General Studies: Biology Reproduction ke liye free mock test: 28 questions, timer, negative marking aur explanation ke saath. Koi login nahi, koi payment nahi — turant shuru karein.
General Studies: Biology Reproduction ke liye ye 28 questions ka practice set General Knowledge pattern par banaya gaya hai. Test me 45 second per question ka timer hai aur har galat answer par 0.25 marks kate jaate hain — bilkul asli exam jaisa. Submit karne ke baad aapko exact score, accuracy aur har question ka explanation milta hai. Bihar ke competitive exams (BPSC, BSSC, Bihar Police, BTSC) ki tayari karne wale students ke liye.
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Which prophylactic vaccine is administered to females to prevent Cervical and Uterine cancers caused by oncogenic viruses?
महिलाओं में गर्भाशय ग्रीवा (Cervical Cancer) के कैंसर को रोकने के लिए कौन सी वैक्सीन दी जाती है?
(A) BCG
(B) DPT
(C) Human Papillomavirus (HPV) Vaccine
(D) Oral Polio Vaccine
✅ Answer & Explanation
Sahi jawab: C) Human Papillomavirus (HPV) VaccineExplanation: HPV vaccine Human Papillomavirus ke high-risk strains se bachati hai, jo females me hone wale lagbhag 90% cervical cancer ka main kaaran hote hain.
What is the primary physiological function of the temporary discoid organ termed the 'Placenta' during gestation?
गर्भावस्था के दौरान 'प्लेसेंटा' (अपरा) का प्राथमिक शारीरिक कार्य क्या होता है?
(A) Fetal neurogenesis only
(B) Nutrient, respiratory gas exchange, and metabolic waste removal between maternal and fetal blood
(C) Synthesis of epidermal keratin
(D) Initiating fetal bone ossification
✅ Answer & Explanation
Sahi jawab: B) Nutrient, respiratory gas exchange, and metabolic waste removal between maternal and fetal bloodExplanation: Placenta maa aur bache ke beech ek bridge ka kaam karta hai jo bache ko oxygen aur nutrients supply karta hai aur fetal waste (CO2/urea) ko bahar nikaalta hai.
The specialized, clear fluid filling the membranous sac that physically cushions the fetus against mechanical trauma in the womb is:
गर्भ में भ्रूण को बाहरी आघातों और झटकों से बचाने वाला थैली के अंदर भरा द्रव क्या कहलाता है?
(A) Chyle fluid
(B) Amniotic Fluid
(C) Cerebrospinal fluid
(D) Peritoneal transudate
✅ Answer & Explanation
Sahi jawab: B) Amniotic FluidExplanation: Amniotic sac ke andar bhara Amniotic Fluid bache ke chaaron taraf ek shock absorber gaddi ki tarah kaam karta hai aur bache ko float karne me madad karta hai.
Which neurohypophyseal peptide hormone stimulates milk ejection ('let-down reflex') from alveolar mammary myoepithelial cells?
स्तन ग्रंथियों से दूध के निष्कासन (Milk Ejection) को उत्तेजित करने वाला मुख्य हार्मोन कौन सा है?
(A) Prolactin
(B) Oxytocin
(C) Estrogen
(D) Progesterone
✅ Answer & Explanation
Sahi jawab: B) OxytocinExplanation: Prolactin milk ko banata (produce) hai, jabki Oxytocin suckling ke time mammary glands ki muscles ko contract karke milk ko eject (bahar nikaalne) ka kaam karta hai.
Reproductive steroid hormones (Estrogen, Progesterone, Testosterone) synthesized by gonads are chemically derived from which precursor?
जनन ग्रंथियों (गोनाड) द्वारा निर्मित सभी लिंग हार्मोन रासायनिक रूप से किससे संश्लेषित होते हैं?
(A) Polypeptide chains
(B) Cholesterol (Steroid backbone)
(C) Monosaccharide hexoses
(D) Purine nucleotides
✅ Answer & Explanation
Sahi jawab: B) Cholesterol (Steroid backbone)Explanation: Testosterone, Estrogen aur Progesterone sabhi lipid-soluble Steroid hormones hain, jinka basic chemical foundation Cholesterol hota hai.
