M2 L1 Carbohydrates

Question 1

_________called sugars and starches are
polyhydroxy aldehydes or ketones, or compounds
that can be hydrolyzed to them.

Answer 1

Carbohydrates

Question 2

two mono- saccharide units joined together.

Answer 2

disaccharides

Question 3

three or more monosaccharide units joined together.

Answer 3

polysaccharides

Question 4

Carbohydrates are synthesized in green plants by _____ whereby energy from the sun is
stored as chemical energy in carbohydrates.

Answer 4

photosynthesis

Question 5

In the body, they are used for bursts of energy

needed during exercise in the form of ____

Answer 5

glucose

Question 6

what are the simplest carbohydrates? (clue: simple lang = single-mindedness)

Answer 6

MONOsaccharides

Question 7

3 to 6 C atoms in a chain with an

aldehyde or ketone ending and many –OH groups

Answer 7

monosaccharides

Question 8

Aldehyde monosaccharides are ____; ketone

monosaccharides are _______

Answer 8

aldoses; ketoses

Question 9

Simplest aldose: (clue: from the word aldehyde)

Answer 9

glyceraldehyde

Question 10

simplest ketose: ____ (clue: nail polish remover)

Answer 10

dihydroxyacetone

Question 11

are glyceraldehyde and dihydroxyacetone isomers?

Answer 11

yes

Question 12

A triose has 3 C’s.
A tetrose has 4 C’s.
A pentose has 5 C’s.
A hexose has 6 C’s.
 [no ans]

Answer 12

wala lang

Question 13

Glyceraldehyde is an aldotriose.
Dihydroxyacetone is a ketotriose.

[no and]

Answer 13

wala lang

Question 14

Monosaccharides are sweet-tasting, but their
relative sweetness varies greatly. [true/false]

They are polar compounds with low melting points. [true/false]

The presence of so many polar functional groups
capable of hydrogen bonding makes the
monosaccharides very water soluble. [true/false]

Answer 14

true;
false; high melting points
true