Which of the following statements is true about hemoglobin? a.hemoglobin b. Each hemoglobin molecule is made up of one alpha and one beta chain polypeptide. C. All that is needed to bind oxygen is a molecule of heme. D. Each hemoglobin molecule can carry four oxygen molecules.
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Which of the following statements is true about hemoglobin?
a.hemoglobin
b. Each hemoglobin molecule is made up of one alpha and one beta chain polypeptide.
C. All that is needed to bind oxygen is a molecule of heme.
D. Each hemoglobin molecule can carry four oxygen molecules.
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- Which of the following situations occurs if a person's blood becomes more alkaline? A. Hemoglobin molecules retain less oxygen per heme group under alkaline conditions than they do at neutral pH or under acidic conditions. B. Hemoglobin molecules give up oxygen more readily under alkaline conditions than they do under neutral pH or under acidic conditions. C. Hemoglobin molecules change shape and begin to lose oxygen molecules. D. Hemoglobin molecules retain oxygen more readily under alkaline conditions than they do at neutral pH or under acidic conditions. E. There is no change in hemoglobin's oxygen-binding affinity under alkaline conditions when compared to blood at neutral pH or under acidic conditions.Which of the following statements is INCORRECT about how the components of hemoglobin are recycled? a. Iron ions are either stored in a phagocytic cell or circulate in the blood, bound to transferrin (a plasma protein). b. Each heme is stripped of its iron and converted to bilirubin, then excreted in bile. c. The alpha and beta chains are released into the bloodstream for use by other cells. d. Hemoglobin can be recycled only if phagocytized by macrophages.Which of the following describe(s) a characteristic or function of hemoglobin?a. Hemoglobin consists of four chains of amino acids.b. A hemoglobin molecule contains four iron ions to carry oxygen.c. In addition to transporting oxygen, hemoglobin molecules carry carbon dioxide and hydrogen ions.d. Hemoglobin is a protein found in all formed elements.e. There are four hemoglobin molecules in each red blood cell.
- Match the following with its function: plasma protein that creates osmotic pressure that prevents fluids from leaking out of blood vessels (prevents edema) A. albumin B. fibrinogen plasma protein that helps cause blood clotting C. platelets v Formed element that causes blood clotting. D. white blood cells Formed element important in the immune E. red blood cells system. F. hemoglobin v formed element that carries oxygen v protein that binds to oxygenWhich of the following is true about the proximal histidine of hemoglobin? A. It forms a hydrogen bond with bound oxygen. B. It is bonded to the Fe2+ atom coordinated by heme C. It binds oxygen D. It is not consumed in myoglobinWhich statement is true for the heme group present myoglobin: a. Oxygen binding to heme group is influenced by serine residues within proteins’ sequences. b. Oxygen binding to heme can become irreversible as a result of interaction with certain protein residues. c. Oxygen reversibly binds to the heme prostetic group and this binding is influenced by histidine residues within the myoglobin sequence. d. The heme group dissociates from Mb after oxygen is released.
- Which of the following statements are true of red blood cells (RBCs)? (Read carefully and select all of the correct statements.) A. The protein hemoglobin contains the mineral iron. B. The life span of an RBC is about 60 days. C. Hemoglobin that has given up its oxygen is called debonded hemoglobin. D.RBCs have a life span of 120 days. E. The RBC is also know as erythrocyte. OF. The RBC is also known as thrombocytes. Type here to search D 5 CENWhich of the following is true about the T (tense) -->R (relaxed) transition of hemoglobin? A. The T state of hemoglobin binds oxygen with a higher affinity than the R state. B. The binding of O2 to a subunit T state can cause the transition of other subunits to the R state. C. The T state has a narrower pocket between b subunits than does the R state. D. When hemoglobin undergoes the T--> R transition, the structures of the individual subunits change dramatically.Which of the following is incorrect about 2,3-bisphosphoglycerate (BPG)? It is highly (-) charged b. It prevents binding of O₂ to hemoglobin Oc. It binds only to the relaxed (oxy) conformation of hemoglobin Od. It binds in the space between the four subunits of hemoglobin a.
- People suffering with sickle cell anemia have a structural defect in hemoglobin (HB). The major reason for this structural change is mutation of glutamic acid to valine. This leads to a Exposure of polar amino acids, leading to disintegration of hemoglobin. b Burying of polar amino acids, leading to disintegration of hemoglobin. c Exposure of non-polar amino acids leading to long fiber formation. d Burying of non-polar amino acids thereby increasing hydrophobic interactions and formation of long fibres.Which molecule has the greatest ability to stabilize the deoxy state of hemoglobin? Select one: a. all have equal ability b. ВPG C. CO d. H e. Co2Bilirubin results from the degradation of: Select one: O a. Globin O b. Iron O C. Mitochondria O d. Non-iron heme