In the human female reproductive system, natural biological 'Fertilization' (syngamy) takes place in the:
मानव मादा प्रजनन तंत्र में प्राकृतिक 'निषेचन' (शुक्राणु और अंडाणु का मिलन) आमतौर पर कहाँ संपन्न होता है?
(A) Uterine fundus
(B) Fallopian Tube (Ampulla)
(C) Ovarian stroma
(D) Cervical canal
✅ Answer & Explanation
Sahi jawab: B) Fallopian Tube (Ampulla)Explanation: Sperm aur Ovum ka actual fusion Fallopian Tube ke Ampullary region me hota hai; iske baad banna hua zygote travel karke uterus me implant hota hai.
Which primary androgen synthesized by testicular Leydig cells drives the development of male secondary sexual characteristics?
वृषण की लेडिग कोशिकाओं द्वारा निर्मित कौन सा मुख्य पुरुष हार्मोन दाढ़ी, मूंछ और भारी आवाज जैसे लक्षणों के लिए जिम्मेदार है?
(A) Estrogen
(B) Progesterone
(C) Testosterone
(D) Luteinizing hormone
✅ Answer & Explanation
Sahi jawab: C) TestosteroneExplanation: Testosterone male primary sex hormone hai jo sperm production chalata hai aur facial hair, deep voice aur muscle mass jaise male traits develop karta hai.
The primary reproductive organs that produce haploid gametes and sex steroids (Testes in males, Ovaries in females) are biologically termed:
युग्मक (Gametes) और सेक्स हार्मोन उत्पन्न करने वाले प्राथमिक जनन अंगों (वृषण और अंडाशय) का जैविक नाम क्या है?
(A) Adrenals
(B) Gonads
(C) Visceral mesenteries
(D) Hypophyses
✅ Answer & Explanation
Sahi jawab: B) GonadsExplanation: Primary reproductive organs ko Gonads kehte hain: males me Testes (jo sperm banate hain) aur females me Ovaries (jo ova banate hain).
Which steroid hormone secreted by the corpus luteum and placenta is termed the 'Pregnancy Hormone' for sustaining the endometrium?
गर्भाशय की परत को बनाए रखने और गर्भपात को रोकने वाला मुख्य 'गर्भावस्था हार्मोन' कौन सा है?
(A) Estrogen
(B) Progesterone
(C) Oxytocin
(D) Prolactin
✅ Answer & Explanation
Sahi jawab: B) ProgesteroneExplanation: Progesterone uterine lining (endometrium) ko mota aur vascular banaye rakhta hai; agar iska level gir jaye to pregnancy sustain nahi ho pati aur miscarriage ho jata hai.
Which hormone secreted by the placenta and ovary relaxes pubic symphysis fibrocartilage and dilates the cervix during parturition?
सामान्य प्रसव के लिए श्रोणि के स्नायुओं को ढीला और गर्भाशय ग्रीवा को लचीला बनाने वाला हार्मोन कौन सा है?
(A) Estrogen
(B) Relaxin
(C) Progesterone
(D) Thyroxine
✅ Answer & Explanation
Sahi jawab: B) RelaxinExplanation: Delivery ke time Relaxin hormone pelvic joints aur ligaments ko soft aur stretchable banata hai taaki birth canal khul sake aur normal delivery aasan ho.
Surgical permanent sterilization in females executed by transecting, cauterizing, or ligating the Fallopian tubes is:
मादा नसबंदी की वह स्थायी शल्य चिकित्सा विधि जिसमें फेलोपियन ट्यूब को काटा या बांधा जाता है, क्या कहलाती है?
(A) Vasectomy
(B) Tubectomy (Tubal Ligation)
(C) Hysterectomy
(D) Oophorectomy
✅ Answer & Explanation
Sahi jawab: B) Tubectomy (Tubal Ligation)Explanation: Tubectomy me fallopian tubes ko block kar diya jata hai taaki ovum sperm se na mil sake; ye females ke liye permanent contraceptive method hai.
