Question
Biology Question on Digestion and absorption
A person who is eating boiled potato, his food contains the component
A
cellulose which is digested by cellulase
B
starch which is not digested
C
lactose which is not digested
D
DNA which can be digested by pancreatic DNAase.
Answer
DNA which can be digested by pancreatic DNAase.
Explanation
Solution
Boiled potatoes do not contain lactose; and cellulose which is present is not digested in man as he lacks cellulase. Starch is the major food component which is present in boiled potato and is broken down into maltose and isomaltose due to' salivary amylase and is hence digested. DNA is broken down into purines, pyrimidines and sugars by pancreatic nuclease (such as DNAse).