What is the co-factor for the proteolytic enzyme, carboxypeptidase?

1. Molybdenum 2. Manganese
3. Zinc 4. Copper

Subtopic:  Enzyme Cofactors |
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Most of the coenzymes contain:

1. Metal ions 2. FMN and FAD
3. Ribonucleoproteins 4. Vitamins
Subtopic:  Enzyme Cofactors |
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Most common element present in human body is:

1. Oxygen 2. Carbon
3. Hydrogen 4. Sulfur
Subtopic:  Element Analysis |
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Which of the following is not an aromatic amino acid?

1. Phenylalanine 2. Threonine
3. Tyrosine 4. Tryptophan
Subtopic:  Amino Acids |
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Formation of glycosidic bond represents:

1. Dehydration 2. Hydrolysis
3. Dehydrogenation 4. Isomerization
Subtopic:  Carbohydrates |
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Consider the following statements:

I: Glycine is the simplest amino acid, with a hydrogen atom as its side chain (R group).
II: Tryptophan is an aromatic amino acid.
III: Lysine is an acidic amino acid.

 
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct

Subtopic:  Different Amino Acids |
Level 4: Below 35%

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Many organic substances are negatively charged e.g., acetic acid, while others are positively charged e.g., ammonium ion. An amino acid under certain conditions would have both positive and negative charges simultaneously in the same molecule. Such a form of amino acid is called
1. Positively charged form
2. Negatively charged form
3. Neutral form
4. Zwitter ionic form
Subtopic:  Amino Acids |
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Sugars are technically called carbohydrates, referring to the fact that their formulae are only multiples of C(H2O). Hexose therefore has six carbons, twelve hydrogen and six oxygen atoms. Glucose is a hexose. Choose from among the following another hexose.

1. Fructose 2. Erythrose
3. Ribulose 4. Ribose
Subtopic:  Carbohydrates |
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When we homogenize any tissues in an acid the acid soluble pool represents

1. Cytoplasm 2. Cell membrane
3. Nucleus 4. Mitochondria
Subtopic:  Introduction |
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What level of protein organization structure explains the 3-D shape of an enzyme?

1. primary structure 2. tertiary structure
3. secondary structure 4. quaternary structure
Subtopic:  Proteins |
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