Fehlings Test

Question 1

What is the fehling test?

Answer 1

To identify reducing sugars=aldoses

Question 2

Reducing -meaning it can _______ to an ___________ with an aldehyde.

Answer 2

Convert

Open-chain

Question 3

Nonreducing -cannot convert to an ______ form with an aldehyde.

Answer 3

Open-chain

Remains cyclic

Question 4

Reducing ——-> examples

Answer 4

Lactose

Maltose

Question 5

Non-Reducing ——-> Examples

Answer 5

Sucrose

Trehalose

Question 6

Sugars_______ be able to OPEN and CLOSE in __________ to form a reducing end.

Answer 6

MUST

RING-FORM

Question 7

Some DISACCHARIDES are formed by two ________ and can be either reducing or non-reducing depending on_________.

Answer 7

Monosaccharides

Glycosidic bond

Question 8

What is a glycosidic bond?

Answer 8

Is when one sugar can be bonded to another sugar by an OXYGEN BOND