Q. Egg secrets a chemical called …A… which is made up of …B… and sperm secretes a chemical called …C… made up of …D… The adhesion of sperm to the egg of same species through chemical recognition is called …E… . Here A to E refers to
A) A-fertilisin, B-glycoprotein, C-antifertilisin, D-protein, E-agglutination
B) A-fertilisin, B-glucose, C-antifertilisin, D- glucose, E-agglutination
C) A-fertilisin, B-fructose, C-antifertilisin, D- fructose, E-agglutination
D) A-fertilisin, B- protein, C-antifertilisin, D- glycoprotein, E-agglutination
Explanation
Fertilisin antifertilisin interaction was proposed by IR Lillie. According to this theory, ovum secretes fertilisin (composed of glycoprotein = monosaccharide + Amino acid) and sperm release antifertilisin (composed of acidic amino acid). They interact with each other and they are species specific. The adhesion of sperm to the egg of the same species through chemical recognition is known as agglutination
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.