Vitamin B12 is absorbed in the ____.
A) duodenum
B) jejunum
C) ileum
D) colon
Q. 2Intrinsic factor is required for the majority of absorption of which vitamin?
A) C
B) B6
C) B12
D) B2
Q. 3A cobalt deficiency may lead to ____.
A) pellagra
B) megaloblastic macrocytic anemia
C) beriberi
D) neurologic symptoms
Q. 4The last vitamin to be discovered was ____.
A) pantothenic acid
B) folate
C) vitamin B6
D) vitamin B12
Q. 5Tetrahydrofolate is vitally important for dividing cells during growth and cancer and knowledge of this need is used in cancer treatment by giving the drug methotrexate to inhibit the enzyme ____.
A) folylpolyglutamate synthetase
B) dihydrofolate reductase
C) formimino glutamate
D) conjugase
Q. 6Folate is vitally important for dividing cells during growth and cancer because of its essential role in the synthesis of ____.
A) lipid bilayers
B) mitochondria
C) lysosomes and peroxisomes
D) purines and pyrimidines
Q. 7Methionine is used to synthesize S-adenosylmethionine (SAM). This is important so that ____.
A) 5-methyl THF is formed
B) dUMP is catalyzed to dTMP
C) fatty acids with an odd-numbered chain can be metabolized
D) methyl groups are available
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