NEETZoologyHuman Reproduction
Match List-I with List-II regarding the layers and structures of a mature human female gamete. List-I List-II A. Corona radiata I. Innermost cell membrane of the gamete B. Zona pellucida II. Non-cellular layer surrounding the secondary oocyte C. Perivitelline space III. Outer layer formed of follicle cells D. Oolemma IV. Narrow gap containing the first polar body Choose the correct answer from the options given below
Options
- AA-II, B-III, C-IV, D-I
- BA-III, B-I, C-IV, D-II
- CA-III, B-II, C-I, D-IV
- DA-III, B-II, C-IV, D-I
Correct answer
D. A-III, B-II, C-IV, D-I
Step-by-step solution
The mature female gamete is surrounded by several layers and spaces. Corona radiata (A) is the outermost cellular layer formed of follicle cells, thus matching with (III). Zona pellucida (B) is a non-cellular glycoprotein layer surrounding the secondary oocyte, thus matching with (II). Perivitelline space (C) is the narrow gap between the zona pellucida and the oolemma, where the first polar body is situated, thus matching with (IV). Oolemma (D) is the innermost plasma membrane of the ovum, thus matching with (I).