A: Food Sciences & Nutrition Composition of Foods Flashcards
An intoxication that can result in diarrhea or vomiting; it is found in foods considered to be safe such as dry food mixes, spices, rice, etc. Contamination occurs from the soil in most cases. This is:
bacillus cereus
Note: remember this is a toxin; S/S-ab cramps, D/N
Time/Temp impt. for prevention!
How many pounds of milk does it take to make one pound of cheese?
10lbs of milk
A type of polysaccharide with amylopectin and amylose?
Starches
Note: amylopectin= branched 1-4 and 1-6 beta glucosidic linkages
amylose= 1-4 beta glucosidic linkage (indigestible/no calories)
Typically, pregnant women are not to eat deli meats due to the possibility of this bacteria.
Also in unpasterized cheeses and milks
Listeria monocytogenes (can resist heat , temps below 40F, and acidity)
9-48hr onset w/variable duration
S/S= fever, N/V, aches, flu-like illnesses, premature delivery/stillbirth (eldering develop bacteremia/meningitis)
What are the nutrient claims allowed for foods intended for infants and children <2y.o.?
- Claim describing the % of vit/min in a food in relation to a DV
- Claims on infant formulas provided for in Part 107
- The terms “unsweetened” and “unsalted”
- “Sugarfree” and “No Added Sugar” on dietary supplements only
What is the difference between the following terms?
- Use by date, best by, best before
- Sell by
- Expiration date
- Use by date, best by, best before: relating to its best quality if before the date but still safe after date.
- Sell by: usually on perishable items; just the date to sell by but okay days after if stored properly
- Expiration date: the only product legally requiring this date is infant formula and some baby foods
______ refers to the changes that take place to starch granules with prolonged heating. The starch granules swell and reach maximum volume, then begin to rupture, becoming thin.
Implosion
Ex: gravy heated, left on simmering for 30mins= thin
What does homogenization do to milk?
Forces fat droplets through small screen, reducing size and dispersing them to form a stable emulsion.
What grade is an egg with flatten yolk, larger thinner proportion to thick whites called?
Grade B

What are the proteins in milk and their %?
Casein (80%) and whey (20%)
What are the examples of relative claims?
- Light
- Reduced & Added (or extra, plus, fortified, enriched)
- More and Less (or fewer)
This type of intoxication can lead to N/V/D, double & blurred vision, possible respiratory failure, paralysis and DEATH.
clostridium botulinum (botulism)
The DHHS, USDA, EPA, Commerce, and State all actively participate in the _____standards
Codex
What are the components of milk?
- Carbohydrates
- Proteins
- Vitamins
- Minerals
Colloidal system examples are emulsion, foam, sol, and gel. Explain each one.
Colloidal system= one substance disbursed NOT dissolved in another
- Emulsion= liquid in liquid
- Foam= gas in liquid (whipped cream)
- Sol= solid in liquid (gravy)
- Gel= liquid in solid (custard)
What nutrients can be found in the yolk? In the whites?
yolk: fat, protein, vitamins, iron, cholesterol
whites: vitamin B, riboflavin
Note: eggs are the richest source of choline, contains carotenoids (lutein and zeaxanthin)
Overrun is governed by federal standards in that the finished product must not weigh less than ___pounds per gallon.
4.5 pounds
What is the purpose of USDA grading?
to help the untrained consumer to buy quality
What happens to eggs with prolonged storage?
- Air cell increases in size
- pH increases as egg ages b/c of loss of vit C
- Yolk membrane weakens
- white becomes thinner

This pigment when in contact with acid turns bright red. Alkaline will make it turn_______. It is also affected by metals ___ & ___, turning it green/blue slate.
Anthocyanins
+acid= bright red
+alkaline= bluish
+Iron & aluminum= green/blue/slate
What inhibits gluten formation?
Sugar (widen’s gluten strands) and
Fats (coats water, prevents water from making contact)
If a cake is dense with a heavy texture, what might be reasons why this occured?
- Oven temperature was not high enough ( too low)
- Not enough leavening agents
- Too much fat & liquids
What are the benefits and risk of GMOs?
- Benefits:
- Extend shelf life
- Increase ntr composition
- More efficient food processing
- Crops resist herbicides
- Crops produce their on herbicides
- Risks
- Disruption of ecosystems
- Introduction of diseases
- Introduction of allergens/toxics
- Ethical dilemmas
An imitation ice cream product that has no butterfat or milk solids.
Parevine






