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All proteins are made up of alpha-amino ...

All proteins are made up of `alpha`-amino acids which act as the building blocks. `alpha`-amino acids that are synthesised in the body, are known as non-essential `alpha`-amino acids while the one which the body fails to synthesise, are called essential `alpha`-amino acids. All of them exist as dipolar ions also known as Zwitterions. For all the `alpha`-amino acids, there is a certain pH of the medium known as isoelectric point at which the dipolar ions behave as electrically neutral species. In acidic medium, the ion migrates towards cathos while in basic medium, it migrates towards anode on passing electric current.
Which of the following is not an essential `alpha`-amino acid ?

A

Lysine

B

Phenylalanine

C

Valine

D

Glycine

Text Solution

Verified by Experts

The correct Answer is:
D
Glycine is synthesised by the body.
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All proteins are made up of alpha -amino acids which act as the building blocks. alpha -amino acids that are synthesised in the body, are known as non-essential alpha -amino acids while the one which the body fails to synthesise, are called essential alpha -amino acids. All of them exist as dipolar ions also known as Zwitterions. For all the alpha -amino acids, there is a certain pH of the medium known as isoelectric point at which the dipolar ions behave as electrically neutral species. In acidic medium, the ion migrates towards cathos while in basic medium, it migrates towards anode on passing electric current. The isoelectric point of an amino acid is

alpha- amino acids are

Which one is not an essential amino acid ?

Which of the following is not an alpha -amino acid?

Amino acids not synthesised in our body are

What are non essential amino acids?

Knowledge Check

  • All proteins are made up of alpha -amino acids which act as the building blocks. alpha -amino acids that are synthesised in the body, are known as non-essential alpha -amino acids while the one which the body fails to synthesise, are called essential alpha -amino acids. All of them exist as dipolar ions also known as Zwitterions. For all the alpha -amino acids, there is a certain pH of the medium known as isoelectric point at which the dipolar ions behave as electrically neutral species. In acidic medium, the ion migrates towards cathos while in basic medium, it migrates towards anode on passing electric current. Which is basic amino acid ?

    A
    Aspartic acid
    B
    Histidene
    C
    Valine
    D
    Leucine

  • All proteins are made up of alpha -amino acids which act as the building blocks. alpha -amino acids that are synthesised in the body, are known as non-essential alpha -amino acids while the one which the body fails to synthesise, are called essential alpha -amino acids. All of them exist as dipolar ions also known as Zwitterions. For all the alpha -amino acids, there is a certain pH of the medium known as isoelectric point at which the dipolar ions behave as electrically neutral species. In acidic medium, the ion migrates towards cathos while in basic medium, it migrates towards anode on passing electric current. The isoelectric point of an amino acid is

    A
    the pH at which it exists in basic form
    B
    the pH at which it exists in acidic form
    C
    the pH at which it exists in zwitterion form
    D
    the pH equal to its Pka.

  • alpha- amino acids are

    A
    acidic due to `-COOH` group and basic due to `-NH_(2)` group
    B
    acidic due to `-NH_(3)^(+)` group and basic due to `-COO^(-)` group.
    C
    neither acidic nor basic
    D
    none is true.