6 Questions
In transamination reactions, a-ketoglutarate acts as an amino group donor.
False
Aminotransferases are only active in the cytoplasm.
False
The enzyme involved in transamination reactions is dependent on PLP.
True
The structure of an amino acid always includes a keto group.
False
Transamination reactions involve a one-way conversion of amino acids to keto acids.
False
GLU is an amino acid involved in transamination reactions.
True
Study Notes
Amino Acid Metabolism
- Involves both catabolism (degradation) and anabolism (synthesis) of amino acids
- Excess amino acids are diverted towards energy generation through transamination
Transamination
- Amino acids undergo transamination to concentrate nitrogen in glutamate
- Involves the transfer of an amino group from an amino acid to an alpha-keto acid
- Aminotransferases are enzymes that catalyze transamination reactions
- Aminotransferases are active in both the cytoplasm and mitochondria
- Alpha-ketoglutarate acts as the amino group acceptor in all transamination reactions
Structure of Proteins
- Made up of chains of amino acids
- Classified based on the number of amino acids in a chain:
- Peptides: fewer than 50 amino acids
- Dipeptides: 2 amino acids
- Tripeptides: 3 amino acids
- Polypeptides: more than 10 amino acids
- Proteins: more than 50 amino acids (typically 100 to 10,000 amino acids linked together)
- Chains are synthesized based on specific bodily DNA
Amino Acids
- Composed of carbon, hydrogen, oxygen, and nitrogen
- Contain an NH2 group
- Definition: organic acids that contain an NH2 group
This quiz explores the processes of amino acid metabolism, including transamination and the role of glutamate in concentrating nitrogen. It covers the breakdown and synthesis of amino acids, as well as their diversion towards energy generation. Test your knowledge of amino acid metabolism and its importance in the body.
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