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

Lactose, the primary sugar in milk, is a disaccharide composed of

A. Glucose and fructose linked by an α-1,2 bond
B. Galactose and glucose linked by a β-1,4 glycosidic bond
✓
C. Two glucose units linked by an α-1,4 glycosidic bond
D. Glucose and galactose linked by an α-1,6 glycosidic bond

📝 Explanation

Lactose is a reducing disaccharide. It is formed from β-D-galactose linked to the C4 of D-glucose via a β-1,4 glycosidic linkage. The glucose unit has a free anomeric carbon, giving lactose its reducing properties.

📖 Additional Information

  • Glucose and fructose linked by an α-1,2 bond
  • Galactose and glucose linked by a β-1,4 glycosidic bond
  • Two glucose units linked by an α-1,4 glycosidic bond
  • Glucose and galactose linked by an α-1,6 glycosidic bond

Lactose is a reducing disaccharide. It is formed from β-D-galactose linked to the C4 of D-glucose via a β-1,4 glycosidic linkage. The glucose unit has a free anomeric carbon, giving lactose its reducing properties.

🔗 Share This Question

Facebook Twitter LinkedIn WhatsApp

🧭 Navigate Questions

Previous Question

In living organisms, the disaccharide sucrose is classified as a non-reducing sugar because the glycosidic bond is formed between

Next Question

A characteristic feature distinguishing an oligosaccharide from a polysaccharide is that oligosaccharides typically contain

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 →