Vitamins and Digestive System Quiz

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Questions and Answers

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?

<p>Vitamin B12 (C)</p> 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?

<p>Vitamin B12 (B)</p> Signup and view all the answers

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

<p>Vitamin E (A)</p> 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?

<p>Vitamin K (C)</p> Signup and view all the answers

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

<p>Both K1 and K2 (B)</p> Signup and view all the answers

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

<p>Vitamin E deficiency (B)</p> Signup and view all the answers

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

<p>Carboxylation of glutamic residues (B)</p> Signup and view all the answers

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

<p>60-80% (C)</p> Signup and view all the answers

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

<p>Small intestine (D)</p> Signup and view all the answers

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

<p>Vitamin D (B)</p> Signup and view all the answers

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

<p>They rapidly break down (A)</p> Signup and view all the answers

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

<p>Diseases affecting the liver or gallbladder (B)</p> Signup and view all the answers

What are the neurological manifestations of Vitamin B12 deficiency?

<p>Numbness, loss of balance, confusion, mood distortion, and dementia (D)</p> Signup and view all the answers

How is Vitamin B12 absorbed in the body?

<p>B12 binds with intrinsic factor in the small intestine (C)</p> Signup and view all the answers

What is a population at risk for Vitamin B12 deficiency?

<p>Patients with pernicious anemia (B)</p> Signup and view all the answers

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

<p>Folate supplementation can correct macrocytic anemia caused by B12 deficiency (B)</p> Signup and view all the answers

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

<p>Vitamin B12 is needed to convert folate into its active form for DNA synthesis (B)</p> Signup and view all the answers

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

<p>Retinal (D)</p> Signup and view all the answers

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

<p>12mg (B)</p> Signup and view all the answers

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

<p>Dark greens (D)</p> Signup and view all the answers

What deficiency can cause night blindness according to the text?

<p>Vitamin A deficiency (A)</p> Signup and view all the answers

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

<p>To form rhodopsin (C)</p> Signup and view all the answers

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