An insulin molecule in circulating in your bloodstream consists of:

Question

BlackTom AI · Accepted Answer

The question asks: 'An insulin molecule in circulating in your bloodstream consists of:' and provides an answer that reads 'two chains of amino acids linked together by disulfide bonds', but no answer options are supplied for evaluation.

Given the absence of multiple-choice options to analyze, I will first contextualize the structure of insulin to illuminate why the listed statement is accurate.

Insulin is a peptide hormone composed of two polypeptide chains, known as the A-chain and the B-chain. These chains are held together by disulfide bonds (covalent linkages between cysteine residues), forming the mature, circulating hormone. The two-chain arrangement arises from the processing of a single preproinsulin molecule that is cleaved to proinsulin and finally into the two-chain insulin with a connecting C-peptide that is removed during maturation.

If there were alternative options, they might include statements such as: a) insulin is a single-chain peptide with no disulfide bonds; b) insulin consists of three polypeptide chains; c) insulin is not a peptide but a steroid hormone; d) insulin is active only within pancreatic tissue and not in circulation. Each of these would be inaccurate for the following reasons: a) insulin is not single-chain and has disulfide bonds; b) insulin has two chains, not three; c) insulin is indeed a peptide hormone, not a steroid; d) insulin is secreted by pancreatic beta cells and acts throughout the circulation by binding to receptors on target tissues.

In summary, the statement that an insulin molecule circulating in the bloodstream consists of two chains of amino acids linked together by disulfide bonds accurately reflects the well-established structural biology of insulin. The lack of provided answer options prevents a direct option-by-option analysis, but the core factual claim about insulin’s two-chain structure with disulfide linkages is correct.

BME 3 Treating Diabete... Week 8 Recombinant DNA and Production of Insulin

An insulin molecule in circulating in your bloodstream consists of:

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BME 3 Treating Diabete... Week 8 Recombinant DNA and Production of Insulin

An insulin molecule in circulating in your bloodstream consists of:

查看解析

登录即可查看完整答案

类似问题

Question at position 25 A missense mutation might be affected what level of protein structure?All levels might be affected by a single amino acid substitutionPrimary structure onlyQuaternary structure onlySecondary structure onlyTertiary structure onlyClear my selection

Question at position 22 What level(s) of protein structure could be affected by a nucleotide substitution that results in an amino acid change in a polypeptide?quaternary structureprimary structuretertiary structureThere will be no structural changes.secondary structure

The interiors of globular proteins tend to be enriched for ______________ aminoacids while the protein surface regions near the aqueous environment tend to be _________________________

Question at position 22 Assume that a mutation results in an amino acid substitution in the translated polypeptide. What level of protein structure is definitely affected as a result? quaternaryprimary and tertiarytertiaryprimary and secondaryall levels of protein structureprimary

Question at position 1 What level(s) of protein structure could be affected by a nucleotide substitution that results in an amino acid change in a polypeptide?quaternary structureprimary structureThere will be no structural changes.tertiary structuresecondary structure

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The interiors of globular proteins tend to be enriched for aminoacids while the protein surface regions near the aqueous environment tend to be ___________