dipole attraction
    B
    amino acids are optically active
    C
    due to higher molecular mass of -`NH_(2)` group molecular mass of amino acids is higher
    D
    they interact with water more than halo-acids and have salt like structure .

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    An amino acid is

    Carboxylic acid (A) is:

    Most simple amino acid is

    Assertion : Alpha (alpha)- amino acids exist as internal salt in solution as they have amino and carboxylic acid groups in near vicinity. Reason :H^(+) ion given by carboyxylic group (-COOH) is captured by amino group (-NH_(2)) having lone pair of electrons.

    Account for acidic nature of carboxylic acids.

    The melting points and solubility in water of amino acids are generally higher than that of the corresponding halo acids. Explain.

    Carboxylic acids containing an amino group (-NH_(2)) as a substituent are called amino acids. When this amino group substitution is at alpha position with respect to carboxylic group, the aminoacid is called alpha -amino acid. The aminoacids with two carboxylic acids are called acidic amino acids whereas aminoacids with two amino group are called basic amino acids Amino acids show amphoteric character. Ali chiral natural amino acids exist in L-form. : Each of the following represent natural alanine (an amino acid) except

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