A: cysteine
B: histidine
C: citrulline
D: arginine
E: lysine
举一反三
- Which one of the following amino acids is NOT contained in the<br/>protein? () A: Cystine B: Arginine C: Lysine D: Citrulline
- Which of the following amino acids doesn’t belong to essential amino acids?? Methionine|Isoleucine|Valine|Cysteine
- In each type of protein, the amino acids are present in a unique order, called the _______________, which is exactly the same from one molecule of that protein to the next.
- Which one of the following amino acids in the protein does NOT have<br/>its genetic codon? ( ) A: Methionine B: Hydroxyproline C: Tryptophan D: Glutamine
- Individuals with cirrhosis frequently display elevated levels of amino acids in the blood. The source of these amino acids is predominantly which one of the following A: Red blood cell turnove B: Liver protein turnove C: Enterocyte degradation and turnove D: Muscle protein turnove E: Plasma protein turnove
内容
- 0
The primary structure of a food protein molecule refers to a linear sequence of amino acids connected by hydrogen bonding.
- 1
Proteins are large biological molecules consist of which of the following amino acids?: D-α-amino acids|D-β-amino acids|L- and D-β-amino acids|L-α-amino acids|L-β-amino acids
- 2
The final products of digestion are ? A: fatty acids, starch, glucose B: protein, amino acids, glucose C: protein, fat, carbohydrate D: glucose, amino acids, fatty acids
- 3
The photoreceptor protein rhodopsin, which is the light-sensitive protein made by the rod cells in the retina, detects light by means of a small molecule, ________, which is attached to the protein by a covalent bond to a lysine side chain.
- 4
Found in the chromatin of all eukaryotic cells, histones have molecular weights between 11,000 and 21,000 and are very rich in the basic amino acids arginine and lysine which together make up about _____ of all the amino acid residues. A: 1/6 B: 1/5 C: 1/4 D: 1/3