.The process of fusion of male and female nuclei is known as
1.Amphimixis
2.Apomixis
3.Paramixis
4.Perimixis
By what process fertilizing molecules causes the clumping of sperms during fertilization
1.Rheotaxis
2.Thigmotaxis
3.Chemotaxis
4.Phototaxis
During activation which parts of the sperm enter through the fertilization cone
1.Entire sperm
2.Nucleus only
3.Middle piece only
4.Both nucleus and middle piece
During fertilization polyspermy is prevented by
1.Fertilizing
2.Anti fertilizing
3.Spermlysin
4.Fertilization membrane
External fertilization is common in
1.Terrestrial animals
2.Aquatic animals
3.Oviparous animals
4.Viviparous animals
Fertilization cone is formed during the
1.Meeting of the gametes
2.Penetration of the sperm
3.Activation of the egg
4.Amphimixis
Fertilization cone is formed from the
1.Sperm cytoplasm
2.Egg cytoplasm
3.Sperm nucleus
4.Egg nucleus
Fertilization membrane is formed form the
1.Cell membrane
2.Cell wall
3.Plasma membrane
4.Vitelline membrane
Fertilization membrane is formed to
1.Protect the ovum from shock
2.Protect the inclusion of many ova
3.Protect the ovum from radiation
4.Protect polyspermy
In mammals egg follicular cells are held together by a substance called
1.Malonic acid
2.Malic acid
3.Hyaluronic acid
4.Fumeric acid
Perivitelline space is formed between
1.Cell wall and vitelline membrane
2.Plasma membrane and vitelline membrane
3.Plasma membrane and fertilization membrane
4.Fertilization membrane and vitelline membrane
Sperm produces lytic substance called
1.Hyaloplasm
2.Hyaluronidase
3.Hyaluronic acid
4.Hyalonema
The angle of rotation of the egg in fertilization is
1.180 cel
2.90 cel
3.120 cel
4.360 cel
The enzymes secreted by the sperm to penetrate the egg membrane is
1.Exopeptidase
2.Succinic dehydrogenase
3.Hyaluronidase
4.Carbonic anhydrase
The fertilization membrane is formed by
1.The cortex of the cytoplasm
2.The fusion of cortical granules with inner surface of the membrane
3.The fusion of cortical granules with outer surface of the membrane
4.The fusion of inner surface of the membrane with the outer surface of the membrane
The function of fertilization membrane is to
1.Protect the egg
2.Prevent the entrance of other sperm into ovum
3.Attract the sperm
4.Secrete fertilizing
The lytic enzymes called hyaluronidase is found in the
1.Amphioxus egg
2.Frog�s egg
3.Reptilian egg
4.Mammalian egg
The lytic substance produced by sperm to dissolve the egg membrane in mammal is membranes is
1.Enterokinase
2.Hyaluronidase
3.Carbonic anhydrase
4.Lipase
The membrane which is helpful in avoiding the entry of man poly sperm is
1.Vitelline membrane
2.Perivitelline membrane
3.Fertilization membrane
4.Plasma membrane
The term amphimixis refers to the5.
1.Mixing of maternal and paternal cytoplasm
2.Joining of cell membranes of sperm and egg
3.Mixing of paternal and maternal chromosomes
4.Fusion of male centriole and female centriole
Which causes the clumping of sperms over the egg surface
1.Fertilizing
2.Luciferin
3.Anti fertilizing
4.Zymogen
Which of the following show the external fertilization
1.Fishes
2.Reptiles
3.Birds
4.Mammals