Competitive Exams: Medical Science MCQs (Practice-Test 125 of 135)

  1. Which one of the following hormones is involved in increased absorption of water from renal tubules?

    1. Vasopressin

    2. Cortisol

    3. Insulin

    4. Epinephrine

  2. Which one of the following pairs is NOT correctly matched? Acid-base disturbance/S. Bicarbonate, pCO2

      • Compensated metabolic acidosis
      • Bicarbonate, pCO2
      • Compensated respiratory alkalosis
      • Bicarbonate, pCO2
      • Compensated respiratory acidosis
      • Bicarbonate, pCO2
      • Compensated respiratory alkalosis
      • Bicarbonate, pCO2
  3. Intestinal mucosal cells release absorbed fats into blood stream in the form of

    1. miscelles

    2. chylomicrons

    3. HDL

    4. VLDL

  4. Which one of the following is the correct sequential order in which the given enzymes of Krebs cycle are formed after a molecule of acetyl CoA enters the cycle?

    1. Citrate, Oxaloacetate, Ketoglutarate

    2. Ketoglutarate, Oxaloacetate, Citrate

    3. Citrate, Ketoglutarate, Oxaloacetate

    4. Oxaloacetate, Ketoglutarate, Citrate

  5. Consider the following statements: DNA fingerprint is valuable in

    1. determining of blood group

    2. investigation of crime

    3. investigation of autoimmune

    4. determination of paternity.

    Of these statements

    1. 1 and 3 are correct

    2. 3 and 4 are correct

    3. 2 and 4 are correct

    4. 1 and 2 are correct

  6. Which one of the following is the function of small nuclear ribonucleoprotein particles (snRNP)?

    1. Initiation of protein synthesis

    2. Activation of amino acids

    3. Processing of RNA

    4. Replication of DNA

  7. Nonsense codons bring about

    1. Elongation of polypeptide chain

    2. pre-translational modification of protein

    3. initiation of protein synthesis

    4. termination of protein synthesis

  8. Chloramphenicol inhibits protein biosynthesis by

    1. Releasing the incomplete peptide material from ribosomes

    2. inhibiting the binding of mRNA to ribosomes

    3. inhibiting DNA polymerase

    4. inhibiting union of 60s and 40s lobes of ribosomes to form full ribosome

  9. Chemotaxis is mediated by

    1. histamine

    2. leukotriene B4 and C5a

    3. leukotriene C4 and C3a

    4. bradkykinin

  10. Consider the following events:

    1. Emigration

    2. Release of leukocyte products

    3. Margination and adhesion of leukocytes

    4. Phagocytosis and intracellular degradation

    The correct sequence of these cellular events in acute inflammation is

    1. 3, 1, 2, 4

    2. 1, 3, 2, 4

    3. 3, 1, 4, 2

  11. Which one of the following is very important mediator of the systemic effects of inflammation?

    1. Gamma interferon

    2. Beta tumour growth factor (TGF-β)

    3. Interleukin-1 (IL-1)

    4. Inteleukin-2 (IL-2)

  12. The best example of a proto-oncogene activated by point mutation is

    1. ras

    2. N-myc

    3. L-myc

    4. abl

  13. Philadelphia chromosome is an example of

    1. balanced translocation

    2. deletion

    3. non-dysjunction

    4. duplication

  14. DNA probe analysis is of great value in the identification of gene in all of the following neoplasms EXCEPT

    1. Neuroblastoma

    2. Breast cencer

    3. Lymphomas

    4. Gliomas

  15. Human papilloma virus (HPV) type 30, 40 causes

    1. laryngeal cancer

    2. carcinoma cervix

    3. skin cancer

    4. oral cancer