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 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
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