Food Chemistry & Biochemistry MCQs (Quiz 10)

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

 Yeast proteins

 Fermentation acids

 Barley starch

 Hops

2. Denaturation of proteins causes loss of __________

 Primary structure

 Amino acids

 Biological activity

 Peptide bonds

3. Oxidative rancidity mainly results from the _______

 Denaturation of proteins

 Oxidation of unsaturated fatty acids

 Hydrolysis of starch

 Fermentation of sugars

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

 Proteins into amino acids

 Lipids into fatty acids

 Starch into shorter polysaccharides

 Cellulose into glucose

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

 Fructose

 Maltose

 Lactic acid

 Galactose

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

 Normal vision and epithelial tissues

 Bone marrow clotting

 Muscle contraction

 Protein digestion

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

 Gastric juice

 None

 Bile juice

 Pancreatic juice

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

 Lipid hydrolysis

 Sugar fermentation

 Enzymatic browning

 Protein synthesis

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

 Hemoglobin

 Collagen

 Chlorophyll

 Insulin

10. Collagen is the major structural protein found in _______

 Lymph fluid

 Connective tissues

 Blood plasma

 Bile juice

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Question 1 of 10

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