FOOD SCIENCE (15/01/2021)

Q1. …… Stains Are Used In Negative Staining?

A} Acid Stain
B} Basic Stain
C} Neutral
D} None Of The Above
ANSWER – A} Acid

The Negative Staining Method Is Useful For Determining Cell Size And Arrangement And The Morphology Of Bacteria.Eg:Nigrosin(Acidic Stain). This Means That The Stain Readily Gives Up A Hydrogen Ion And Becomes Negatively Charged. Because The Surface Of Most Bacterial Cells Is Negatively Charged.


Q2. Holding Time In HTST Pasteurization Can Be Determined By?

A} Dye Injection Method
B} Direction Test
C} Colorimetric Method
D} Daniel-Listner Method
ANSWER – A} Dye Injection Method

Working With Water In Turbulent Flow, Injected Tracers Of Salt, Dye, And Bacteria In Holding Tubes. Measurements By The Three Methods. This Indicates That The Saline Tracer Is An Adequate Method For Measuring Residence Times Of Bacteria In Turbulent Flow Through The Holding Tubes Of HTST Pasteurization.

Q3. Maximum Residual Limited Recommended By FDA For Aflatoxin M1 In Milk Is?

A} 0.5 Microgram/Kg
B} 1.2 Microgram/Kg
C} 2.25 Microgram/Kg
D} 5 Microgram/Kg
ANSWER – A} 0.5 Microgram/Kg

Aflatoxin Are Generally Produced By Aspergillus Species, And The Particular Limit Prescribed By Food And Drug Administration (FDA) For Different Products Which Include Milk, Generally Milk Container Aflatoxin M1 And M2 And The Maximum Permissible Amount Is 0.5 Microgram/Litre And In Infant Formula It Is 0.25 Microgram/Litre.


Q4. The Term Three Quarterful Or Full Three Quarter Is Used To Denote Fruit Maturity Of?

A} Apple
B} Fig
C} Banana
D} Coconut
ANSWER – C} Banana

Normally Banana Takes 99-107 Days To Reach Three Quarters Full Maturity.

Q5. Cordial Have A TSS Of….°Brix?

A} 30
B} 20
C} 45
D} 68
ANSWER – A} 30

Cordial Have A TSS Of 30°Brix And Fruit Content Of 25 %.


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