21. What is the product of the catabolic breakdown of Alanine?

A. Fumarate
B. Oxaloacetate
C. Pyruvate
D. Malate

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22. How many different amino acids are there?

A. 3
B. 20
C. 100
D.  An infinite number

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23. Amino acids required in the human diet and not synthesized by the body are called

A. specialized
B. trace
C. essential
D. accessory

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24. Which of the following amino acid contain an imidazolium moiety?

A. Alanine
B. Valine
C. Cysteine
D. Histidine

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25. The sequence of letters ‘WYQN’ will represent

A. Tryptophan, tyrosine, glutamic acid, asparagine
B. Tryptophan, tyrosine, glutamine, asparagine
C. Tryptophan, glutamine, tryptophan, asparagine
D. Glutamine, tyrosine, tryptophan, aspartic acid

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