lipids and carbohydrates

Question 1

What is steric acid?

Answer 1

octadecanoic acid (18:0)

Question 2

What is palmitic acid?

Answer 2

hexadecanoic acid (16:0)

Question 3

What is oleic acid?

Answer 3

cis-delta9-octadecanoic acid (18:1(n-9))

Question 4

What is alpha linoleic acid?

Answer 4

octadecatrienoic acid (18:3(n-3))

Question 5

What is linoleic acid?

Answer 5

octadecadienoic acid

Question 6

Are triacyglycerols solid or liquid at room temperature?

Answer 6

solid

Question 7

What is the most common steroid?

Answer 7

cholesterol

Question 8

What is the empirical formula for carbohydrates?

Answer 8

(CH2O)n, n bigger than or equal to 3

Question 9

How are O-glycosidic bonds formed?

Answer 9

when a hydroxyl group reacts with the chiral carbon

Question 10

How are N-glycosidic bonds formed?

Answer 10

when the chiral carbon reacts with an N atom

Question 11

How is maltose a reducing sugar?

Answer 11

because while the alpha-D glucose is trapped due to the glycosidic bond, beta-D-glucose can open up and aldehyde group can react

Question 12

What is chitin composed of?

Answer 12

N-acetylglucosamine linked by beta-1-4 glycosidic bonds

Question 13

What are proteoglycans made of?

Answer 13

glycosaminoglycans (GAG) form crosslinked meshwork to give strength

Question 14

What are oligosaccharides synthesised by?

Answer 14

glycosyltransferases

Question 15

What are lectins?

Answer 15

proteins that recognise and bind specific carbohydrate structured

Question 16

What do lectins recognise?

Answer 16

old erythrocytes and remove them

Question 17

What do microbial pathogens use lectins for?

Answer 17

adhesion or toxic entry

Question 18

What is hemagglutinin?

Answer 18

a glycoprotein that recognises sialic acid on host surface glycoproteins