Carbohydrates -Lipids Flashcards

1
Q

What are the 3 types of macronutrients?

A

Carbohydrates, Protein, Lipids

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2
Q

What is a calorie?

A

unit of measure for
energy, that our body uses for all of our vital process.

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3
Q

How many
calories of energy
are contained in a
gram?
Protein, Digestive carbs, Alcohol, fats and oils, indigestive carbohydrates, water, minerals

A

Protein ~ 4
Digestive carbs ~ 4
Alcohol ~7
fats and oils ~9
indigestive carbohydrates ~ 0
water ~ 0
minerals ~ 0

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4
Q

what are complex carbohydrates? why are important?

A

Oligosaccharide
Polysaccharide
Ex. Starches ~ found in grain

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5
Q

starches characteristic

A

swelling
if starches are heated or in water they can expand

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6
Q

what is Starch Retrogradation

A

the realignment of starch polymers

causes: expulsion of water, staling

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7
Q

what does “modify starch” mean?

A

to prevent retrogradation, manufacturers chemically modify starches

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8
Q

what makes a “waxy” starch “waxy”

A
  • Starches with high amylopectin percentages are
    called “waxy” starches
    ex. cornstarch

more amylopectin, the less retrogradation

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9
Q

what is a simple carbohydrate? why are they important?

A

contain 1-2 types of sugars
digest very quickly

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10
Q

what is a Monosaccharide?

A

the most basic form of any carb molecule

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11
Q

What is a disaccharide?

A

Simple carb
sucrose/ lactose

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12
Q

what is a oligosaccharide?

A

Complex carbs

Carb found in plants, human milk

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13
Q

what is the difference between complex and simple carbohydrates?

A

Complex carbohydrates are digested more slowly and release glucose into the blood stream more gradually. Simple carbohydrates are digested quickly and spike blood sugar faster and higher

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14
Q

why are complex carbohydrates important in the food industry?

A

foods contain modify staches

makes the product easier to use in certain recipes

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15
Q

What is a protein?

A

polymers composed of amino acids, linked together to make large molecules. Linear chains

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16
Q

What are the basic building blocks of a protein?

A

amino acids linked together by peptide bonds -> Secondary structure: B-Sheets are held together by hydrogen bonds -> tertiary structure held by hydrophobic interactions, sulfide crosslink, salt bridge, hydrogen bondings -> Quaternary structure

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17
Q

what are secondary structure and examples

A

Secondary structure: B-Sheets are held together by hydrogen bonds

Ex: Silk fibroin ~ the main protein in silk

18
Q

what are tertiary structure and give an example

A

tertiary structure held by hydrophobic interactions: sulfide crosslink, salt bridge, hydrogen bondings

Ex: Fibrous protein used to create connective tissue

19
Q

what are Quaternary structure and what are some examples?

A

Hemoglobin molecules

Ex: Enzymes, structural protein

20
Q

Can we break down amino acids?

A

water chemically break up the peptide bond

Called: Hydrolysis

21
Q

Hydrolysis is important to the Human body because it….

A

can break down essential amino acids from foods

Body is made of 60% water and 20% protein

22
Q

why is hydrolysis important to the food industry?

A

Hydrolysis process is extensively used in the food industry for the transformation of cellulosic materials into fermentable materials by adding the enzymes.

23
Q

What is a protein Denaturation,what structure gets disrupted, and what are the characteristic of denaturation food?

A

disruption, through acid or heat, of secondary and tertiary structures but not strong enough to break the peptide bonds

Ex: when an egg gets heated up the yok goes from a liquid to a gel

24
Q

what do proteins effect in the human body?

A

repair and build the human tissue

25
what are wheat proteins
albumins and globulins ( ex. cellular proteins and enzymes) Gluten Proteins : Prolamins - storage proteins (ex. Gliadin) Glutelin - storage proteins
26
what is gluten and how does it effect people who are allergic?
gluten is a dough strengthener. People who are allergic can't break down the gluten protein so they feel sick
27
describe the difference between essential and non essential amino acids?
Essential - amino acids the body cannot produce on its own but need it to survive Non-Essential - not needed to survive and not produced by the body
28
name and describe alternate sources of protein from around the World.
Soy - high in Vitamin E, unsaturated Fatty Acid Tofu - grinded soy beans Insects- cooked or eaten raw (ex. Inswa - Zambia) Blood
29
how many calories are found in one gram of fat?
9
30
Diluting a food with water will ______ the % calories from fat?
does not change
31
Diluting a food with water will ____ the % of fat (by weight)
decreased
32
True/False Fats are solids at room temperature
True
33
True/False Oils are liquids at room temperature
True
34
Trans fats Facts
was created to make life storage longer formed durning the production of process foods associated with cardiovascular disease
35
how are lipids an energy source
Lipids are stored in adipose tissue and can be broken down into fatty acids and glycerol, which can then be used as a source of energy by the body
36
why are lipids important to the body?
source of energy Provide essential fatty acids help absorb fat soluble nutrients Heat transfer agents Components of adipose tissue
37
what does low fat or fat free mean?
Could be labeled 70% ‘fat free’ (30% fat)
38
what are some fat substitutes/replacement
Simplesse - made form dairy/eggs Olestra - chemically bonds fatty acids onto sugar molecules
39
what are the changing perceptions when it comes to fats
new labeling system: Now lists Total fat and types of fats
40
what is the difference between saturated and unsaturated fat?
Unsaturated have a double bond withhydrogen and saturated do not
41
What is the difference between water/fat soluble?
Water-soluble vitamins dissolve in water and are not stored in the body, while fat-soluble vitamins dissolve in fat and can be stored in the body