举一反三
- 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
- Proteins are typically made up of chains of several hundred amino acids, whose sequence is always presented starting with the N-terminus reading from left to right.
- The covalent bond between two adjacent amino acids in a protein chain is called a ___________; the chain of amino acids is also known as a polypeptide.
- Proteins are natural polymers of amino acids with primary structure, secondary structure, tertiary structure and quaternary structure.
- The primary structure of proteins consists of a sequence of amino acids linked together by peptide bonds and includes any disulfide bonds.
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3.A 6-year-old African American girl with speech delay is found to have a large, abnormal peak when blood amino acids are measured. The abnormal amino acid migrates toward the cathode, indicating a positively charged side group in addition to its carboxyl and amino groups. Which of the following amino acids is most probable?
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The three nucleotide group that codes for one amino acid is called A: anti-codon B: RNA C: ribonucleic acid D: codon
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The primary manner for the deamination of amino acids in muscle involves ( ). A: purine nucleotide cycle B: oxidative deamination of glutarate C: transamination D: ornithine cycle E: conjunction of transamination and purine nucleotide cycle F: conjunction of transamination and oxidative deamination
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For a typical protein length of 300 amino acids, more than ______ different polypeptide chains could theoretically be made
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When a protein is completely hydrolyzed will the further analyse: ( ) A: Only detect amino acids in S conformation B: Often detect other molecules besides amino acids C: Never detect more than 20 standard amino acids D: Never detect fewer than 20 standard amino acids E: Only detect the 20 standard amino acids