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Size of a Cell

The acros...

Question

The acrosome of the active spermatozoa releases __ (i) _ which digests the (ii) ___ membrane of the egg.

The information in which alternative completes the given statement?
A)
(i)

(ii)

acrosin

corona radiata

B)
(i)

(ii)

acrosin

zona pellucida

C)
(i)

(ii)

fertilin

zona pellucida

D)
(i)

(ii)

fertilin

corona radiata

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Solution

(i) acrosin (ii) zona pellucida

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Q. (a) Draw a diagram of the structure of a human ovum surrounded by corona radiata. Label the following parts:
(i) Ovum (ii) Plasma Membrane (iii) Zona Pellucida
(b) State the function of Zona Pellucida.

Q. Differentiate between :
Zona pellucida and corona radiata

Q. Match the following and choose the correct answer

A	Zona hatching	(i)	mitotic division of the zygote
B	Trophoblast	(ii)	embedding of the blastocyst in the endometrium
C	Cleavage	(iii)	blastocyst releasing from zona pellucida
D	Implantation	(iv)	outer layer of blastocyst attached to the endometrium

Q. Match the following columns and select the correct option.

	Column-I		Column-II
(a)	Placenta	(i)	Secrete testosterone in presence of LH
(b)	Zona pellucida	(ii)	Secretes hPL
(c)	Bulbourethral glands	(iii)	Secreted by secondary oocyte
(d)	Leydig cells	(iv)	Homologous to Bartholin's glands

Q. Match column I with column II and choose the correct option.

	Column I		Column II
(a)	Sertoli cells	(i)	Secrete androgens
(b)	Interstitial cells	(ii)	Provide nutrition to the germ cells
(c)	Placenta	(iii)	Structural and functional unit between foetus and maternal body
(d)	Zona pellucida	(iv)	Acellular layer formed by secondary oocyte

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