Question
Biology Question on Post-Fertilisation : Structures And Events
Aleurone layer is part of
A
endosperm
B
embryo
C
tegmen
D
testa
Answer
endosperm
Explanation
Solution
The outermost protein layer of the endosperm of grass fruits (e.g. cereal grains) is aleurone. At germination the embryo produces gibberellin, which stimulates the aleurone layer to synthesise enzymes, especially a-amylase. The latter causes hydrolysis of the starch in the endosperm. The enzymes are synthesised from the amino acids supplied by breakdown o f aleurone grains.