ch3 nutrients Flashcards

1
Q

3 classes of nutrients

A
  • Carbohydrates
  • Proteins
  • Lipids
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Which elements are the 3 classes of nutrients made out of

A
  1. Carbohydrates
    C, H, O ratio of H:O -> 2:1
  2. Protein
    C, H, O, N
  3. Lipids
    C, H, O
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

3 types of carbo

A
  • Monosaccharides
  • Diasaccharides
  • Polysaccharides
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

List the monosaccharides

A
  • Fructose
  • Galactose
  • Glucose
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

List the diasaccharides

A
  • Sucrose
  • Maltose
  • Lactose
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

List the Polysaccharides

A
  • Cellulose
  • Glycogen
  • Starch
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Tip: Start from the Monosaccharides

List the Reducing Sugars

A
  • Glucose
  • Galactose
  • Fructose
  • Maltose
  • Lactose

Sucrose not included in reducing sugars.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

List the non-reducing sugars

A
  • Sucrose
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

I would like to test a wintermelon for reducing sugars. How do I conduct this test?

A

Benedict’s Test

  1. Crush 2g, Wintermelon
  2. Add 2ml, Benedict’s Solution, add 2g crushed wintermelon, into clean test tube
  3. Shake vigorously
  4. Heat mixture in boiling water bath, 5min

R:
present: Yellow/orange/brick red precipitate formed

absent: blue Benedict’s solution remained blue

R: Stands for Results:

2: crushed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

I would like to test a sample of milk for starch. What do I do?

A

Iodine Test
Add 2ml of milk into clean test tube
Add 2 drops of iodine solution to test tube containing milk
Shake vigorously

R:
present: brown iodine solution, turned blue-black
absent: brown iodine solution, remained brown

For R: Must declare the previous colour of the solution unless special cases e.g. precipitate, emulsion formed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are proteins made of? (Not the CHNO, smth else)

A

one or more polypeptides

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are polypeptides made of?

A

many animo acids

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

I would like to test egg yolk (raw) for the presence of proteins. I am given a raw egg. What do I do?

A

Biuret’s Test
1. Add 2ml, biuret reagent into a clean test tube, with 2ml of egg yolk
2. Shake vigorously

R:
present: blue reagent turned violet
absent: blue reagent remained blue

Yes, raw egg is liquid.

P.S. During actual pract
Please remove the shell (cracc the egg) and separate the white from the yolk

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are lipids made of? (not elements)

A

1 glycerol
3 Fatty Acids

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

I would like to test a crushed watermelon for lipids

A
  1. Crush 2g, watermelon
  2. Add 2ml of ethanol to 2g, of crushed watermelon
  3. shake vigorously
  4. Decant supernatant, into test tube, containing 2ml, distilled water

R:
present: white emulsion formed
absent: clear mixture remained clear

Crushed watermelon is 2g imo because it still contains fiber

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Functions of water

A
  • Solvent
  • Reactant, biochemical reactions
  • maintain support, structure, living organisms
  • maintain body temperature
16
Q

Example of water as a s____

A
  • Main component of cytoplasm
  • dissolve substances, allows for biochemical reactions to occur in the solution
  • main component, vacuoles, store dissolved substances

substances -> nutrients + mineral salts

medium of transport for dissolved substances

17
Q

Example of water as a r____

A

reactant
- hydrolysis reaction, digestion

  • raw material, photosynthesis
18
Q

Example of water as m_____, s___

s_____ i___ l_____ o_____

A

maintain,support structure in living organisms

  • maintains turgidity, plant cells, provide support, plant
  • fill up body cavities, invertebrates, exert hydrostatic pressure, provide support, body
19
Q

Example of water m____ b____ t____

A

water in sweat -> evaporates
removes, latent heat, of vaporisation
thereby cooling, body down

high heat capacity, component, aminotic fluid, prevent fluctuation, temp

20
Q

What is cellulose in plants for?

A

cell wall synthesis

21
Q

What is starch for?

A

excess glucose stored as starch, reserve store of energy

(FOR PLANTS ONLY)

22
Q

What is glycogen for?

A

Storage form, excess glucose, reserve store of energy

(FOR ANIMALS ONLY)

23
Q

What is glucose, maltose, galactose, lactose, fructose for?

A

immediate source of energy

Substrate for respiration, releases energy, biochemical reactions

24
Q

source of
galactose
lactose
fructose
sucrose

forget source of glucose
glucose is literally everywhere lah

A

maltose (grains)
galactose (derived, lactose)
lactose (dairy products)
fructose (fruits)
sucrose (fruits)

25
Q

sucrose for wat

A

glucose -> sucrose in plants
translocation
leaves -> other parts, plant
via phloem

26
Q

protein for wat

A
  1. structural protein
  2. enzyme
  3. transport protein
  4. hormone
27
Q

protein for
s__ p___

A
  • growth, repair cells
  • contribute shaping, structure of molecules, cells, tissue
  • dna molecule coils arnd histone protein -> chromosome
28
Q

protein for
t__ p__

A

transport protein
- transmembrane proteins
- control movement, substances, in, out cell
- aquaporins, reabsorption, water molecules glomerular filtrate -> blood capillaries

29
Q

protein/fats for
h___

A

regurgitate hormone def.

a chemical substance;
produced by an endocrine gland and secreted in minute quantities directly into
the blood stream;
transported by the bloodstream to one or more specific target organs, where the
hormone exerts its effect;
destroyed in liver prevent overstimulation…

30
Q

fats for

A
  • hormone
  • phospholipids
  • subcutaneous, under skin
  • visceral, arnd internal organ
31
Q

fat
p____

A

csm main component

32
Q

fat
s___ fat

A

under skin
insulate against excessive heat loss

33
Q

fat
v__ fat

A

arnd internal organs
protect, mechanical dmg
long-term storage, energy