Both beta chains of haemoglobin are abnormal in_________________?

Related Mcqs:

1. Normal adult haemoglobin contains________________?

   A. One alpha chain and one beta chain
   B. One alpha chains and two beta chains
   C. One beta chains and two alpha chains
   D. Two alpha chains and two beta chains

2. Increased levels of haemoglobin A2 is characteristic of________________?

   A. Sickle cell trait
   B. b-thalassaemia crait
   C. Glucose-6 phosphate dehydrogenase deficiency
   D. a-Thalassamia

3. Iron is complexed in haemoglobin to_______________?

   A. Leucine
   B. Histidine
   C. Isoleucine
   D. Valine

4. False statement about haemoglobin structure________________?

   A. Hb has 2 polypeptide chains
   B. Iron is present in ferrous state
   C. Hb structurally similar to myoglobin
   D. Ferrous ions are in porphyrin rings

5. Heme in haemoglobin is____________?

   A. Between Helix C and D
   B. Surrounded by non polar environment
   C. Bonded to E7 histidine
   D. Protoporophyrin IX

6. Which of the following procedure is indicated to produce cross-linking in the polymerization of linear chains of acrylic_______________?

   A. Addition of grain refining agents
   B. Addition of difunctional monomers
   C. Increasing the amount of heat required for linear polymerization
   D. Incorporation of terminating agents

7. A child presents with infective skin lesions of the leg. Culture was done which showed gram positive cocci in chains and haemolytic colonies. Which of the following tests will best identify the organism ?

   A. Bile solubility
   B. Optochin sensitivity
   C. Bacitracin sensitivity
   D. Cataslase positive

8. Beta 2 agonist causes_______________?

   A. Mydriasis
   B. Contraction of urinary spinctors
   C. Vasoconstriction
   D. Bronchial muscle relaxation

9. The β (Beta) hemihydrate of gypsum requires more water to float its powder particles because______________?

   A. They are more regular in shape and dense
   B. They are more regular in shape and highly porous
   C. They are more irregular in shape and porous
   D. They are more dense and prismatic in shape

10. Mechanism of action of beta-lactam antibiotics would be______________?

    A. Inhibition of bacterial protein synthesis by binding to subunit of bacterial ribosomes
    B. Inhibition of cell wall peptidoglycan synthesis by competitive inhibition of transpetidases
    C. Reduced drug causes strand breaks in DNA
    D. Inhibition of DNA synthesis by inhibiting DNA-Dependent RNA polymerase