Q1. Soybeans and soy-based foodstuffs are a particularly rich source of___________.

1. Isoflavones
2. Lignans
3. Coumestans
4. All of the above

ANSWER: A. Isoflavones

• Explanation: Soybeans and soy-based foodstuffs are a rich source of Isoflavones. Phytoestrogens come in a variety of forms, one of which is isoflavones. Isoflavones are powerful antioxidants that can mimic estrogen’s actions, although their complete physiological consequences are still being studied. The most prevalent source of isoflavones in food is soybeans. The amount of isoflavones in soy food varies depending on the type, preparation technique, and brand. Soy flour and soy nuts are two of the richest sources of isoflavones.

READ MORE – Food Science & Technology Quiz (27-01-2022)

Q2. Which of the following is not in the category of hydrophilic polymers?

1. Poly dimethyl siloxane
2. Polyvinyl alcohol
3. Cellulose acetate
4. Poly (D, L-lactic-co-glycolic acid) (PLGA)

ANSWER: A. Poly dimethyl siloxane

• Explanation – Water permeability is preferred by hydrophilic polymers. Hydrophilic polymers include polyvinyl alcohol and cellulose acetate. Permeation of organic molecules is preferred by hydrophobic polymers such as poly dimethyl siloxane, PLGA, and others. PDMS is a hydrophobic material. Surface chemistry can be changed by plasma oxidation by adding silanol (SiOH) groups to the surface. This application can use both atmospheric air plasma and argon plasma. The PDMS surface becomes hydrophilic as a result of this treatment, allowing water to wet it.

READ MORE – Food Science & Technology Quiz (17-01-2022)

Q3. Which among the following is the correct option for the statement “Pressure and temperature exert antagonistic forces on molecular structure & chemical reaction.”

1. Le chatelier’s principle
2. Principle of microscopic reordering
3. Iso-static principle
4. Charle’s law

ANSWER – B. Principle of microscopic reordering

• Explanation: At constant temperature, the concept of microscopic reordering states that increasing pressure enhances the degree of ordering of molecules in a particular substance. Pressure and temperature, as a result, have opposing effects on molecule structure and chemical reactions. The isostatic principle states that pressure is applied instantly and uniformly throughout the sample.

READ MORE – Food Science & Technology Quiz (17-02-2022)

Q4. Which of the packaging materials is/are suitable for high-pressure treatment?

1. EVOH and PVOH copolymer films
2. Semi-rigid trays
3. Metal cans
4. Paper bags

ANSWER: D. Paper bags

• Explanation: Airtight flexible containers that can tolerate a volume change in proportion to the product’s compressibility are required. The packaging must be able to accommodate a volume reduction of up to 15%. Plastic films such as EVOH and PVOH, as well as semi-rigid trays, are commonly employed. Metal cans and glass bottles should not be used.

READ MORE – Food Science & Technology Quiz (07-02-2022)

Q5. Which is not a predominant mechanism for transport and separation through nanofiltration membranes?

1. Size exclusion
2. Charge-charge effect
3. Diffusion
4. Convection

ANSWER: C. Diffusion

• Explanation – In reverse osmosis, the most common method for molecular movement is diffusion. Solutes are transported and separated in nanofiltration through three mechanisms: size exclusion, charge-charge interaction, and convection. Diffusion is the net transfer of something from a higher concentration zone to a lower concentration region. A gradient in Gibbs free energy or chemical potential drives diffusion.

READ MORE – Food Science & Technology Quiz (26-02-2022)

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