Food Chemistry & Biochemistry MCQs (Quiz 10)

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

 Galactose

 Lactic acid

 Maltose

 Fructose

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

 Cellulose into glucose

 Lipids into fatty acids

 Starch into shorter polysaccharides

 Proteins into amino acids

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

 Hops

 Barley starch

 Fermentation acids

 Yeast proteins

4. Collagen is the major structural protein found in _______

 Lymph fluid

 Blood plasma

 Connective tissues

 Bile juice

5. Denaturation of proteins causes loss of __________

 Amino acids

 Primary structure

 Peptide bonds

 Biological activity

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

 Insulin

 Collagen

 Hemoglobin

 Chlorophyll

7. Oxidative rancidity mainly results from the _______

 Denaturation of proteins

 Oxidation of unsaturated fatty acids

 Hydrolysis of starch

 Fermentation of sugars

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

 Bile juice

 None

 Gastric juice

 Pancreatic juice

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

 Lipid hydrolysis

 Protein synthesis

 Enzymatic browning

 Sugar fermentation

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

 Protein digestion

 Muscle contraction

 Bone marrow clotting

 Normal vision and epithelial tissues

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Question 1 of 10

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