MCQs

Medical MCQs with Explanations

Read every question, see the correct answer, and understand the explanation at your own pace. Study mode has no timer and no negative marking.

75%

3,820 of 5,101MCQs reviewed

Study Mode — explanations are always visiblePrefer a timed quiz? Start test

3821MedicalMedium

The decreased phosphate level seen in hyper parathyroidism is due to ________?

ADecreased renal phosphate absorption

BDecreased intestinal phosphate absorption

CIncreased calcium excretion

DIncreased loss of phosphate in urine

Correct answer

A. Decreased renal phosphate absorption

Explanation

The correct answer is Decreased renal phosphate absorption.

3822MedicalMedium

A union of the roots of adjacent teeth through the cementum is referred to as________?

AConcrescence

BFusion

CNone of the above

DGemination

Correct answer

A. Concrescence

Explanation

The correct answer is Concrescence.

3823MedicalMedium

True about prions________?

APhase in which virus cannot be demonstrated in host cell

BViruses which are genetically deficient

CComposed largely proteins without any nucleic acid

DViral components may be synthesized but maturation & assembling is defective

Correct answer

C. Composed largely proteins without any nucleic acid

Explanation

The correct answer is Composed largely proteins without any nucleic acid.

3824MedicalMedium

The function of IgD is________?

AAntigen recognition by B cells

BLocalization protection in external secretion

CReagin activity

DCompliment activation

Correct answer

A. Antigen recognition by B cells

Explanation

The correct answer is Antigen recognition by B cells.

3825MedicalMedium

Which of the following statement is correct________?

AAll of the above

BThe apatite crystals are parallel to bodies and deviate 65° from the tails

CThe bodies of rods are near occlusal and incisal surfaces, where as the tails point cervically

DIn cross sections enamel rods appear hexagonal and resembles fish scales

Correct answer

A. All of the above

Explanation

The correct answer is All of the above.

3826MedicalMedium

Neonatal lines are found in all of the following except________?

ADentin of permanent mandibular incisors

BEnamel of permanent canines

CEnamel of primary incisors

DEnamel and dentin of permanent first molars

Correct answer

B. Enamel of permanent canines

Explanation

The correct answer is Enamel of permanent canines.

3827MedicalMedium

Reduction in the fusion temperature of dental gold casting alloys is caused by presence of________?

ACopper

BPlatinum

CSilver

DGold

Correct answer

A. Copper

Explanation

The correct answer is Copper.

3828MedicalMedium

Alginate impression material is similar to Agar-agar impression material in the following respect________?

ABoth can be re-used for fresh impressions

BMixing time is increased to reduce the setting time

CGelation increase in both on increase in temperature

DDeformation during removal of impression occurs due to distortion of gel fibers

Correct answer

D. Deformation during removal of impression occurs due to distortion of gel fibers

Explanation

The correct answer is Deformation during removal of impression occurs due to distortion of gel fibers.

3829MedicalMedium

The following statements about verapamil are true except________?

AIt can cause constipation

BIt is less potent as a coronary vasodilator

CIt does not produce reflex tachycardia

DIt is contraindicated in patients with supraventicular tachycardia

Correct answer

D. It is contraindicated in patients with supraventicular tachycardia

Explanation

The correct answer is It is contraindicated in patients with supraventicular tachycardia.

3830MedicalMedium

Biological activity of tocopherols has been attributed, in part to their actions as________?

AAnticoagulants

BAntidotes for selenium poisoning

CAntioxidant

DProvitamin

Correct answer

D. Provitamin

Explanation

The correct answer is Provitamin.

True about prions________?

APhase in which virus cannot be demonstrated in host cell

BViruses which are genetically deficient

CComposed largely proteins without any nucleic acid

DViral components may be synthesized but maturation & assembling is defective

Correct answer

C. Composed largely proteins without any nucleic acid

Explanation

The correct answer is Composed largely proteins without any nucleic acid.

Which of the following statement is correct________?

AAll of the above

BThe apatite crystals are parallel to bodies and deviate 65° from the tails

CThe bodies of rods are near occlusal and incisal surfaces, where as the tails point cervically

DIn cross sections enamel rods appear hexagonal and resembles fish scales

Correct answer

A. All of the above

Explanation

The correct answer is All of the above.

Alginate impression material is similar to Agar-agar impression material in the following respect________?

ABoth can be re-used for fresh impressions

BMixing time is increased to reduce the setting time

CGelation increase in both on increase in temperature

DDeformation during removal of impression occurs due to distortion of gel fibers

Correct answer

D. Deformation during removal of impression occurs due to distortion of gel fibers

Explanation

The correct answer is Deformation during removal of impression occurs due to distortion of gel fibers.

The following statements about verapamil are true except________?

AIt can cause constipation

BIt is less potent as a coronary vasodilator

CIt does not produce reflex tachycardia

DIt is contraindicated in patients with supraventicular tachycardia

Correct answer

D. It is contraindicated in patients with supraventicular tachycardia

Explanation

The correct answer is It is contraindicated in patients with supraventicular tachycardia.