medical MCQs – Page 188

Practise multiple-choice questions from medical for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

3741. As compared to permanent tooth , root formation in primary tooth______________?
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A. Take less time

B. Is complete when tooth erupts in oral cavity

C. Same time

D. Take more time

3742. The first macroscopic indication of morphologic development of primary incisors approximately at____________?
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A. 14 weeks in utero

B. 11 weeks in utero

C. 6 weeks in utero

D. 16 weeks in utero

3743. Lipid from tissue is carried to liver by_____________?
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A. LDL

B. Chylomicrons

C. HDL

D. VLDL

3744. Transport form of iron is______________?
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A. Apoferritin

B. Lactoferrin

C. Ferritin

D. Transferrin
3745. During the development of a tooth, sound coalescence of the lobes results in_____________?
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A. All of the above

B. Cusps

C. Fissures

D. Grooves
3746. Heme is converted to bilirubin mainly in_____________?
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A. Bone marrow

B. Kidney

C. Spleen

D. Liver

3747. The sigma subunit of prokaryotic RNA polymerase_______________?
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A. Is inhibited by a-amanitin

B. Is part of the core enzyme

C. Specifically recognizes the promoter site

D. Binds the antibiotic Rifampicin

3748. The decidous canine emerges______________?
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A. After first molar

B. Before lateral incisor

C. After second molar

D. Before first molar

3749. The most important buffer in RBC is____________?
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A. O2 Hb +Na hemoglobinate

B. H2CO3 + KHCO3

C. O2Hb +K hemoglobinate

D. H2CO3 +NAHCO3
3750. The precursor of cholesterol synthesis is________________?
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A. Pyruvate

B. Oxalo acetic acid

C. Acetyl CoA

D. Acetic acid

3751. Detoxification of drugs is controlled by_____________?
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A. Cytochrome C

B. Cytochrome P450

C. Cytochrome

D. Cytochrome A

3752. Ribosomes are usually associated with______________?
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A. Plasma membrane

B. Endoplasmic reticulum

C. Mitochondria

D. Nucleolus

3753. A six- year molar begins to calcify at______________?
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A. 1 years after birth

B. 3 years age

C. Six months IU

D. At birth
3754. Serum creatine kinase-3 (CK-3) is elevated in_______________?
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A. Myocardial infarction

B. Muscular dystrophy

C. Brain tumours

D. Alcoholic cirrhosis

3755. Normal serum calcium level is_______________?
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A. 9-11 mg/dl

B. 20-30 mg/dl

C. 4-6 mg/dl

D. 19-21 mg/dl

3756. The direction of enamel rods in decidous teeth is_____________?
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A. Inclined in an apical direction in the cervical third of crown

B. Inclined in an occlusal direction in the cervical third of crown

C. None of the above

D. Same as permanent teeth

3757. R-RNA is mainly produced mainly in___________?
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A. Endoplasmic reticulum

B. Nucleus

C. Nucleolus

D. Ribosome

3758. The key to occlusion is_______________?
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A. Maxillary primary second molar

B. Maxillary primary first molar

C. Maxillary permanent first molar

D. Maxillary permanent second molar

3759. All of the following muscles are elevators of the mandible except______________?
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A. Temporalis

B. Digastric

C. Medial pterygoid

D. Massetor

3760. In maple syrup urine disease the amino acids excreted in the urine are______________?
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A. All of the above

B. Valine

C. Leucine

D. Isoleucine