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多选题 Proteins are large biological molecules consist of which of the following amino acids
学科：生物化学
时间：2023-06-18 06:52:44
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题目1多选题
2. The oxygen carrier of muscle is the globular protein myoglobin. Which of the following amino acids is highly likely to be localized within the interior of the moleculeA. ArginineB. Aspartic acidC. Glutamic acidD. ValineE. Lysine
题目2多选题
When using Biuret's test, which macromolecule will produce a positive reaction (colour change from blue to lilac)A. ProteinB. FatC. CarbohydrateD. amino acidE. all four
题目3多选题
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 probableA. AlanineB. GlycineC. HistidineD. LeucineE. Valine
题目4多选题
Select the one of the following statements that is NOT CORRECTA. Protein folding is assisted by intervention of specialized auxiliary proteins called chaperoneB. Protein folding tends to be modular, with areas of local secondary structure forming first, then coalescing into a molten globuleC. Protein folding is driven first and foremost by the thermodynamics of the water molecules surrounding the nascent polypeptideD. The formation of S-S bond in a mature protein is facilitated by the enzyme protein disulfide isomeraseE. Only a few unusual proteins, such as collagen, require posttranslational processing by partial proteolysis to attain their mature conformation
题目5多选题
Proteins are large biological molecules consist of which of the following amino acidsA. L-α-amino acidsB. D-α-amino acidsC. L-β-amino acidsD. D-β-amino acidsE. L- and D-β-amino acids
题目6多选题
How many amino acids are involved in making proteins in humansA. 5B. 20C. 35D. 64
题目7多选题
Consider the amino acid shown below. The configuration about which atom will determine whether the amino acid is in the D or L configuration?<img src="https://tihai-oss-cloud.itihey.com/img/1527a25e8b43d40320a7d14c46b952e9.jpg">A. 如图B. 如图C. 如图D. 如图
题目8多选题
Select the one of the following statements that is NOT CORRECTA. Ion-exchange chromatograph separates proteins based upon the sign and magnitude of their charge at a given PHB. Two-dimensional gel electrophoresis separates proteins first on the basis of their PI values and second on their charge to mass ratio using SDSC. Affinity chromatograph exploits the selectivity of protein-ligand interactions to isolate a specific protein from a complex mixtureD. Many recombinant proteins are expressed with an additional domain fused to their N-or C-terminals. One common component of these fusion domains is a ligand binding site designed expressly to facilitate purification by affinity chromatographyE. Tandem mass spectrometry can analyze peptides derived from complex protein mixtures without their prior separation
题目9多选题
The covalent bond formed between the carboxyl group of one amino acid and the amino group of another amino acid is called______A. Phosphoester bondB. phosphodiester bondC. Peptide bondD. Glycosidic bondE. Thioester bond
题目10多选题
Consider the following structure: <img src="https://tihai-oss-cloud.itihey.com/img/e2e64d0970bec1e27b887b85b33c6730.jpg">This structure is best described as which of the followingA. An amino acidB. A dipeptideC. A tripeptideD. A tetrapeptideE. A pentapeptide
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