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Showing page 1 of 21 (188 total shorts) — subject: "Biochemistry"
#1 Biochemistry

Apo C-II is an essential activator of lipoprotein lipase.

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Answer

Which apolipoprotein activates lipoprotein lipase?
1) Apo A-I
2) Apo B100
3) Apo C-II
4) Apo E

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#2 Biochemistry

Isoleucine yields both acetyl-CoA and succinyl-CoA.

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Which amino acid is both glucogenic and ketogenic?
1) Glycine
2) Leucine
3) Isoleucine
4) Lysine

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#3 Biochemistry

Fluoride inhibits enolase and is used in glucose estimation tubes.

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The first enzyme inhibited by fluoride during glycolysis is:
1). Hexokinase
2). Phosphofructokinase
3). Enolase
4). Pyruvate kinase

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#4 Biochemistry

Acetyl-CoA cannot be converted into glucose because pyruvate dehydrogenase is irreversible.

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Which substrate is NOT gluconeogenic?
1) Alanine
2) Lactate
3) Glycerol
4) Acetyl-CoA

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#5 Biochemistry

Apo A-I activates LCAT, promoting cholesterol esterification in HDL.

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Lecithin cholesterol acyltransferase (LCAT) is activated by:
1) Apo A-I
2) Apo C-II
3) Apo B100
4) Apo E

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#6 Biochemistry
Rate limiting step of Kreb's cycle is catalysed by isocitrate dehydrogenase
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An important rate limiting step of Kreb's cycle is catalysed by
1. pyruvate dehydrogenase
2. isocitrate dehydrogenase
3. succinate dehydrogenase
4. citrate synthetase

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#7 Biochemistry

Thiamine deficiency impairs pyruvate dehydrogenase leading to pyruvate accumulation.

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Answer

Which vitamin deficiency commonly presents with peripheral neuropathy and high pyruvate levels?
1). Vitamin B1
2). Vitamin C
3). Vitamin D
4). Vitamin K

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#8 Biochemistry

Glycogen is stored mainly in the liver and skeletal muscle.

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The principal storage carbohydrate in humans is:
1) Cellulose
2) Glycogen
3) Amylose
4) Amylopectin

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#9 Biochemistry
Glucose is a monosaccharide with a free aldehyde group in its open-chain form, allowing it to act as a reducing agent in chemical tests (like Benedict's or Fehling's). 
Cellulose is a complex polysaccharide, while dihydroxyacetone phosphate and erythrulose are phosphorylated or ketone/aldose intermediates but are not classified as standard dietary reducing sugars
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Answer
Which one of the following is a reducing sugar:
1)  Glucose
2)  Dihydroxyacetone phosphate
3)  Cellulose
4)  Erythrulose
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