NCERT CLASS 12 | TOPIC : HUMAN REPRODUCTION | QB-2 | NEET BIOLOGY ONLINE TEST ~ Kalvisolai Online Test

NCERT CLASS 12 | TOPIC : HUMAN REPRODUCTION | QB-2 | NEET BIOLOGY ONLINE TEST

It contains 100 important questions. Choose the most correct answer. Then check your answer. Try again if there are errors. Regards : www.onlinetest.kalvisolai.com

1 ➤ 101. From the period of birth till puberty, which cells degenerate in ovary?

(a) Oogonia (b) Ova (c) Secondary follicle (d) Primary follicle

2 ➤ 102. The primary and secondary follicle are surrounded by cells known as

(a) Granulosa (b) Mucosa (c) Serosa (d) Granuloma

3 ➤ 103. The tertiary follicle in ovary is characterized by the presence of

(a) Fundus (b) Antrum (c) Vacuole (d) Cavity

4 ➤ 104. The mature tertiary follicle is also known as

(a) Ovum (b) Oogonia (c) Graafian follicle (d) Polar body

5 ➤ 105. The membrane around Graafian follicle is known as

(a) Zona fasciculata (b) Zona reticularis (c) Zona externa (d) Zona pellucida

6 ➤ 106. What is indicated by ‘b’ in the figure?

(a) Ovum (b) Cells of corona radiata (c) Perivitelline space (d) Zona pellucida

7 ➤ 107. What does ‘a’ represent in the figure?

(a) Cells of corona radiata (b) Sperm (c) Perivitelline space (d) Zona pellucida

8 ➤ 108. What does ‘c’ represent in the figure?

(a) Cells of corona radiata (b) Sperm (c) Perivitelline space (d) Zona pellucida

9 ➤ 109. The Graafian follicles release

(a) Secondary oocyte (b) Primary oocyte (c) Ovum (d) Both (a) and (b)

10 ➤ 110. The release of ovum from ovary is known as

(a) Ovulation (b) Oogenesis (c) Parturition (d) Gametogenesis

11 ➤ 111. Total number of polar bodies formed in oogenesis?

(a) 2 (b) 1 (c) 3 (d) 0

12 ➤ 112. The first menstruation which begins at puberty is called

(a) Menstrual cycle (b) Menarche (c) Oogenesis (d) Ovulation

13 ➤ 113. An average interval of menstrual cycle in females is about ____ days.

(a) 15/16 (b) 30/31 (c) 28/29 (d) 25/26

14 ➤ 114. One ovum is released during the ____ of each menstrual cycle.

(a) Initial (b) Middle (c) Terminal (d) Alternative

15 ➤ 115. What does ‘a’ represent in this figure?

(a) Blastocyst (b) Blastocyst implantation (c) Morula (d) Cells

16 ➤ 116. The menstrual flow in menstrual cycle lasts for about

(a) 6 to 7 days (b) Almost 7 days (c) 3 to 5 days (d) 1 to 2 days

17 ➤ 117. Lack of menstruation may be indicative of

(a) Pregnancy (b) Routine work stress (c) Poor health (d) All of these

18 ➤ 118. In females, gonadotropins attain a peak level at about ____ day of the menstrual cycle.

(a) 15th (b) 14th (c) 28th (d) 29th

19 ➤ 119. LH surge causes

(a) Rupture of graafian follicle (b) Release of ovum (c) Endometrial shedding (d) Both (a) and (b)

20 ➤ 120. The ovulation phase is followed by ____ phase.

(a) Gestation (b) Luteal (c) Menstrual (d) Oogenesis

21 ➤ 121. After ovulation, Graafian follicle transforms into

(a) Corpus cavernosa (b) Corpus pellucida (c) Corpus luteum (d) Corpus metrium

22 ➤ 122. Large amounts of progesterone is secreted by

(a) Corpus germinativum (b) Corpus luteum (c) Corpus cavernosa (d) Corpus pellucida

23 ➤ 123. If fertilization does not occur corpus luteum ____.

(a) Proliferates (b) Degenerates (c) Regenerates (d) Divides

24 ➤ 124. The stage in human female when menstrual cycle ceases at the age of 50 is known as

(a) Ovopause (b) Menarche (c) Menopause (d) Menstruation

25 ➤ 125. Once the sperm is injected into the female genital tract, which junction is primarily concerned with meeting of sperm with ovum?

(a) Utero-ampullary junction (b) Ampullary-isthmic junction (c) Isthmic-infundibullary junction (d) Uterine-cervical junction

26 ➤ 126. All copulations do not lead to pregnancy. The most appropriate reason to support this statement is

(a) The ovum and sperm should be transported randomly to ampullary-isthmic junction. (b) The ovum and sperm should be continuously transported to ampullary-isthmic junction. (c) The ovum and sperm should be simultaneously transported to ampullary- isthmic junction. (d) None of these

27 ➤ 127. The sperm comes into contact with the ____ layer of ovum to cause fertilization.

(a) Corona radiata (b) Perivitelline layer (c) Zona pellucida (d) Zona fasciculata

28 ➤ 128. Once a sperm fuses with an ovum, the remaining sperms cannot fertilize ovum. What changes are responsible for such phenomenon?

(a) Selective permeation through ovum. (b) Specific spatial arrangement of corona radiata cells. (c) Change in the membrane zona pellucida. (d) Ovum releases toxic substances thereby killing other sperms.

29 ➤ 129. After entry of sperm into cytoplasm of ovum which of the following event takes place?

(a) Mitotic division of secondary oocyte (b) