MCQ ON OVUM class 12 for NEET

MCQ ON OVUM class 12 for NEET | OVUM class 12 | MCQ OVUM with Answer | Check the below NCERT MCQ question for class 12 Biology based on the with Answers.

MCQ on OVUM class 12 Biology with answers were prepared based on the latest pattern. We have provided class 12 Biology MCQs questions on OVUM with Answers to help students understand the concept very well.

MCQ ON OVUM is useful for NEET / CSIR / UGC / CBSE / ICSE / AIIMS / EXAM / AFMC EXAM / STATE LEVEL MEDICAL EXAM 2022-23, 2023-24

Introduction:-
Human egg or ovum is noncleidoic and alecithal., rounded female gamete having a diameter of 100 micrometer. The ovum possess three coverings – inner plasma membrane, middle glycoprotein zona pellucida and outer cellular corona radiata with radially elongated scattered cells held in mucopolysaccharides (hyaluronic acid).Zola pellucida carries compatibility receptor proteins collectively called fertilizin.In between plasma membrane and zona pellucida is perivitelline space in which one polar body is present towards animal pole.The opposite end is vegetal pole.Cytoplasm of ovum is called ooplasm.It has a large nucleus or germinal vesicle.Typical nucleus or pronucleus is formed only at a time of fertilization.Prior to it ,same is generally in the stage of metaphase II . Ectoplasm possess mucopolysaccharides granules and microtubules.

MCQ ON OVUM class 12 for NEET

1. The glycoprotein fertilizin is secreted by

(a) ovum
(b) ovary
(c) sperm
(d) testis

Ans (a) ovum

2. Eggs produced in year by an ovary of non pregnant women is

(a) 12
(b) 6
(c) 24
(d) 48

Ans. (b) 6

3. An egg is released and fertilised by sperm at which stage ?

(a) primary oocyte
(b) secondary oocyte
(c) oogonium
(d) ovum

Ans. (b) Secondary oocytes

4. Cytoplasm of ovum does not possess

(a) Golgi complex
(b) Mitochondria
(c) Centrosome
(d) Ribosomes

Ans.(c) centrosome

5.Fertilization of ovum occurs in

(a) fimbriae of oviduct
(b) isthmus of oviduct
(c) ampulla of oviduct
(d) none of the above

Ans.(c) ampulla of oviduct

6. Release of second polar body from human eggs occurs in

(a) after entry of sperm
(b) after fertilisaton
(c) before sperm entry
(d) with no relation to sperm entry

Ans.(a) after entry of sperm

7. Ovulation occurs in

(a) ovary
(b) about 14th day
(c) Both a and b
(d) none of these

Ans.(c) both a and b

8. Microlecithal eggs are characterized by

(a) little yolk
(b) abundant yolk
(c) entry of sperm
(d) pattern of cleavage

Ans.(b) abundant yolk

9. In human females , ova are produced by

(a) ovarian follicles
(b) oviduct
(c) uterus
(d) vagina

Ans. (a) ovarian follicles

10.The thick layer which immediately surrounds the ovum

(a) zona pellucida
(b) membrane granulosa
(c) corona radiata
(d) theca interna

Ans. (a) zona pellucida

11. The outer cellular layer of ovum is

(a) corona radiata
(b) zona pellucida
(c) alecithal
(d) all the above

Ans.(a) corona radiata

12. Which carries compatibility receptor proteins collectively called

(a) fertilizin
(b) vegetal pole
(c) germinal vesicles
(d) centriole

Ans . (a) fertilizin

13. In between plasma membrane and zona pellucida is perivitelline space in which one polar body is present toward…

(a) head
(b) animal pole
(c) vegetal pole
(d) tail/flagellum

Ans.(b) animal pole

14. Cytoplasm of ovum is called

(a) ooplasm
(b) vegetal pole
(c) animal pole
(d) cortical granules

Ans. (a) ooplasm

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15.Typical nucleus or pronucleus is formed only at the time of

(a) Ovaluation
(b) fertilisaton
(c) Sperm
(d) capacitation

Ans.(b) fertilisaton

16. Vitelline membrane secreted by

(a) sperm
(b) ovum
(c) zona pellucida
(d) corona radiata

Ans.(b) ovum