1.2- monomers and monosaccharides and polymers

Question 1

monosaccharide

Answer 1

single sugar molecule

Question 2

name 3 monosaccharides

Answer 2

glucose, galactose, fructose

Question 3

name 3 key features of monosaccharides

Answer 3

1. Soluble in water
2. Sweet smelling
3. formula (CH20) n

Question 4

what type of sugar is glucose and why?

Answer 4

Glucose is a hexose sugar as it has 6 carbons

Question 5

give an example of a pentose sugar
A

Answer 5

ribose- it has 5 carbons

Question 6

monomer

Answer 6

small units which combine to make large chains (polymers)

Question 7

Give 3 examples monomers

Answer 7

monosaccharides, amino acids and nucleotides

Question 8

polymer

Answer 8

long chain of monomers

Question 9

give 3 examples polymers

Answer 9

DNA, Starch, proteins

Question 10

2 isomers of glucose

Answer 10

alpha (hydrogen at top) and beta glucose (hydrogen at bottom)

Question 11

how are monomers joined

Answer 11

chemical bond in a condensation reaction

Question 12

what’s a condensation reaction?

Answer 12

adds two molecules together and a water molecule is formed

Question 13

What is a hydrolysis reaction?

Answer 13

breaks down polymers, water molecule is added- chemical bond broken leaving 2 monomers

Question 14

are monosaccharides reducing sugars or non-reducing sugars?

Answer 14

reducing sugars

Question 15

test for reducing sugars

Answer 15

benedict’s test, heat mixture gently
Orange- brown= positive