Comparative Embryology Quiz 1
- 1.The fertilization membrane develops during the first half of fertilization.
- A.
True
- B.
False
- 2.Chemotaxis is particularly important in aquatic organisms.
- A.
True
- B.
False
- 3.In sea urchins, the bindin-bindin receptor matching (recognition) occurs when the sperm contacts the vitelline envelope.
- A.
True
- B.
False
- 4.What happens during the first half of fertilization?
- A.
The sperm cell finds the egg
- B.
The sperm cell penetrates the barriers
- C.
The egg takes steps to prevent polyspermy
- D.
A and b above
- E.
All of the above
- 5.Which is/are true about the acrosomal reaction?
- A.
It occurs in sea urchins.
- B.
It penetrates the vitelline envelope.
- C.
It allows the sperm to pass through the oocyte cell membrane.
- D.
A and b above
- E.
All of the above
- 6.Which is the last of the those steps listed below?
- A.
Binding to vitelline envelope
- B.
Acrosomal reaction
- C.
Penetration of jelly layer
- D.
Chemotaxis
- E.
Binding to the oocyte cell membrane
- 7.Bindin receptors are
- A.
Needed for a highly species-specific step
- B.
On the surface of the vitelline envelope
- C.
What attracts the sea urchin sperm toward the egg
- D.
A and b above
- E.
All of the above
- 8.The ________ is/are not part of a sea urchin egg.
- A.
Vitelline envelope
- B.
Cumulus layer
- C.
Cell membrane
- D.
Cortical granules
- E.
Nucleus
- 9.Which of the following processes has the latest control?
- A.
Acrosome reaction
- B.
Bindin-bindin receptor recognition
- C.
Contact between oocyte and sperm cell membranes
- D.
Chemotaxis
- E.
None of the above are equally species-specific
- 10.Which of the following is/are not found in the mature sperm cell?
- A.
Cortical granules
- B.
Acrosome
- C.
Tail
- D.
A and b above
- E.
All of the above
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