nmdcat.online
BIO NMDCAT Carbohydrates
nmdcat.online June 27, 2026

In the formation of a ring structure, the reaction between the carbonyl group and a hydroxyl group of a monosaccharide creates a more reactive form known as a

A. Enantiomer
B. Hemiacetal or hemiketal
✓
C. Epimer
D. Zwitterion

📝 Explanation

The nucleophilic addition of an alcohol (hydroxyl group) to a carbonyl group forms a hemiacetal (from an aldehyde) or a hemiketal (from a ketone). This intramolecular reaction converts the linear monosaccharide into its cyclic form, creating a new chiral center (the anomeric carbon).

📖 Additional Information

  • Enantiomer
  • Hemiacetal or hemiketal
  • Epimer
  • Zwitterion

The nucleophilic addition of an alcohol (hydroxyl group) to a carbonyl group forms a hemiacetal (from an aldehyde) or a hemiketal (from a ketone). This intramolecular reaction converts the linear monosaccharide into its cyclic form, creating a new chiral center (the anomeric carbon).

🔗 Share This Question

Facebook Twitter LinkedIn WhatsApp

🧭 Navigate Questions

Previous Question

The general empirical formula for most carbohydrates is (CH₂O)n, and the functional groups that classify a monosaccharide as an aldose or a ketose are, respectively

Next Question

The functional group that defines a sugar as a reducing agent in reactions like Benedict's test is a free

Back to All Questions

🔗 Related MCQs

An increase in the incidence of ectopic pregnancies within a population can often be epidemiologically correlated with a prior increase in the prevalence of which sexually transmitted disease?
July 16, 2026
In the life cycle of Herpes Simplex Virus 2 (HSV-2), the virus travels along nerve fibers to reach the sensory ganglia. The cellular mechanism responsible for this retrograde transport utilizes:
July 16, 2026
A defining characteristic of the lesions associated with the secondary stage of syphilis is that they:
July 16, 2026
The causative agent of genital herpes, HSV-2, is enveloped. The biological significance of this viral envelope in the context of transmission is that it makes the virus:
July 16, 2026
The structural basis for the severe cardiovascular complications seen in tertiary syphilis, such as aortic aneurysms, is the chronic inflammation and destruction of:
July 16, 2026

Categories

View all →