Biochemistry - Carbohydrate - Discussion

Discussion :: Carbohydrate - Section 1 (Q.No.3)


Humans are unable to digest

[A]. starch
[B]. complex carbohydrates
[C]. denatured proteins
[D]. cellulose

Answer: Option D


No answer description available for this question.

Hema said: (Oct 10, 2012)  
Generally for cellulose digestion we need cellulase enzyme. Human body does not contain cellulase enzyme. That is the reason why we can not eat grass but an cow does it, cow contains cellulase enzyme.

Ataria said: (Nov 11, 2013)  
Humans lack cellulase enzyme which is present in ruminants.

Vipinvinny said: (Dec 5, 2013)  
The enzyme present in human is @(alpha) amylase which can not break Beta 1-4 linkage which is present in Cellulose.

Shaaron said: (Dec 7, 2013)  
Cellulose are only present in plants.

Edna said: (Dec 17, 2013)  
Because human do not have cellolase - an enzyme that hydrolyze cellulose.

Philip said: (Jan 10, 2014)  
Yeah, our body do not have enzymes for digesting cellulose while other mammals does, i.e. Ruminants.

Bankole said: (Mar 26, 2014)  
This is because human system lack cellulase. It is present in ruminant animals.

Abhiram Rao said: (Apr 26, 2014)  
The human body lacks in the enzyme cellulase, which is essential to convert cellulose into simpler form. Hence the humans cannot digest cellulose, unlike plants which do possess the enzyme cellulase.

Sop said: (Oct 6, 2014)  
The body of a human does not have dna coding for enzymes that digest cellulose, these enzymes are found in animals that eat grass but not in humans.

Dyan said: (Mar 23, 2015)  
Human does not have the enzyme cellulose, so we can't digest cellulose.

Ninad Baheti said: (Sep 27, 2015)  
Cellulose is present in plants. So we can't digest the cellulose.

Potien said: (Dec 24, 2015)  
It's just because, human body lacks cellulose enzymes to digest cellulose as the animals do!

Secondary, human's lack the four chambers as the animals do. Like cows this digestion is facilitated by those chambers.

Andrew said: (May 21, 2016)  
Cellulose are made up of beta glucose and human being have an alpha amylase.

Josephy Nkhata said: (Sep 20, 2016)  
Humans have no enzymes that can digest cellulose. Only animals like cows can digest cause they have cellulase enzyme.

Suadkhadija said: (Oct 26, 2016)  
Cellulose has beta 1-4 bonds between glucose molecule in humans there is no presence of beta 1-4 glucosidase enzyme which acts on such bonds.

Kennedy Ochieng Wasonga. said: (Dec 1, 2016)  
Even though cellulose cannot be digested by human beings due to the absence of cellulase enzyme in GIT, system there is lumbricoid which act upon them.

Tamrat said: (Jul 7, 2017)  
The enzyme present in human is @ (alpha) amylase which is specific to digest alpha 1-4 linkage, but the linkage in cellulose polysaccharide is Beta 1-4 linkage.

Ahmad said: (Oct 16, 2019)  
Nice! @Vipinvinny and @tamrat! You had exposed out what is actually in my mind.

Yeet said: (Mar 14, 2020)  
What? What does this even mean?

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