Maybe this helps ? Please look at the picture
Maybe when your moms age when she started or maybe it just start
I believe its (B). Giving up a neutron
The diseases which can be passes down as genetic traits are known as "Inheritable disease" some examples are:
1) Haemophilia
2) Phenylketonuria
3) Down's Syndrome
4) Turner's Syndrome
5) Klinefelter's Syndrome
Hope this helps!
All mentioned complexes (receptor-hormone, antibody-antigen, enzyme-substate) are involved in a molecular recognition.The molecular recognition involves <span>non-covalent </span> interaction between molecules. To form complex, molecules must be complementary in shape and charges, and usually, they are compared to key and lock. This way, the selectivity and specificity of recognition between molecules are assured.