class12 se related questions ko ek jagah revise karein. Har question me bilingual content, answer feedback aur explanation available hai.
741 questions tagged with class12.
In blastocyst embryo proper develops from what?
A. Inner cell mass
Identify the concept: this is about blastocyst parts.
Inner cell mass later forms the embryo proper.
Exam tip: inner cell mass means future embryo.
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What is the outer layer of blastocyst called?
A. Trophoblast
Identify the concept: this is blastocyst structure.
The outer layer of blastocyst is called trophoblast and helps in placenta formation.
Exam tip: trophoblast is outside.
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Embedding of blastocyst into the uterine wall is called what?
A. Implantation
Identify the concept: this is related to beginning of pregnancy.
When the blastocyst embeds in the endometrium it is called implantation.
Exam tip: implantation means embryo fixing in uterus.
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After cleavage the solid ball like stage is called what?
A. Morula
Identify the concept: this is an embryo development stage.
After cleavage a solid ball of cells is called morula.
Exam tip: remember morula as a mulberry like solid ball.
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Repeated mitotic division of zygote is called what?
A. Cleavage
Identify the concept: this is early embryonic development.
Rapid mitotic divisions of zygote are called cleavage.
Exam tip: cleavage means early divisions without large growth.
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Which first cell is formed after fertilization?
A. Zygote
Identify the concept: this is result of fertilization.
Fusion of male and female gametes forms the zygote.
Exam tip: zygote is the first cell of a new individual.
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What happens to corpus luteum if fertilization does not occur?
A. यह degrade होकर corpus albicans बनता हैIt degenerates into corpus albicans
Identify the concept: this is the outcome in menstrual cycle.
If fertilization does not occur corpus luteum degenerates and becomes corpus albicans.
Exam tip: no pregnancy means regression of corpus luteum.
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Corpus luteum mainly secretes which hormone?
A. Progesterone
Identify the concept: this is about ovarian structure and hormone.
Corpus luteum secretes progesterone which helps maintain the endometrium.
Exam tip: remember corpus luteum with progesterone.
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Which hormone surge triggers ovulation?
B. LH surge
Identify the concept: this is hormonal control of ovulation.
LH surge triggers ovulation.
Exam tip: remember LH surge for ovulation.
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The menstrual cycle is considered to start with which phase?
A. Menstrual phase
Identify the concept: this is about phases of menstrual cycle.
Day 1 of the cycle is counted from menstrual bleeding so menstrual phase is the start.
Exam tip: day 1 means menstruation starts.
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The human menstrual cycle is considered about how many days on average?
C. 28 दिन28 days
Identify the concept: this is menstrual cycle duration.
The human menstrual cycle is generally considered about 28 days.
Exam tip: remember 28 days for average cycle length.
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A. अंडाशय से mature ovum का निकलनाRelease of mature ovum from ovary
Identify the concept: this is an event of menstrual cycle.
In ovulation a mature ovum is released from the ovary.
Exam tip: ovulation usually occurs around the middle of the cycle.
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Cervix is a part of which organ?
A. गर्भाशयUterus
Identify the concept: this is female reproductive tract.
Cervix is the narrow lower part of uterus that connects with the vagina.
Exam tip: remember cervix as the neck of uterus.
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What is the inner lining of uterus called?
B. Endometrium
Identify the concept: this is about uterine layers.
Endometrium is the inner lining of uterus and changes during the menstrual cycle.
Exam tip: endometrium is linked with implantation and menstruation.
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What is the simple Hindi name of uterus?
B. गर्भाशयWomb
Identify the concept: this is a female reproductive organ term.
Uterus is called womb and supports embryo development.
Exam tip: remember uterus as the pregnancy organ.
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Fallopian tube is also known as what?
A. Oviduct
Identify the concept: this is the female duct system.
Fallopian tube is also called oviduct and helps transport the egg.
Exam tip: remember Fallopian tube equals oviduct.
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Where does fertilization normally occur in the human female reproductive system?
C. फैलोपियन ट्यूब का ampulla-isthmus junctionAmpulla-isthmus junction of oviduct
Identify the concept: this is the site of fertilization.
In humans fertilization usually occurs at the ampulla-isthmus junction of the oviduct.
Exam tip: remember ampulla-isthmus junction as fertilization site.
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What is the main function of the tail of sperm?
A. Movement में सहायताHelps in movement
Identify the concept: this is function of sperm parts.
The tail helps sperm move through the female tract.
Exam tip: remember tail means movement.
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Which enzyme containing cap like structure is present in the head of sperm?
A. Acrosome
Identify the concept: this is sperm structure.
Acrosome is a cap like structure on the sperm head and contains enzymes.
Exam tip: acrosome helps penetrate egg coverings during fertilization.
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Which gland is a male accessory gland?
A. Prostate gland
Identify the concept: this is about male accessory glands.
Prostate gland is an accessory gland of the male reproductive system.
Exam tip: remember seminal vesicles prostate and bulbourethral glands together.
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B. शुक्राणु और accessory gland secretionsSperms and accessory gland secretions
Identify the concept: this is semen composition.
Semen contains sperms and secretions of glands such as seminal vesicles and prostate.
Exam tip: remember semen equals sperms plus fluid secretions.
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What is the main function of vas deferens?
A. शुक्राणुओं का transportTransport of sperms
Identify the concept: this is the male duct system.
Vas deferens transports sperms from epididymis onward.
Exam tip: remember vas deferens as a sperm carrying duct.
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Maturation and storage of sperms mainly occur where?
A. Epididymis
Identify the concept: this is about sperm pathway.
Sperms mature and are stored for some time in the epididymis.
Exam tip: connect epididymis with sperm storage and maturation.
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Leydig cells mainly produce which hormone?
B. Testosterone
Identify the concept: this is male hormone production.
Leydig cells in testes produce androgens mainly testosterone.
Exam tip: remember Leydig cells with testosterone.
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What is the main function of Sertoli cells?
A. शुक्राणु कोशिकाओं को पोषण देनाNourish sperm cells
Identify the concept: this is about cells of seminiferous tubules.
Sertoli cells support and nourish developing sperm cells.
Exam tip: remember Sertoli as support cells.
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In testes sperms are mainly formed in which structure?
B. सेमिनिफेरस नलिकाएंSeminiferous tubules
Identify the concept: this is about internal structure of testis.
Spermatogenesis occurs in the seminiferous tubules.
Exam tip: remember seminiferous tubules as the sperm formation site.
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What is the process of ovum formation called?
B. अंडजननOogenesis
Identify the concept: this is female gamete formation.
The process of formation of ovum is called oogenesis.
Exam tip: remember oogenesis for ovum formation.
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What is the process of sperm formation called?
B. शुक्रजननSpermatogenesis
Identify the concept: this is about gamete formation.
The process of formation of sperms is called spermatogenesis.
Exam tip: when you see sperm formation remember spermatogenesis.
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Testes are located outside the body in which sac?
A. अंडकोशScrotum
Identify the concept: this is about the position of testes.
Testes lie in the scrotum which helps maintain a lower suitable temperature for sperm formation.
Exam tip: scrotum helps in temperature control.
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In human females ova are produced in which organ?
B. अंडाशयOvary
Identify the concept: this is about the female reproductive system.
Ovaries produce ova and also secrete female hormones.
Exam tip: connect ovary with ova and hormones.
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