Which of the following is a triose?
a) ribose
b) deoxyribose
c) fructose
d) glyceraldehydes
Explanation: it contains three C atoms with aldehyde functional group.
Which of the following is with ketonic group?
a) ribose
b) deoxyribose
c) ribulose
d) glyceraldehydes
Explanation: Ribulose is a ketopentose — a monosaccharide containing five carbon atoms, and including a ketone functional group
Which of the following is/are hexoses with six carbon atoms?
a) glucose
b) galactose
c) fructose
d) all of these
Explanation: glucose is aldehyde and fructose is ketone, therefore these are inter-convertible (isomers).
Which of the following monosaccharides when put in water, form ring structures?
a) glucose
b) ribose
c) both a and b
d) none of them
Monosaccharide
molecules that can rotate plane of plane polarized light to right are called……
a) simple sugars
b) pentose sugars
c) hexose sugars
d) dextrose sugars
Pentose sugar in nucleotide is…….
a) beta ribose
b) alpha ribose
c) alpha ribulose
d) beta ribulose
