Vitamins and Digestive System Quiz

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Which vitamin is essential for the synthesis of choline, serine, glycine, and methionine?

Vitamin B1

Vitamin B9 (correct)

Vitamin B2

Vitamin B6

Which deficiency can lead to neural tube defects (NTD), such as spina bifida and anencephaly?

Vitamin B12 deficiency

Vitamin B9 deficiency (correct)

Vitamin B7 deficiency

Vitamin B6 deficiency

Which vitamin deficiency can cause megaloblastic anemia characterized by large cells in the bone marrow?

Vitamin B12 (correct)

Vitamin B5

Vitamin B1

Vitamin B3

Which vitamin is crucial for nucleic acids synthesis and metabolism of succinyl-CoA?

Vitamin B12 Signup and view all the answers

From the provided text, which vitamin can only be obtained from animal sources and may be lacking in vegan diets?

Vitamin B12 Signup and view all the answers

Which vitamin is absorbed by the small intestine with lipids and delivered to tissues by lipoproteins?

Vitamin E Signup and view all the answers

Which vitamin is a coenzyme for post-translational modification of coagulation factors and involved in the production of thrombin?

Vitamin K Signup and view all the answers

In what form can Vitamin K be synthesized in the body?

Both K1 and K2 Signup and view all the answers

Which condition puts newborns at risk of hemolytic anemia due to membrane damage of red blood cells?

Vitamin E deficiency Signup and view all the answers

What role does Vitamin K play in the body that makes it crucial for blood clotting?

Carboxylation of glutamic residues Signup and view all the answers

What percentage of vitamins are typically absorbed in the small intestine?

60-80% Signup and view all the answers

Which part of the body is essential for the absorption of fat-soluble vitamins?

Small intestine Signup and view all the answers

Which type of vitamins are associated with body fat and have a constant circulating concentration?

Vitamin D Signup and view all the answers

What is the main reason water-soluble vitamins must be regularly supplied in the diet?

They rapidly break down Signup and view all the answers

Which condition can lead to deficiencies in fat-soluble vitamins?

Diseases affecting the liver or gallbladder Signup and view all the answers

What are the neurological manifestations of Vitamin B12 deficiency?

Numbness, loss of balance, confusion, mood distortion, and dementia Signup and view all the answers

How is Vitamin B12 absorbed in the body?

B12 binds with intrinsic factor in the small intestine Signup and view all the answers

What is a population at risk for Vitamin B12 deficiency?

Patients with pernicious anemia Signup and view all the answers

Why can high doses of folate supplements mask Vitamin B12 deficiency symptoms?

Folate supplementation can correct macrocytic anemia caused by B12 deficiency Signup and view all the answers

What is the role of Vitamin B12 in relation to folate?

Vitamin B12 is needed to convert folate into its active form for DNA synthesis Signup and view all the answers

Which compound serves as a prosthetic group of opsin to form rhodopsin?

Retinal Signup and view all the answers

What is the equivalent amount of beta-carotene to 1mg of retinol?

12mg Signup and view all the answers

What is the main source of provitamin A carotenoids according to the text?

Dark greens Signup and view all the answers

What deficiency can cause night blindness according to the text?

Vitamin A deficiency Signup and view all the answers

What is the primary function of retinal (11-cis retinal) in the visual cycle?

To form rhodopsin Signup and view all the answers