Interpretation:
To identify the incorrect statement concerning the first step of the degradation of the heme portion of hemoglobin.
Concept introduction:
In the body, red blood cells deliver oxygen and remove carbon dioxide from the body tissues. Mature red blood cells have hemoglobin which is responsible for the oxygen carrying ability of the red blood cells.
Hemoglobin is a heme protein present in the red blood cells. The protein part is called globin and the non-protein part is heme. Heme is the prosthetic group that contains 4 pyrrole groups bonded together and has an iron atom in the center. The structure of the heme group is:
Red blood cells are formed in the bone marrow. The primary site for a breakdown of red blood cells is spleen and the secondary site is liver. Breakdown of red blood cells involves the degradation of hemoglobin. The protein part (globin) of the hemoglobin is hydrolyzed to an amino acid, an iron atom of the heme is converted to ferritin which is an iron storage protein and the remaining tetrapyrrole carbon arrangement upon degradation forms bile pigments.
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Organic And Biological Chemistry
- Which of the following processes occurs within the cytosol of a cell? a. ketogenesis b. -oxidation pathway c. electron transport chain d. no correct responsearrow_forwardWhich of the following occurs in the second stage in the biochemical energy production process? a. electron transport chain b. citric acid cycle c. acetyl group formation d. no correct responsearrow_forwardIn the degradation of heme, the iron atom present is released and then a. eliminated from the body in the urine b. captured by the iron-storage protein ferritin c. captured by the B vitamin niacin d. no correct responsearrow_forward
- Which of the following pairings of enzyme type and enzyme function is incorrect? a. Lipase hydrolysis of ester linkages in a lipid b. Hydratase addition of water to a substrate c. Carboxylase removal of carbon dioxide from a substrate d. no correct responsearrow_forwardWhich of the following stages in the biochemical energy production process immediately precedes the citric acid cycle? a. digestion b. acetyl group formation c. electron transport chain d. no correct responsearrow_forwardWhich of the following statements concerning the nature of enzymes is incorrect? a. Most, but not all, enzymes are globular proteins. b. Some, but not all, enzymes are conjugated proteins. c. Most, but not all, enzymes are catalysts. d. no correct responsearrow_forward
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- Which of the following statements concerning the degradation of standard amino acid carbon skeletons is correct? a. Each type of carbon skeleton is degraded to a different product. b. All carbon skeletons are degraded to the same product. c. Each type of carbon skeleton is degraded by a different metabolic pathway. d. no correct responsearrow_forwardThe net yield of ATP for the complete oxidation of one molecule of glucose is a. 12 ATP b. 24 ATP c. 30 ATP d. no correct responsearrow_forwardWhich of the following statements about cofactors is incorrect? a. All conjugated enzymes contain cofactors. b. Metal ions can function as cofactors. c. Coenzyme is an alternate name for all cofactors. d. no correct responsearrow_forward
- General, Organic, and Biological ChemistryChemistryISBN:9781285853918Author:H. Stephen StokerPublisher:Cengage LearningOrganic And Biological ChemistryChemistryISBN:9781305081079Author:STOKER, H. Stephen (howard Stephen)Publisher:Cengage Learning,