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ASC273 Animal Nutrition > Week 6: Water soluble Vitamins > Flashcards

Week 6: Water soluble Vitamins Flashcards

1
Q

Which water soluble vitamins are stored in lrg amounts?

A

B12

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2
Q

Thiamin is what?

A

Vitamin B1

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3
Q

Thiamin is involved in ?

A

CHO metabolism

  • oxidative decarboxylation of pyruvate to acetyl CoA (TCA cycle)
  • Pentose phosphate Pathway (parrelel pathway to glycolosis) (Faaty acid, nucleic acid and AA synthesis)
  • Synthesis of branched chain AA

Nerve Transmission (thiamin triphosphate)

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4
Q

What are some good sources of Thiamin?

A

Green leaves, cereal grains and yeast

Microbial synthesis usually provides enough

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5
Q

What are some deficiency symptoms of Thiamin?

A

Anorexia
Inappetite
Incoordination
Muscle weakness (pyruvate accumulates in muscle)

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6
Q

Riboflavin is what?

A

Vitamin B2

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7
Q

What are flavoproteins?

A

proteins that contain a nucleic acid derivative of riboflavin: the flavin adenine dinucleotide (FAD) or flavin mononucleotide (FMN).

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8
Q

Defincenciy of riboflavin in ruminants?

A

Unlikely due to microbes synthesis

Excess is excreted

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9
Q

What are some deficinecy symptoms of riboflavin?

A
  • rough hair coat
  • vomiting
  • poor feed utilisation
  • curled toe paralysis
    inflam of the eye
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10
Q

Niacin is what?

A

Vitamin B3, nicotinamide

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11
Q

What is niacin required for?

A

NAD and NADP+

  • needed for energy metabolism (H transfer)
  • prodcued by microbes
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12
Q

What is Cyanocobalamin?

A

Vitamin B12

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13
Q

What is cyanocobalamin needed for?

A

Several enzyme systems including:

  • isomerases
  • dehydrases
  • methionine
  • DNA and RBC synthesis
  • propionate conversion to succinic acid
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14
Q

How is cyanocobalamin synthesised?

A

By microbes requiring cobalt

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15
Q

What is vitamin B6 needed for?

A

AA metabolism
Glycogen and lipid metabolism
Adrenaline and noradrenalin synthesis

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16
Q

What is Biotin?

A

A coenzyme in carboxylation.

It is needed for CHO and nucleic acid metabolism

Contains S, often bound to protein

17
Q

What does Folic acid (folate, folacin) do?

A

Part of coenzyme that adds and removes single C units into molecules

Essential for the synthesis of:

  • histidine
  • serine
  • glycine
  • methionine
  • purines
  • RNA
  • DNA
18
Q

What is Pantothenic acid?

A

Part of coenzyme A

  • fatty acid oxidation
  • acetic acid metabolism
  • cholestrol and steroid synthesis
  • CHO and protein metabolism
19
Q

What is Choline?

A

Not an enzyme or coenzyme, but structural component of body tissues
Can be synthesised in liver from methione

20
Q

What is ascorbic acid?

A

Vitamin C - antioxidant

An enzyme in electron transport reactions

ASC273 Animal Nutrition (10 decks)

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