객관식
What type of molecule is cellulose primarily composed of?
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28. Carbohydrates
Monosaccharide
객관식
Which of the following statements about is false?
A
is an aldohexose.
B
can exist in both and forms.
C
is a ketose sugar.
D
is the primary energy source for cells.
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검증된 단계별 안내1
Identify the structure of glucose: Glucose is a monosaccharide with the molecular formula C₆H₁₂O₆. It is an aldohexose, meaning it contains an aldehyde group and has six carbon atoms.
Understand the difference between aldoses and ketoses: Aldoses have an aldehyde group at the end of the carbon chain, while ketoses have a ketone group typically at the second carbon atom.
Examine the statement 'Glucose is an aldohexose': Since glucose has an aldehyde group, this statement is true.
Examine the statement 'Glucose can exist in both alpha and beta forms': Glucose can cyclize to form a hemiacetal, resulting in two anomers, alpha and beta, depending on the position of the hydroxyl group at the anomeric carbon. This statement is true.
Examine the statement 'Glucose is a ketose sugar': Since glucose is an aldohexose and not a ketose, this statement is false, making it the correct answer to the question.
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