Which of the following statement is not true about glucose?

By: Prof. Dr. Fazal Rehman | Last updated: February 3, 2024

Question: Which of the following statement is not true about glucose?

A  It is an aldohexose.

B It is present in furanose form.

C On heating with HI, it forms n−hexane.

D  It does not give 2, 4−DNP test.

Answer:   It is present in furanose form.

Aspect Glucose Fructose
Classification Monosaccharide Monosaccharide
Type of Sugar Aldohexose Ketohexose
Form Pyranose Furanose
Reaction with HI Forms n-hexane (alkane) Does not react with HI
2,4-DNP Test Positive Negative
Natural Sources ·        starches and sugars ·        fruits

·        honey

·        some vegetables

Digestion and Absorption Rapidly digested and absorbed in the small intestine. Absorbed more slowly in the small intestine.
Glycemic Index (GI)     Higher GI Lower GI
Taste Less sweet Sweeter
Role in the Body Primary fuel for the brain and body muscles Involved in liver glycogen replenishment
Hormonal Response Stimulates insulin release from the pancreas Has a lower impact on insulin levels compared to glucose
Health Implications Consuming excessive glucose can contribute to insulin resistance and diabetes Excessive fructose consumption has been associated with fatty liver disease, obesity and metabolic syndromes
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