A: A total of 20 different codons represent the genetic code;
B: Different codons may encode the same amino acid;
C: The third bit of the codon has variability.
D: Each nucleotide triplet encodes an amino acid;
举一反三
- The three nucleotide group that codes for one amino acid is called A: anti-codon B: RNA C: ribonucleic acid D: codon
- Which of these three-letter codes is correct regarding the amino acid isoleucine?
- What about inserting a base into the coding region of a gene？ A: No impact B: It will change all amino acid sequences of the protein downstream of the insertion point C: Depending on the insertion point, it may have different effects on the protein D: An amino acid will be inserted into the protein sequence E: Three amino acids will be inserted into the protein sequence
- Which of the following amino acid can not produce one carbon unit?
- One can predict the amino acid sequence of a protein from the nucleotide sequence of its gene.
内容
- 0
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
- 1
Many proteins can be grouped into protein families, in which each family member has an amino acid sequence and a three-dimensional conformation that closely ________ those of the other family members.
- 2
According to the scientists, life came from ___________. A: combination of energy and biochemical materials B: combination of nucleic acid and amino molecules C: nucleic acid molecules D: amino acid molecules
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Genes with high expression levels are more likely to use ________. A: Prefer codons B: Rare codons C: Start codon D: Stop codon
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which of the following is irrelevant to protein bioavailability( ) A: amino acid composition B: protein conformation C: Lignin and proteases D: Millard reactions