Vitamin Deficiencies Quiz

What is the reason for bleeding gums in Vitamin C deficiency?

• Fragile blood vessels due to reduced elastin

• Inhibition of clotting factors

• Impaired collagen formation in capillary walls

• Decreased platelet count

• Hyperplasia of gingival tissue

A dental student is studying the effects of Vitamin C on the oral cavity. Which of the following functions of Vitamin C is most critical for maintaining healthy gingival tissue?

• Activation of osteoclasts

• Stimulation of fibroblast DNA repair

• Collagen fiber cross-linking

• Promotion of enamel remineralization

• Inhibition of bacterial biofilm formation

A 45-year-old man with a diet low in fresh fruits and vegetables presents with loose teeth and bleeding gums. Which of the following lab investigations would most likely support the suspected diagnosis related to Vitamin C?

• Elevated methylmalonic acid levels

• Decreased serum calcium

• Low plasma ascorbic acid levels

• Increased serum homocysteine

• High plasma retinol levels

A patient presents with fatigue, glossitis, and dermatitis. On further evaluation, multiple vitamin B deficiencies are suspected. Which of the following combinations of coenzymes corresponds to vitamins B1, B2, and B3 respectively?

• TPP, NAD+, FMN

• NAD+, FMN, TPP

• TPP, FMN, NAD+

• FMN, NAD+, TPP

• CoA, PLP, NAD+

A chronic alcoholic presents with confusion, ataxia, and ophthalmoplegia. Administration of which coenzyme form of thiamine would be therapeutically beneficial in this condition?

• Thiamine diphosphate (TPP)

• Thiamine mononitrate

• Flavin mononucleotide (FMN)

• Pyridoxal phosphate (PLP)

• Tetrahydrofolate

Niacin is essential for the formation of which coenzyme involved in redox reactions?

• FAD

• NAD+

• TPP

• PLP

• FMN

What are the classical clinical features of pellagra caused by niacin deficiency?

• Delirium, diarrhea, dry skin

• Depression, dyspnea, dermatitis

• Dermatitis, diarrhea, dementia

• Drowsiness, dysphagia, diabetes

• Diuresis, diplopia, dry mouth

What is the role of riboflavin in energy metabolism?

• Acts as an antioxidant

• Forms part of NAD+

• Serves as a precursor for FMN and FAD

• Regulates calcium channels

• Acts as a coenzyme in protein synthesis

Deficiency of vitamin B2 leads to which of the following oral manifestations?

• Bleeding gums

• Glossitis and angular stomatitis

• Xerostomia

• Oral candidiasis

• Pigmented lesions on the tongue

What is the reason for bleeding gums in Vitamin C deficiency?

• Fragile blood vessels due to reduced elastin

• Inhibition of clotting factors

• Impaired collagen formation in capillary walls

• Decreased platelet count

• Hyperplasia of gingival tissue