| Questions>Karnataka >2003> Biochemistry |
1] Which one of the following pairs of lipids & related compounds exhibit opposite biological activities?
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5-HPETE & leukotriene D4
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Cholic acid & Lithocholic acid
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Thromboxane A2 & Prostocyclin [PGI2]
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Acetone & beta- hydroxybutyrate
Ans: C
2] The cost in high energy phosphate bonds for the formation of 1 mole of glucose from pyruvate is :
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8moles of ATP
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6 moles of ATP
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4 moles of ATP
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2 moles of ATP
Ans: B
3] Which of the statements best charecterize glucose ?
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It usually exits in furanose form
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Its a ketose
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It forms part of the disaccharide sucrose
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It is oxidized to form sorbitol
Ans: C
4] Which of the following enzymes catalyze reactions in the biosynthesis of both catecholamines & Indoleamines (serotonin)
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Dopamine beta - hydroxylase
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Phenyl ethanolamine N-methyl transferase
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Aromatic amino acid decarboxylase
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Tryptophan hydroxylase
Ans: C
5] Which of the statements about protein structure is true ?
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The extended beta-configuration is not found in globular proteins
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The stability of the alpha helix is mainly due to hydrophobic interactions
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Globular proteins tend to fold into configurations that keep hydrophobic side chains in the interior of the molecule
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The primary structure of a peptide does not influence the formation of native 3 dimensional configuration
Ans: C
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