Ambergris: A solid, waxy, combustible substance of immense value in the perfume industry as a fixative.
Formed in the digestive tract of the sperm whale (Physeter macrocephalus) as a protective intestinal secretion around the sharp, indigestible chitinous beaks of its primary prey: Squids and cuttlefishes.
Correct Option: Option 3 (Squid & Cuttlefishes).
Explanation not matching this question?क्या व्याख्या इस प्रश्न से मेल नहीं खा रही?Report
107
Fish Processing Technology- ICAR JRF/SRF 2024
MCQ (Single Correct)
The chemical additive, most effective in controlling yeast and molds in food, is
Benzoic Acid / Sodium Benzoate (E210/E211): A chemical preservative most effective in controlling yeasts and molds in acidic foods (optimal activity at $\text{pH } 2.5 - 4.5$).
In its undissociated, lipophilic form, it traverses the microbial plasma membrane, acidifies the cytoplasm, and inhibits key metabolic enzymes (phosphofructokinase, $\alpha$-ketoglutarate dehydrogenase).
Correct Option: Option 2 (Benzoic acid).
Explanation not matching this question?क्या व्याख्या इस प्रश्न से मेल नहीं खा रही?Report
108
Fish Processing Technology- ICAR JRF/SRF 2024
MCQ (Single Correct)
Stockfish (dried without the addition of salt) is produced from. fish
Stockfish: A traditional, unsalted, naturally dried whole fish delicacy originating from Northern Norway.
Produced exclusively from Atlantic Cod (Gadus morhua) by hanging gutted, beheaded cod on wooden drying racks (hjell) to dry in cold ocean winds over several months without the addition of salt.
Correct Option: Option 1 (Cod).
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'Irish Moss' (Chondrus crispus): A marine red alga (phylum Rhodophyta) found along the rocky North Atlantic coast.
It is the historic natural source of Carrageenan, a family of sulfated linear galactan polysaccharides widely used in food processing as gelling agents, thickeners, and stabilizers.
Correct Option: Option 3 (Carrageenan).
Explanation not matching this question?क्या व्याख्या इस प्रश्न से मेल नहीं खा रही?Report
110
Fish Processing Technology- ICAR JRF/SRF 2024
MCQ (Single Correct)
The squalene was first discovered in liver oil of sea sharks by
In 1906, Japanese chemist Mitsumaru Tsujimoto isolated an unsaturated hydrocarbon from the liver oil of kuroko-zame (deep-sea dogfish shark) and determined its molecular formula, naming it squalene in 1916 after the shark genus Squalus.
Correct Option: Option 4 (Mitsumaru Tsujimoto).
Explanation not matching this question?क्या व्याख्या इस प्रश्न से मेल नहीं खा रही?Report