2.2 Carbohydrates and monosaccharides Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

Carbohydrates are..

A

Carbon molecules + water

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

Do carbons readily or not readily form bonds with other carbon atoms?

A

Readily. This allows a sequence of carbon molecules to be built up.

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

Carbon containing molecules are known as what molecules?

A

Organic molecules,.

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

Individual molecules that make up a chain are known as?

A

Monomers (mono - one)

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

Longer chains of repeating monomer units are called?

A

Polymers (poly - many)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Carbohydrates and proteins are often what?

A

Polymers.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Four main elements?

A

Carbon, hydrogen, oxygen and nitrogen.

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

A single and a pair of basic carbohydrate monomers (saccharides) are called what?

A

Monosaccharide, and disaccharide. Monosaccharides combined in much larger numbers are also called polysaccharides.

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

The best known monosaccharide is glucose. What is the formula for glucose?

A

C6 H12 O6

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

All monosaccharides and some disaccharides are reducing sugars. What is the test for this?

A

Benedicts test. Benedicts is an alkaline solution of copper(ii) sulfate. When a reducing sugar is heated with this, an insoluble red precipitate of copper(i) oxide forms.

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

What are the steps to carry out benedicts test?

A

-Add 2cm of food sample to test tube (grind up with water if not already in liquid form). -Add equal ammount of benedicts. -heat mixture in bath for 5 mins.

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

Resuts for benedicts test?

A

-no colour change = no reducing sugar. -green = very low concentration of reducing sugar. -yellow = low concentration of reducing sugar. -orange = medium concentration of reducing sugar. -red = high concentration of reducing sugar.

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

a-glucose structure.

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