This set of Marine Biotechnology Multiple Choice Questions & Answers (MCQs) focuses on “Ocean Products & Services”.
1. Choose the correct seafood processing operations.
| Processing operation | Waste percentage |
|---|---|
| 1. Fish precooking | a. 30% bones, cut-off |
| 2. Canning | b. 15% inedible parts |
| 3. Trimming and cutting | c. 25% head/entrails |
a) 1-b, 2-c, 3-a
b) 1-a, 2-b, 3-c
c) 1-c, 2-b, 3-a
d) 1-c, 2-a, 3-b
View Answer
Explanation: Various seafood processing operations result in various wastes resulting in lowered overall productivity of fishing and/or aquaculture. Mostly the waste is discarded or used as feed/manure.
2. Fish proteins are rich in methionine and lysine.
a) True
b) False
View Answer
Explanation: Nitrogen-derived compounds from fish such as peptides and proteins contain bioactive compounds on which Nutraceuticals can be based. Fish proteins are enriched with all essential amino acids particularly methionine and lysine.
3. Which is not a source of Nutraceuticals from seafood (wastes)?
a) Lipids
b) Proteins, peptides
c) Bioethanol
d) Mineral-based compounds
View Answer
Explanation: A large portion during seafood processing operations (such as canning and filleting) is segregated as waste. These wastes can be further processed to yield bioactive compounds from proteins, lipids, and mineral based extracts.
4. Protein efficiency ratio of fish protein is greater than that of _________________
a) lactalbumin
b) histidine
c) trypsin
d) casein
View Answer
Explanation: Protein efficiency ratio (PER) of is the ratio of body weight gained to the grams of proteins consumed (in a specified time). PER of fish proteins is greater than that of casein, the major milk protein.
5. Choose the correct option.
| 1. Nutraceuticals/high value component | a. Pearl essence |
| 2. Feed, color, flavor material | b. Glucosamine |
| 3. Non-food use | c. Crustacean meal |
a) 1-b, 2-a, 3-c
b) 1-a, 2-b, 3-c
c) 1-c, 2-b, 3-a
d) 1-a, 2-c, 3-b
View Answer
Explanation: Various seafood processing wastes have diverse applications ranges from Nutraceuticals and values components to non-food use. Popular Nutraceuticals include chitin, chitosan, omega-3 fatty acids.
6. Ohmic heating and pH shifting are methods of _________________
a) protein isolation
b) hydrolysis
c) saccharification
d) lipid removal
View Answer
Explanation: Fish proteins are isolated from seafood processing wastes by such techniques as enzymatic hydrolysis, pH shifting, ohmic heating, enzymatic hydrolysis, chemical hydrolysis, and ultrafiltration.
7. Choose the correct protein isolation and purification.
| 1. Chemical hydrolysis | a. high recovery |
| 2. pH shifting | b. inexpensive process |
| 3. Superficial fluid extraction | c. low environmental impact |
a) 1-c, 2-a, 3-b
b) 1-a, 2-b, 3-c
c) 1-b, 2-c, 3-a
d) 1-b, 2-a, 3-c
View Answer
Explanation: There are numerous methods of protein isolation and purification, all with their specific merits and demerits. Chemical hydrolysis is an inexpensive process using acid/alkali treatment, pH shifting ensues high recovery; while superficial extraction with CO2 has low environmental impacts.
8. Which is not associated with fish protein hydrolyzates (FPH)?
a) Toxicity causing
b) Whipping agent
c) Gelling agent
d) Food texturing
View Answer
Explanation: Fish protein hydrolyzates (FPH) are prepared from several types of fish meat and seafood processing wastes using proteolytic enzymes. FPHs have been used as gelling, whipping, and texturing agents.
9. Skin waste from seafood processing is a rich source of collagen.
a) True
b) False
View Answer
Explanation: Skin and bone waste are rich sources of collagen, which contains three chains of peptides. Each of these chains contains a helical structure, the basic structure called tropocollagen.
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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