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WorksheetsC1. Biochemistry and Monosaccharides
Total questions: 15
Worksheet time: 11mins
In terms of mass percent, which of the following statements concerning human body
composition is correct?
Bioorganic substances are much more abundant than bioinorganic substances.
Bioinorganic substances are much more abundant than bioorganic substances.
Bioorganic substances are slightly more abundant than bioinorganic substances.
no correct response
Which of the following is the most abundant type of bioorganic substance, by mass, in
the human body?
nucleic acids
carbohydrates
proteins
no correct response
Which of the following statements concerning the abundance of carbohydrates is incorrect?
They are the most abundant type of bioorganic molecule in the human body.
They are the most abundant type of bioorganic molecule in the plant world.
They are the most abundant type of bioorganic molecule on planet Earth.
Which of the following is not a function for carbohydrates in the human body?
They are a structural component of DNA and RNA molecules.
They serve as a source of energy.
They are a structural component of cell membranes.
no correct response
A carbohydrate is a polyhydroxy aldehyde, a polyhydroxy ketone, or a compound
that yields polyhydroxy aldehydes or polyhydroxy ketones upon hydrolysis. The
carbohydrate glucose is a _______________, and the carbohydrate fructose is a
__________________.
Polyhydroxy ketone and Polyhydroxy aldehyde
Polyhydroxy aldehyde and Polyhydroxy ketone
Both Polyhydroxy aldehyde
Both Polyhydroxy ketone
Which of the following functional groups is always present in a carbohydrate molecule?
hydroxyl
aldehyde
ketone
none of the above
Which of the following statements concerning monosaccharides is incorrect?
They cannot be broken down into simpler units by hydrolysis.
They contain both an aldehyde and ketone functional group.
They are either polyhydroxy aldehydes or polyhydroxy ketones.
no correct response
Which of the following is not a possible value for the number of monosaccharide units
in an oligosaccharide?
12
8
5
6
The complete hydrolysis of a polysaccharide produces many
disaccharides
monosaccharides
disaccharides
Identify the chiral centers in molecules
Chiral
Achiral
Identify the chiral center
Chiral
Achiral
Which of the following molecules possesses a chiral center?
(a)
Which of the following molecules is not an achiral molecule?
(a)
The structure of d-galactose differs from that of d-glucose at
Carbon 1 and Carbon 2
Carbon 5
Carbon 2
No correct response
In which of the following pairs of monosaccharides do the members of the pair contain
different numbers of carbon atoms?
glucose and galactose
glyceraldehyde and dihydroxyacetone
fructose and ribose
