Test 3 Review

What is the general formula for a sugar?

• CH2O

• (C2H4O3)n

• (CH2O)n

• (CH2ON)n

Answer explanation

Lecture 12, slides 2-3

Which form of sugars predominate in nature?

• D

• L

• R

• S

Answer explanation

Lecture 12, slide 7

Given the following Fischer structure, which carbon contains the nucleophilic oxygen that attacks the carbonyl carbon in cyclization?

• 2

• 3

• 4

• 5

Answer explanation

Lecture 12, slide 12

Given the following Fischer structure, select ALL POSSIBLE correct Haworth structures

• 
• 
• 
• 

Answer explanation

Lecture 12, slides 12 and 15

Alcohols + Ketones form (a)  

Answer explanation

Lecture 12, slide 14

Alcohols + Aldehydes form (a)  

Answer explanation

Lecture 12, slide 13

True or false: Enantiomers are mirror images, while diastereomers are not mirror images, but have at least one mirrored/inverted chiral center.

• True

• False

Answer explanation

Lecture 12, slide 10

Why are chair conformations more stable than boat (1), and which position should bulky substituents go?

Answer explanation

Lecture 12, slide 24

Select ALL the hexoses

• Glucose

• Ribose

• Xylose

• Galactose

Answer explanation

Lecture 13, slide 2

(a)   bonds link 2 or more sugars together

Answer explanation

Lecture 13, slide 1; glycosidic bonds can be EITHER alpha or beta