Which of the following monosaccharides combine to make the disaccharide lactose?
i.glucose
ii.fructose
iii.ribose
iv.galactose
A)i and ii
B)i and iii
C)i and iv
D)ii and iii
E)ii and iv

Question

Quizplus · Accepted Answer

Lactose is made up of a glucose molecule and a galactose molecule. Therefore, choices i (glucose) and iv (galactose) are the correct ones. Choice ii (fructose) and iii (ribose) are not involved in the formation of lactose.

Which of the Following Monosaccharides Combine to Make the Disaccharide