(A) Decreased intake of vitamin B12
(B) Atrophy of gastric mucosa
(C) Intestinal malabsorption
(D) All of these
Tag: Biochemistry Multiple Choice Questions
Vitamin B12 is synthesized by?
(A) Bacteria only
(B) Plants only
(C) Animals only
(D) Both (A) and (C)
Vitamin B12 is transported in blood by?
(A) Albumin
(B) Transcortin
(C) Transcobalamin I
(D) Transcobalamin II
Vitamin B12 is?
(A) Not stored in the body
(B) Stored in bone marrow
(C) Stored in liver
(D) Stored in RE cells
Chemically, Extrinsic Factor of Castle is a?
(A) Mucoprotein
(B) Glycoprotein
(C) Mucopolysaccharide
(D) Cyanocobalaminm
Intrinsic factor is chemically a?
(A) Protein
(B) Glycoprotein
(C) Mucopolysaccaride
(D) Peptide
Absorption of Vitamin B12 requires the presence of?
(A) Pepsin
(B) Hydrochloric acid
(C) Intrinsic factor
(D) Boh (B) and (C)
Methylcobalamin is required for formation of?
(A) Serin from glycine
(B) Glycine from serine
(C) Methionine from homocysteine
(D) All of these