Food Chemistry & Biochemistry MCQs (Quiz 10)

1. α-Amylase, an enzyme secreted by the salivary glands and pancreas, primarily hydrolyzes _______

 Starch into shorter polysaccharides

 Proteins into amino acids

 Cellulose into glucose

 Lipids into fatty acids

2. The bitter taste in beer mainly comes from compounds derived from _______

 Fermentation acids

 Hops

 Yeast proteins

 Barley starch

3. Denaturation of proteins causes loss of __________

 Amino acids

 Primary structure

 Biological activity

 Peptide bonds

4. Collagen is the major structural protein found in _______

 Blood plasma

 Bile juice

 Connective tissues

 Lymph fluid

5. Iron (Fe) is an essential mineral that plays a critical role in the synthesis of _________________

 Insulin

 Collagen

 Hemoglobin

 Chlorophyll

6. Oxidative rancidity mainly results from the _______

 Hydrolysis of starch

 Fermentation of sugars

 Denaturation of proteins

 Oxidation of unsaturated fatty acids

7. Polyphenol oxidase (PPO), an enzyme found in many fruits and vegetables, is mainly responsible for _______

 Protein synthesis

 Lipid hydrolysis

 Sugar fermentation

 Enzymatic browning

8. β-Amylase, an enzyme found in plants (e.g., germinating seeds) and some microorganisms, mainly produces _______

 Maltose

 Galactose

 Fructose

 Lactic acid

9. In humans, Vitamin A is important for maintaining _______

 Bone marrow clotting

 Normal vision and epithelial tissues

 Muscle contraction

 Protein digestion

10. Among the digestive juices_____________  has an almost neutral pH (approximately pH 7.0 to 8.0)

 None

 Gastric juice

 Pancreatic juice

 Bile juice

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Question 1 of 10

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