Question
Arrange the following cell layers/structures around the female gamete, from outer to inner side : A. Zona pellucida B. Perivitelline space C. Corona radiata D. Plasma membrane of ovum Choose the correct answer from the options given below :
NEET
Zoology
Human Reproduction
2026
NEET 2026 (Cancelled)
NEET Zoology Question (2026) — Solution
Options
- A. D, B, A, C
- B. C, A, D, B
- C. C, A, B, D
- D. A, C, B, D
Answer
C. C, A, B, D
Step-by-step solution
The mature female gamete (ovum) is surrounded by several layers. From the outermost to the innermost side, the arrangement is as follows: Corona radiata: The outermost layer consisting of follicle cells. Zona pellucida: A non-cellular glycoprotein layer situated just inside the corona radiata. Perivitelline space: The narrow space between the zona pellucida and the plasma membrane of the ovum. Plasma membrane of ovum (Oolemma): The innermost boundary enclosing the cytoplasm of the ovum. Therefore, the correct sequence from outer to inner side is Corona radiata (C), Zona pellucida (A), Perivitelline space (B), and Plasma membrane of ovum (D). Answer: C, A, B, D
Related: Zoology — Human Reproduction · All PYQ Banks