This set of Marine Biotechnology Multiple Choice Questions & Answers (MCQs) focuses on “Seafood Nutraceuticals”.
1. _________________ isolated from squid waste are antistatic and film forming.
a) Proteins
b) Bones
c) Extracts
d) Phospholipids
View Answer
Explanation: Proteins isolated from squid waste are antistatic, film forming and humectant moisturizers. For this reasons they have a wide applicability in cosmetics such as anti-aging and moisturizing creams.
2. Collagen and chitosan help restore skin elasticity.
a) True
b) False
View Answer
Explanation: Collagen mixed with chitosan help in restoration of skin elasticity, as has been claimed by scientific research. Collagen is a source of gelatin while chitosan is a linear polysaccharide.
3. __________________ is a heterogeneous mixture of polypeptides.
a) Chitosan
b) Chitin
c) Gelatin
d) Agarose
View Answer
Explanation: Gelatin is a heterogeneous mixture of single or multi-stranded polypeptides. It is isolated from fish waste collagen by repeated extraction with alkali and mineral acids, hence turning the seafood processing waste into a useful compound.
4. Gelatin is a hydrophilic compound.
a) True
b) False
View Answer
Explanation: Gelatin is a hydrophilic compound which is translucent, flavorless, colorless, and brittle. Depending upon the moisture content, it undergoes physicomechanical changes while interacting with water.
5. Porcine or bovine gelatin can be replaced by _______________
a) fish gelatin
b) squid collagen
c) fish meal
d) fillet
View Answer
Explanation: Fish gelatin has a melt-in-the-mouth property, a reason why it is extensively used in food products. Fish gelatin has a lower boiling point of 10°C compared to 30°C for mammalian gelatin, therefore a potential replacement of the latter.
6. Choose the correct option.
| BIOACTIVITY | FISHERY SOURCE |
|---|---|
| 1. Antihypertensive | a. Sardine, salmon, shrimp |
| 2. Antioxidant | b. Sea cucumber, mussel, squid |
| 3. Anti-coagulant | c. Blue mussel |
a) 1-a, 2-b, 3-c
b) 1-c, 2-b, 3-a
c) 1-a, 2-c, 3-b
d) 1-b, 2-a, 3-c
View Answer
Explanation: Fishery products from specific fisheries can be further treated and processed to yield bioactive compounds. Blood thinning and anti-coagulating activity can be found from blue mussel fishery.
7. Choose the appropriate option.
| ENZYMES | SOURCE |
|---|---|
| 1. Polyphenol oxidase | a. Fish viscera |
| 2. Gastric protease | b. Crustaceans |
a) 1-b, 2-a
b) 1-a, 2-b
c) 1-a, 2-a
d) 1-b, 2-b
View Answer
Explanation: Enzymes from various seafood wastes include gastric proteases such as pepsins and chymosins from fish viscera (fishery source), and phenol oxidases such as tyrosinase and phenol oxidase from crustaceans.
8. Which enzyme is used for the conversion of chitin into oligomeric units?
a) Lipase
b) Chitonlytic enzymes
c) Gastric protease
d) Transglutaminase
View Answer
Explanation: Chitinolytic enzymes from digestive tracts of fish, shellfish, squid liver, and octopus saliva are less harsh than hydrochloric acid (HCl). These are used in place of HCl to convert chitin to oligomeric units.
9. The angiotensin-I-converting enzyme (ACE) regulates __________________
a) digestion
b) fever
c) hypertension
d) diabetes
View Answer
Explanation: Angiotensin-I-converting enzyme (ACE) regulates blood pressure by converting angiotensin-I to vasoconstrictor angiotensin II. ACE inhibitor peptides from marine organisms inhibit its activity and prevent hypertension.
10. Which enzyme from salmon is a bone density conservation agent?
a) Transaminase
b) Lactase
c) Calcitonin
d) Serine protease
View Answer
Explanation: Calcitonin, an enzyme derived from salmon is a bone density conservation agent that decreases osteoporosis. Calcitonin is naturally produced in the thyroid glands. Its function is to aid in reabsorption calcium and phosphorus in the kidney tubules.
More MCQs on Seafood Nutraceuticals:
Sanfoundry Global Education & Learning Series – Marine Biotechnology.
To practice all areas of Marine Biotechnology, here is complete set of 1000+ Multiple Choice Questions and Answers.
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