The minor surgical contraceptive procedure in human males involving bilateral excision and ligation of the Vas Deferens is:
पुरुषों में नसबंदी की वह छोटी शल्य प्रक्रिया जिसमें शुक्रवाहिका (Vas Deferens) को काटा या बांधा जाता है, क्या कहलाती है?
(A) Tubectomy
(B) Vasectomy
(C) Castration
(D) Prostatectomy
✅ Answer & Explanation
Sahi jawab: B) VasectomyExplanation: Vasectomy me Vas Deferens nali ko baandh kar cut kar dete hain; iske baad semen to nikalta hai par usme sperm nahi hote, jisse pregnancy nahi ho sakti.
Which accessory male exocrine gland surrounds the proximal urethra, regulating ejaculate fluid volume and urinary flow?
पुरुषों में मूत्राशय के आधार पर मूत्रमार्ग को घेरने वाली कौन सी ग्रंथि वीर्य के क्षारीय द्रव का स्राव करती है?
(A) Bulbourethral gland
(B) Seminal vesicle
(C) Prostate Gland
(D) Adrenal gland
✅ Answer & Explanation
Sahi jawab: C) Prostate GlandExplanation: Prostate gland male urethra ke charon taraf hoti hai; ye sperm ko activate karne ke liye alkaline fluid banati hai aur peshab wa virya ke valve ka kaam karti hai.
The thick, transparent, non-cellular glycoprotein coat immediately enveloping the mammalian primary oocyte is the:
अंडाणु (Ovum) को सीधे घेरने वाली पारदर्शी सुरक्षात्मक ग्लाइकोप्रोटीन परत क्या कहलाती है जिसे केवल एक शुक्राणु भेद सकता है?
(A) Corona Radiata
(B) Zona Pellucida
(C) Vitelline membrane
(D) Theca interna
✅ Answer & Explanation
Sahi jawab: B) Zona PellucidaExplanation: Zona Pellucida ovum ki primary protective coat hai; jab pehla sperm ise pierce karta hai to ye achanak hard ho jati hai taaki doosra sperm andar na ghus sake (polyspermy block).
The outer cellular layer of radiating granulosa cells surrounding the unfertilized mammalian ovum is the:
अंडाणु के सबसे बाहरी आवरण में स्थित फॉलिक्यूलर कोशिकाओं की सुरक्षात्मक परत को क्या कहा जाता है?
(A) Zona Pellucida
(B) Corona Radiata
(C) Perivitelline space
(D) Amnion
✅ Answer & Explanation
Sahi jawab: B) Corona RadiataExplanation: Corona Radiata ovum ki sabse outer layer hai jo granulosa cells se bani hoti hai; sperm ka acrosome apne hyaluronidase enzyme se pehle ise dissolve karta hai.
At what gestational milestone does the developing human conceptus transition from being termed an 'Embryo' to a 'Fetus'?
गर्भावस्था के किस सप्ताह के बाद गर्भस्थ शिशु को 'एम्ब्रायो' के स्थान पर 'फीटस' (Fetus) कहा जाता है?
(A) Immediately after fertilization
(B) From the 9th gestational week until birth (after organogenesis)
(C) Only during the final month
(D) At the 3rd postnatal day
✅ Answer & Explanation
Sahi jawab: B) From the 9th gestational week until birth (after organogenesis)Explanation: Shuru ke 8 hafte tak jab basic organs ban rahe hote hain to Embryo kehte hain; 9th week se jab sabhi body parts pehchane ja sakein tab use Fetus bola jata hai.
The natural, permanent cessation of female follicular activity and menstrual cycles typically occurring between ages 45 and 55 is:
महिलाओं में उम्र बढ़ने के साथ मासिक धर्म चक्र का स्थायी रूप से बंद हो जाना क्या कहलाता है?
(A) Menarche
(B) Menopause (Rajonivritti)
(C) Amenorrhea
(D) Dysmenorrhea
✅ Answer & Explanation
Sahi jawab: B) Menopause (Rajonivritti)Explanation: Menopause (Rajonivritti) lagbhag 45-50 saal ki umar me hota hai jab ovaries me eggs khatam ho jate hain aur estrogen level girne se menstrual cycles permanently band ho jati hain.
