Mac 8: N Flashcards
Fill in the blanks
_____ are monosaccharides that contain a ketone group.
(either of the two)
-ketoses or ketose
True or False
Chirality is referred to as the handedness of a molecule
-True
Stereoisomers whose molecules are not mirror images of each other.
- Diastereomers
- Enantiomers
-Diastereomers
Stereoisomeric molecules that are nonsuperimposable mirror images of each other.
- Diastereomers
- Enantiomers
-Enantiomers
Which of the statements is/are TRUE?
- D-monosaccharide has the -OH on its penultimate carbon on the right when written as a Fischer projection
- L-monosaccharide has the -OH on its penultimate carbon on the left when written as a Fischer projection
- D-monosaccharide has the-PH pn its penultimate carbon on the left when written as a Fischer projection
- L-monosaccharide has the -OH on its penultimate carbon on the right when written as a Fischer projection
- A and B
- C and D
-A and B
Fill in the blanks
_____ are monosaccharides containing an aldehyde group
(either of the two)
-aldoses or aldose
Fill in the blanks
_____ is a six-membered and _____ is a five-membered hemiacetal ring.
- pyranose
- furanose
True or False
It is the penultimate carbon atom at which the mirror images are formed.
-True
True or False
The possible number of isomers of a given compound is determined by the number of asymmetric carbon
-True
True or False
Epimers differ at 2 or more of several carbon atoms.
-False (differ at 1 carbon atoms)
Which is NOT TRUE about carbohydrates?
- Only plants have carbohydrates, meat does not.
- Carbohydrates linked to proteins function in a variety of cell-cell and cell-molecule recognition processes
- It is the structural building block of the cell and components of numerous metabolic pathways
- The simpler members of the carbohydrate family are often referred to as saccharides because of their sweet taste.
-Only plants have carbohydrates, meat does not.
___ is a classification of isomers that separates monosaccharides into alpha and beta molecules.
- Anomers
- Diastereomers
- Enantiomers
- Epimers
-Anomers
Disaccharides
_____ : D-glucose and D-fructose
_____: two molecules of D-glucose
_____: D-glucose and D-galactose
- sucrose
- maltose
- lactose
True or False
Any carbohydrate that reacts with an oxidizing agent to form an aldonic acid is called reducing sugar.
-True
True or False
A carbon is said to be chiral if it is attached to not more than 3 groups of molecules.
-False (4 groups of molecules)
