Chapter 4 - Carbs Structure And Fx Flashcards Preview

Biochemistry DK > Chapter 4 - Carbs Structure And Fx > Flashcards

Flashcards in Chapter 4 - Carbs Structure And Fx Deck (12):
1

Draw out

1) D-fructose
2) D-glucose
3) D-Mannose
4) D-Galactose

**fischer, line, dash/wedge

To the drawing board!

2

What is absolute configuration ? What is relative?.

Absolute: R vs S
D. L

Relative : cis / trans

3

What do + and - denote for molecules?

The direction of rotation

*cannot be determined by L and D...needs to be experimentally

4

Epimer

Type of diastereomers that differ in configuration by exactly one chiral centre

5

How many carbons are in Pyranose and furanose?

Pyranose: six

Furanose: 5

6

Anomeric carbon

On a cyclic sugar, the carbon which is attacked by the OH ...Which becomes chiral

Forms alpha and beta anomers
**think of them relative to the CH2OH

Trans = alpha
Cis = beta

7

What is mutarotation?

Spontaneous change about C-1 carbon between alpha and beta

8

Draw:
1) sucrose
2) lactose
3) maltose

Good luck

9

Draw the chair conformation of glucose

Another draw. Daniel, I’m going to have to trust you can do this

10

What is maltose made of of?

Glucose - glucose

11

Sucrose is...

Glucose and fructose

12

Lactose

Glucose and galactose