The biological process wherein a blastocyst adheres to and burrows into the secretory endometrium of the uterus is:
निषेचन के बाद ब्लास्टोसिस्ट का गर्भाशय की आंतरिक दीवार में धंसने और जुड़ने की क्रिया क्या कहलाती है?
(A) Fertilization
(B) Implantation (Pratyaropan)
(C) Ovulation
(D) Gastrulation
✅ Answer & Explanation
Sahi jawab: B) Implantation (Pratyaropan)Explanation: Fertilization ke lagbhag 6-7 din baad blastocyst uterus ki deewar se chipak kar uske andar embed ho jata hai; is process ko Implantation kehte hain.
Monozygotic (Identical) twins result genetically from which embryonic event?
समान (Identical) जुड़वाँ बच्चे आनुवंशिक रूप से किस प्रकार उत्पन्न होते हैं?
(A) Simultaneous fertilization of two separate ova by two different sperm
(B) A single fertilized ovum (zygote) completely cleaving into two independent embryonic cell masses
(C) A single ovum fertilized by two spermatozoa simultaneously
(D) Replication of the maternal uterus
✅ Answer & Explanation
Sahi jawab: B) A single fertilized ovum (zygote) completely cleaving into two independent embryonic cell massesExplanation: Identical twins tab bante hain jab 1 single egg aur 1 single sperm se bana zygote shuruati division me 2 alag embryos me split ho jata hai; inka DNA 100% same hota hai.
Dizygotic (Fraternal) twins, who may be of different sexes and share only typical sibling genetic similarity, arise from:
गैर-समान (Fraternal) जुड़वाँ बच्चे, जो लड़का और लड़की दोनों हो सकते हैं, कैसे उत्पन्न होते हैं?
(A) One egg dividing post-implantation
(B) Two independent ova ovulated simultaneously and fertilized by two distinct spermatozoa
(C) Asexual fission of the morula
(D) Chromosomal duplication
✅ Answer & Explanation
Sahi jawab: B) Two independent ova ovulated simultaneously and fertilized by two distinct spermatozoaExplanation: Fraternal twins tab hote hain jab ovaries se galti se 2 alag eggs nikalte hain aur 2 alag sperm unhe fertilize karte hain; ye aam bhai-behan jaise hi alag-alag dikhte hain.
The vascular connective stalk linking the fetal navel to the maternal placenta containing two arteries and one vein is the:
भ्रूण की नाभि को प्लेसेंटा से जोड़ने वाली रक्त वाहिकाओं युक्त जीवन रेखा क्या कहलाती है?
(A) Fallopian tube
(B) Umbilical Cord (Garbhanaal)
(C) Urachus
(D) Vas deferens
✅ Answer & Explanation
Sahi jawab: B) Umbilical Cord (Garbhanaal)Explanation: Umbilical Cord (Garbhanaal) bache ki naabhi ko placenta se jodti hai; isme do arteries deoxygenated blood le jati hain aur ek vein fresh oxygenated blood bache ko deti hai.
Why are the mammalian testes situated extra-abdominally within the external pendulous scrotal sac?
पुरुषों में वृषण (Testes) उदर गुहा के बाहर अंडकोश की थैली (Scrotum) में क्यों स्थित होते हैं?
(A) To shield the testes from physical digestive pressure
(B) To maintain a localized temperature 2 to 2.5°C lower than core body temperature for viable spermatogenesis
(C) To accelerate testosterone breakdown
(D) To facilitate micturition reflexes
✅ Answer & Explanation
Sahi jawab: B) To maintain a localized temperature 2 to 2.5°C lower than core body temperature for viable spermatogenesisExplanation: Sperm production ke liye normal body temperature (37°C) bohot garam hota hai; Scrotum bahar reh kar temperature ko 2-2.5°C thanda rakhta hai taaki healthy sperm ban sakein.
Surgical complete removal of the human uterus is clinically termed a:
फाइब्रॉएड या गंभीर संक्रमण के कारण पूरे गर्भाशय (Uterus) को शल्य चिकित्सा द्वारा निकाल देना क्या कहलाता है?
