MCQ ON MENSTRUAL CYCLE

MCQ ON MENSTRUAL CYCLE/ MCQ ON FERTLISATION AND IMPLANTATION / MCQ ON PREGNANCY AND EMBRYONIC DEVELOPMENT class 12 for NEET | MENSTRUAL CYCLES class 12 | MCQ MENSTRUAL CYCLE/ MCQ ON FERTLISATION AND IMPLANTATION/ MCQ ON FERTLISATION AND EMBRYONIC DEVELOPMENT with Answer | Check the below NCERT MCQ question for class 12 Biology chapter 03 based on the with Answers.

MCQ ON MENSTRUAL CYCLE

MCQ ON MENSTRUAL CYCLE

MCQ on MENSTRUATION CYCLE / MCQ ON FERTLISATION AND IMPLANTATION / MCQ ON PREGNANCY AND EMBRYONIC DEVELOPMENT class 12 Biology with answers were prepared based on the latest pattern.We have provided class 12 Biology MCQs questions on MENSTRUATION CYCLE/ FERTILISATON AND IMPLANTATION/ PREGNANCY AND EMBRYONIC DEVELOPMENT with Answers to help students understand the concept very well.

MCQ ON MENSTRUAL CYCLE/ MCQ ON FERTLISATION AND IMPLANTATION/ MCQ ON PREGNANCY AND EMBRYONIC DEVELOPMENT is useful for NEET / CSIR / UGC / CBSE / ICSE / AIIMS / EXAM / AFMC EXAM / STATE LEVEL MEDICAL EXAM 2022-23, 2023-24

Introduction:-
Mammals are unisexual . The reproductive system of each sex consists of many organs .There is a distinct sexual dimorphism.Males visibly differ from females in physical standards, external genital organs and accessory sex characters.All you are aware , humans are sexually reproducing and viviparous.Repriductive events occur after puberty.
The female reproductive system consists of a pair of ovaries alongwith a pair of oviducts , uterus, cervix, vagina and the external genitalia located in the pelvic region.

 

MCQ ON MENSTRUAL CYCLE/MCQ ON FERTILISATON AND IMPLANTATION/ MCQ ON PREGNANCY AND EMBRYONIC DEVELOPMENT class 11 for NEET

1. The reproductive cycle in the female primates (e.g. monkeys , apes and human beings) is called

(a) menstrual cycle
(b) ovums
(c) oestrous cycle
(d) both b and c

Ans (a) menstrual cycle

2. The first menstruation begins at puberty and is called

(a) menarche
(b) menopause
(c) both a and b
(d) mammary lobes

Ans. (a) menarche

3. In human females, menstruation is repeated at an average interval of about ……days.

(a) 26/27 days
(b) 28/29 days
(c) 30/31 days
(d) 32/33 days

Ans. (b) 28/29 days

4. Menstruation cycle starts with the menstrual phase , when menstruation flow occurs and it lasts for ……….days.

(a) 2-3 days
(b) 3-5 days
(c) 4-5 days
(d) 5-6 days

Ans.(b) 3-5 days

5. Menstruation cycle only occurs if

(a) the released ovum is fertilized.
(b) the released ovum is not fertlized
(c) fertilization takes place
(d) none of the above

Ans.(b) the realised ovum is not fertlized.

6. Lack of menstruation may be indicative of

(a) lectation
(b) pregnancy
(c) fertlisation
(d) menopause

Ans.(b) pregnancy

7. Both LH and FSH attain a peak level in the about

(a) 12th day
(b) 13th day
(c) 14th day
(d) 15th day

Ans.(c) 14th day

8. The hormone secreted by corpus luteum

(a) testerone
(b) progesterone
(c) thyroxin
(d) cortisol

Ans.(b) progesterone

9.In human beings , menstruatual cycles ceases around ……..of age

(a) 50 years
(b) 40 years
(c) 45 years
(d) 30 years

Ans. (a) 50 years

10.The estrous cycle is a characteristic of

(a) human males only
(b) mammalian males other than primates
(c) human females only
(d) mammalian females other than primates

Ans. (b) mammalian females other than primates

11.When do the three germinal layers differentiated?

(a) blastula
(b) gastrula
(c) cleavage
(d) fertilization

Ans.(b) gastrula

12. Which one develops from the ectoderm?

(a) adrenal cortex
(b) adrenal medulla
(c) blood
(d) lymph

Ans . (b) adrenal medulla

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13. Which is derived from ectoderm?

(a) epidermis
(b) spinal cord
(c) retina
(d) all of these

Ans.(d) all the above

15. During cleavage , nucleocytoplasmic ratio

(a) decrease
(b) increases
(c) remains same
(d) none of the above

Ans. (b) increase

16. Preparation of sperm before penetration of ovum is

(a) spermation
(b) coition
(c) insemination
(d) capacitation

Ans.(d) capacitation

17. The correct sequence in the process of development is

(a) cleavage-zygote-fertization-morula-blastula-gastrula
(b) fertilization-zygote-cleavage-morula-blastula-gastrula
(c) fertilization-cleavage-morula-zygote-gastrula
(d) fertilization-zygote-blastula-morula-cleavage-gastrula

Ans.(b) fertization-zygote-cleavage-morula-blastula-gastrula

18. Third cleavage in frog’s development is

(a) equatorial
(b) vertical
(c) latitudinal
(d) none of these

And.(c) latitudinal

19. The fertlisation takes place in

(a) uterus
(b) fallopian tube
(c) labia minora
(d) zona pellucida

Ans. (b) fallopian tube

20.The process of fusion of a sperm with an ovum is called

(a) fertilisaton
(b) menopause
(c) lactiferous duct
(d) antrum

Ans.(a) fertilisaton

21. During fertilisaton , a sperm comes in contact with the ……….layer of the ovum
ta
(a) zona pellucida
(b) mammary duct
(c) acrosome
(d) uterus

Ans. (a) zona pellucida

22. The mitotic division starts towards the uterus and forms of the oviduct called …………… towards the uterus.
(a) blastula
(b) gastrula
(c) cleavage
(d) zygote

23. The embryo with 8 to 16 blastomeres is called a
(a) morula
(b) blastula
(c) gastrula
(d) all the above

Ans. (a) morula

24. The morula continues to divide and transform into…….
(a) gastrocytes
(b) blastocysts
(c) trophoblasts
(d) inner cell mass

Ans. (b) blastocysts

25.The blastomeres in the blastocysts are arranged into an outer layer called
(a) inner cell mass
(b) trophoblasts
(c) implementation
(d) morula

Ans. (b) trophoblasts

26.An inner group of cells attached to trophoblasts called
(a) inner cell mass
(b) trophoblasts
(c) implementation
(d) blastula

Ans. (a) inner cell mass

27. The blastocysts become embedded in the endometrium of the uterus .This is called
(a) inner cell mass
(b) implantation
(c) chorionic villi
(d) trophoblasts

Ans.(b) implantation

28. After implantation , finger – like projection appear on the trophoblasts called

(a) chorionic villi
(b) inner cell mass
(c) trophoblasts
(d) implantation

Ans.(a) chorionic villi

29. The hormones produced by placenta
(a) hCG
(b) hPL
(c) estrogen and progesterone
(d) all the above
Ans.(d) all the above

30. Relaxin hormone is secreted by
(a) testes
(b) ovary
(c) placenta
(d) all the above

Ans.(b) ovary

About the author

Balram Saw

My name is Balram Saw and by profession, I am a lecturer. I did my masters in M.sc Zoology. On this blog, I share all the information related to biology.

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