What forms when D-Galactose reacts with (a)acetic anhydride, (b)NaBH4, (c) H2, Ni and (d)NaOH and acetaldehyde?

4 years ago


Answers : (1)


Dear student,

Galactose is a type of sugar found in milk products and sugar beets. It is also made by the body. It is considered a nutritive sweetener because it has calories.

Galactose is a monosaccharide constituent, together with glucose, of the disaccharide lactose. The hydrolysis of lactose to glucose and galactose is catalyzed by the enzyme beta-galactosidase, a lactase.

Individuals who lack this enzyme are 'lactose intolerant' and unable to realize the nutritive potential of milk sugars. The lactose then passes to the large intestine where it is digested by bacteria, producing gas and flatulence.

Galactose is a monosaccharide. It contains six carbons and an aldehyde group and is classified as an aldose and a hexose. Both the D and L forms are found in nature. The structure depicted at the right is the D isomer. D-Galactose is commonly found in milk as part of the disaccharide lactose. L-Galactose is present in polysaccharides, such as agar.

Galactose is a sugar formed from dietary lactose. It is converted to galactose-1-phosphate and other metabolites by several enzymes, especially phosphogalactose uridyl transferase. A decrease or lack of the enzyme will cause elevated galactose and galactose-1-phosphate levels in the bloodstream.

Picture of Galactose


We are all IITians and here to help you in your IIT JEE preparation.

All the best.

 If you like this answer please approve it....

win exciting gifts by answering the questions on Discussion Forum


Sagar Singh

B.Tech IIT Delhi

4 years ago

Post Your Answer

More Questions On Organic Chemistry

Ask Experts

Have any Question? Ask Experts
Post Question
Answer ‘n’ Earn
Attractive Gift
To Win!!!
Click Here for details
When 3 methyl heptane is treated with h2so4 for sulphonation, it is said to be racemised after the rxn. i dont understand how, earlier also it was an optically active compund and even now it...
You are absolutely write , the compound formed is also optically active but in sulphonation, there will be two types of product formed and those are called enantiomer. Here at the chiral...
Naveen Kumar 2 months ago
aniline can be converted into benzene by??
Aniline can be converted into benzene as follows- 1.Treat aniline with nitrous acid which changes NH2 group to N2+Cl to form diazonium salt C6H5NH2 + HNO2 ------------> C6H5N2+Cl 2.Now...
Aarti Gupta 5 months ago
Which has higher resonance energy ch2=ch-f or ch2=ch-br?
ch2=ch-br has high resonance energy because lone pairs on Br involve in resonance easily giving more delocalization and hence more resonance energy. Flourine is more elctronegative thats why...
Ramreddy 3 months ago
yes the other one has more resonance energy because resonanance is more effective in C-F bond than in C-Br bond
daksh 2 months ago
the other one has more resonance energy
agam goel 3 months ago
What is van der waal’s force of attraction?
Van der waal’s forces is the sum of the attractive and the repulsive forces between the molecules of the same compound other than those due to covalent bonds. It’s eqn. is given by :...
Divya Kumari 28 days ago
Van der waal’s forces is the sum of the attractive and the repulsive forces between the molecules of the same compound other than those due to covalent bonds. It’s eqn. is given by :...
Divya Kumari 28 days ago
stationary orbits give energy to electrons then who will give energy to stationery orbits
Dear student, The stationary orbits donot give energy to electrons. It is the presence of electrons in certain energy shells/orbits makes the electrons in those orbits possess that energy....
Sumit Majumdar 7 months ago
no in stationary orbit the enegy of electron is quantised.because the angular momentum(mvr) is directly proportional to n(orbit) En= -13.6z^2/n^2 thanks and regards sunil kr askIITian...
Sunil Kumar FP 7 months ago
Why Eu ropium shows a sudden increase in atomic radius. (At. Radius of Sm = 180pm , Eu = 199pm and Gd = 180 pm)?
Actually there is confusion in you.The atomic radius which I found was all the same for the three element as 180 pm. Lets see,there is a decrease in atomic radius There is a decrease in the...
Sunil Kumar FP 3 months ago
@Sunil Kumar FP Go to this link and check Table 8.9 on pg.229 ncertbooks.prashanthellina.com/class_12.Chemistry.ChemistryI/8.pdf
Shibashis Mallik 3 months ago
View all Questions »