â¢ BETEL NUT (noun). The noun BETEL NUT has 1 sense: 1. seed of betel palm; chewed with leaves of the betel pepper and lime as a digestive stimulant and narcotic in southeastern Asia. Familiarity information: BETEL NUT used as a noun is very rare.eed of betel palm; chewed with leaves of the betel pepper and lime as a digestive stimulant and narcotic in southeastern Asia.
Proteins (/ËproÊËtiËnz/ or /ËproÊti.áµ»nz/) are large biomolecules, or macromolecules, consisting of one or more long chains of amino acid residues. Proteins perform a vast array of functions within organisms, including catalysing metabolic reactions, DNA replication, responding to stimuli, and transporting molecules from one location to another.
The usability of a particular protein by the body is termed its 'biological value'. In simple terms, this means how much of a protein can be fully digested and broken down into amino-acids. Eggs have the highest biological value -100. Other animal proteins such as fish and meat fall in the 70-90 range.