Carbohydrates

Question 1

what are the common number of carbon in monosaccharides?

Answer 1

pentose

hexose

Question 2

H-C=O is?

Answer 2

Aldehyde

Question 3

C-C=O is?

Answer 3

Ketone (C2)

Question 4

reactive site of molecule

where reaction takes place

Answer 4

functional group

Question 5

T or F

FUNCTIONAL GROUP dictates the properties and characteristics of molecule

Answer 5

True

Question 6

we commonly arrange the monosaccharides in this structure

Answer 6

Fischer Projection

Question 7

OH is on the left side of penultimate carbon

Answer 7

L Isomer

Question 8

Next to the Last Carbon that dictates if it’s L or D isomer

Answer 8

Penultimate Carbon (C5)

Question 9

T or F

D isomer is more Common in Proteins
L isomer is more Common in Carbohydrates

Answer 9

False

D is more common to Carbohydrates
L is more common to Proteins

Question 10

which is greater in number? hexose or pentose in nature?

Answer 10

hexose

Question 11

mirror images to each other

Answer 11

Enantiomers

Question 12

only 1 chiral center with different configuration

Answer 12

Epimers

Question 13

not mirror images

Answer 13

diasteromers

Question 14

T or F

D & L enantiomers are not identical when it comes to density, melting point, refractive index and boiling point.

Answer 14

False

mirror images sila kaya SAME lahat ng Physical Properties

Question 15

T or F

it is easy to separate D and L isomer

Answer 15

False

maraming steps

Question 16

cyclic structure

Answer 16

Haworth Projection

hemiacetal (c1-c5)
hemiketal (c2-c5)

Question 17

T or F

in haworth projection, hydroxyl group ATTACKS the C1 to from cyclic structure

Answer 17

True

Question 18

T or F

we place the
left side to the up
right side to the down

Answer 18

True

Question 19

T or F

nagkakaroon ng cyclic projection pag nasa solution

Answer 19

True

Question 20

if the monosaccharide is in the hawporth projection we add ______ as its last name

Answer 20

Pyranose

Question 21

OH is in downward

Answer 21

Alpha Configuration

Question 22

OH is on upward

Answer 22

Beta Configuration

Question 23

T or F

Hydrogen H+ are protonated that’s why its also prone to attack of negative molecule

Answer 23

True

Question 24

What are the Reducing Sugars?

Answer 24

All Monosaccharide

Maltose and Lactose

Question 25

what are the Non-Reducing Sugars?

Answer 25

Sucrose afaik

Question 26

it can be oxidize by weak oxidizing agent

Answer 26

Reducing Sugar | -can form a free carbonyl group C=0

Question 27

T or F it is in the anomeric carbon (C1 - C5 (aldose) C2- C5 (ketose)) where we can know if it can form a free carbonyl group

Answer 27

True

Question 28

What should be hydrolyzed to form free carbonyl group?

Answer 28

C1 or C5

Question 29

its like Haworth projection

Answer 29

Chair conformation

Question 30

T or F haworth has alpha and beta chair has axial and equatorial

Answer 30

True

Question 31

In Chair configuration, OH lies downward

Answer 31

Axial

Question 32

In Chair Configuration, OH lies upward

Answer 32

Equatorial

Question 33

T or F Left side lies on Equatorial position

Answer 33

False pag Left - axial Right - equatorial

Question 34

T or F we use anomeric carbon in fischer, haworth, chair

Answer 34

False sa Haworth & Chair Lang

Question 35

bond that is sharing of electrons

Answer 35

Covalent Link | mono & disaccharides

Question 36

glucose + galactose =

Answer 36

Lactose

Question 37

bonds in disaccharides

Answer 37

Glycosidic Bond

Question 38

T or F we can't and must not break the OXIDE BOND of disaccharides

Answer 38

False we can't and must not break the GLYCOSIDIC of dissacharides kasi babalik sila into monosaccharides

Question 39

T or F it can be a reducing sugar if the Anomeric Carbon of the sugar is not covalently link to the glycosidic bond

Answer 39

True Glucose & Galactose (c1&c5) Fructose (c2&c5)

Question 40

Glucose + Fructose=

Answer 40

Sucrose

Question 41

T or F / beta- upward V aplha - downward

Answer 41

True

Question 42

polymers of glucose in plants called starch

Answer 42

Amylose & Amylopectin

Question 43

T or F Amylose is blue if cooked & release the iodine

Answer 43

True

Question 44

T or F Amylopectin is violet if uncooked traps Iodine in helix structure

Answer 44

True

Question 45

Glycosidic bond of Fructose

Answer 45

C2 & C5

Question 46

Glycosidic Bond of Glucose & Galactose

Answer 46

C1 & C4

Question 47

a (1, 4) and a (1,6) linkages

Answer 47

Amylopectin

Question 48

a (1, 4) linkages

Answer 48

Amylose

Question 49

if we are about to produce a free carbonyl in sucrose what carbon should we hydrolyze in fructose?

Answer 49

C5 of Fructose

Question 50

Anomeric carbon of Aldose

Answer 50

C1

Question 51

Anomeric Carbon of Fructose

Answer 51

C2

Question 52

T or F if the anomeric carbon is involved in the glycosidic bond we can produce a free carbonyl group

Answer 52

False pag anomeric carbon na ang involved hindi na pwedeng maging reducing sugar

Question 53

Carbon ____ should be breakdown to form a free carbonyl group

Answer 53

C5