(A) Tubectomy
(B) Hysterectomy
(C) Mastectomy
(D) Oophorectomy
✅ Answer & Explanation
Sahi jawab: B) HysterectomyExplanation: Uterus ko surgically poora nikaalne ke procedure ko Hysterectomy kehte hain; jabki ovaries nikaalne ko Oophorectomy aur fallopian tube kaatne ko Tubectomy bolte hain.
In human embryonic organogenesis, which functional internal organ starts beating rhythmically first (around 4-6 gestational weeks)?
गर्भावस्था के 4 से 6 सप्ताह के भीतर सबसे पहले कार्य करना शुरू करने वाला भ्रूण का आंतरिक अंग कौन सा है?
(A) Lungs
(B) Functional Embryonic Heart
(C) Metanephric Kidney
(D) Hepatic Lobules
✅ Answer & Explanation
Sahi jawab: B) Functional Embryonic HeartExplanation: Bache me sabse pehle dil (Heart) develop hokar pump karna shuru karta hai; lagbhag 5-6 week me ultrasound par fetal heart beat saaf suni ja sakti hai.
What characterizes the clinical assisted reproductive technology termed In Vitro Fertilization (IVF)?
परखनली शिशु तकनीक या आईवीएफ (IVF) में मुख्य प्रक्रिया क्या होती है?
(A) Gestation occurs completely inside an artificial glass incubator
(B) Ova are harvested and fertilized with sperm in vitro in a laboratory dish before transferring the embryo into the uterus
(C) Cloning somatic chromosomes directly into follicles
(D) Direct injection of hormones into ovaries only
✅ Answer & Explanation
Sahi jawab: B) Ova are harvested and fertilized with sperm in vitro in a laboratory dish before transferring the embryo into the uterusExplanation: IVF (Test Tube Baby) me egg aur sperm ko lab ke sterile dish me milakar fertilize karwaya jata hai, aur fir banay hue zygote/embryo ko wapas maa ke uterus me transfer karte hain.
The initial diploid single-cell structure formed by the complete fusion of a haploid sperm and ovum is the:
शुक्राणु और अंडाणु के सफल निषेचन के तुरंत बाद बनने वाली पहली द्विगुणित (Diploid) एकल कोशिका क्या कहलाती है?
(A) Morula
(B) Zygote (Yugmanaj)
(C) Blastocyst
(D) Embryo
✅ Answer & Explanation
Sahi jawab: B) Zygote (Yugmanaj)Explanation: Male aur female gametes ke milne par jo pehli 46-chromosomes wali single cell banti hai use Zygote kehte hain; yahi divide hokar morula aur aage chal kar insaan banta hai.
The cyclical surge of which anterior pituitary gonadotropic hormone on approximately day 14 triggers mature follicular rupture (Ovulation)?
मासिक धर्म चक्र के लगभग 14वें दिन किस हार्मोन का स्तर अचानक बढ़ने से अंडोत्सर्ग (Ovulation) होता है?
(A) Follicle Stimulating Hormone
(B) Luteinizing Hormone (LH Surge)
(C) Progesterone
(D) Prolactin
✅ Answer & Explanation
Sahi jawab: B) Luteinizing Hormone (LH Surge)Explanation: Cycle ke 14th day ke aas-paas Pituitary se achanak LH Surge hota hai jo Graafian follicle ko phod kar egg (ovum) ko fallopian tube me release karwata hai (Ovulation).
A contractual reproductive arrangement wherein a gestational carrier bears a pregnancy for intended parents is:
जब कोई महिला किसी अन्य दंपत्ति के लिए अपनी कोख में बच्चा पालती है, तो उसे क्या कहा जाता है?
(A) Foster parenting
(B) Surrogacy (Surrogate Mother)
(C) Adoption
(D) Artificial insemination
✅ Answer & Explanation
Sahi jawab: B) Surrogacy (Surrogate Mother)Explanation: Surrogacy me surrogate mother kisi aur couple ke embryo ko apne uterus me 9 mahine tak carry karti hai aur delivery ke baad bacha unke legal parents ko de diya jata hai.