Concept explainers
(a)
Interpretation: To identify whether aminopeptidase is a hormone, a digestive enzyme or neither a hormone nor a digestive enzyme.
Concept introduction: Enzymes are specialized proteins that act as biological catalysts. Enzymes accelerate the biochemical reactions to produce the substances that are needed for cells for their proper functioning. The enzymes are very specific to their action.
Hormones are the chemical signals and these are produced by specialized cells. Hormones are secreted into the blood stream and carried to a target tissue where they signal the targeted tissue or organ to perform their specified function.
(b)
Interpretation: To identify whether pepsin is a hormone, a digestive enzyme or neither a hormone nor a digestive enzyme.
Concept introduction: Enzymes are specialized proteins that act as biological catalysts. Enzymes accelerate the biochemical reactions to produce the substances that are needed for cells for their proper functioning. The enzymes are very specific to their action.
Hormones are the chemical signals and these are produced by specialized cells. Hormones are secreted into the blood stream and carried to a target tissue where they signal the targeted tissue or organ to perform their specified function.
(c)
Interpretation: To identify whether
Concept introduction: Enzymes are specialized proteins that act as biological catalysts. Enzymes accelerate the biochemical reactions to produce the substances that are needed for cells for their proper functioning. The enzymes are very specific to their action.
Hormones are the chemical signals and these are produced by specialized cells. Hormones are secreted into the blood stream and carried to a target tissue where they signal the targeted tissue or organ to perform their specified function.
(d)
Interpretation: To identify whether secretin is a hormone, a digestive enzyme or neither a hormone nor a digestive enzyme.
Concept introduction: Enzymes are specialized proteins that act as biological catalysts. Enzymes accelerate the biochemical reactions to produce the substances that are needed for cells for their proper functioning. The enzymes are very specific to their action.
Hormones are the chemical signals and these are produced by specialized cells. Hormones are secreted into the blood stream and carried to a target tissue where they signal the targeted tissue or organ to perform their specified function.
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Chapter 26 Solutions
EBK GENERAL, ORGANIC, AND BIOLOGICAL CH
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- Which one is a purine? OTarrow_forwardEnalapril is an anti-hypertension “pro-drug” (i.e., a drug precursor) that isinactive until the ethyl ester (arrow in figure) is hydrolyzed by esterases present in blood plasma. The active drug is the dicarboxylic acid (“enalaprilat”) that results from this hydrolysis reaction.(a) Enalapril is administered in pill form, but enalaprilat must be administered intravenously. Why do you suppose enalapril works as a pill but enalaprilat does not? (b) Enalaprilat is a competitive inhibitor of the angiotensin-convertingenzyme (ACE), which cleaves the blood-pressure regulating peptideangiotensin I. ACE has a KM = 52 μM for angiotensin I, which is presentin plasma at a concentration of 75 μM. When enalaprilat is presentat 2.4 nM, the activity of ACE in plasma is 10% of its uninhibitedactivity. What is the value of K1 for enalaprilat?arrow_forwardIf a commercially available insulin preparation contains 1 ppm of proinsulin, how many micrograms of proinsulin would be contained in a 10-mL vial of insulin?arrow_forward
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