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:

View Explanation

Log in for full answers

Similar Questions

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

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