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biochemistry -Proteins
Macronutrients
10
Science
Graduate
12/29/2008

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Cards

Term

What is proteins role in nutrition?

Definition

Essential nutritionally because of their constituent amino acids>synthesize different proteins and nitrogen-containing molecules. 

Term
What are the different reactions enzymes catalyze?
Definition
Hydrolases, Isomerases, Ligases, oxidoreductases, transferases
Term
Amino acid derived hormones are...
Definition

considered messengers that have important roles in metabolism and nutriton. Ex. Tyrosine-thyroid hormones and catecholamines, Tryptophan-melatonin (180)

Term

What proteins have a structural role in the body?

Definition
Contractile, fibrous and globular
Term
What are immunoproteins role in the body?
Definition
They function by binding to antigens and inactivating them. (five major classes - Y-shaped - four polypeptide chains)
Term
What are transporter proteins role?
Definition

Combine with vitamins, minerals and other substances to provide a means of carring those substances in the blood, or into cells, out of cells or within cells. (some important transporters are: albumin, transthyretin, transferrin, ceruloplasmin, lipoproteins.

Term
Function of buffers?
Definition
Help regulate acid-base balance. Ameliorates a change in pH that would otherwise occur in response to addition of alkali or acid solution.
Term

Proteins role in fluid balance?

Definition
Proteins in the blood and cells helps attract water and contribute to osmotic pressure.
Term
What is the primary structure of a protein?
Definition
Sequence of and strong covalent bond among amino acids that occur as the polypeptide chain is synthesized on the ribosomes
Term
What are the types of secondary structures?
Definition

alpha-Helix, beta-Pleated sheets and random coil (183,84)

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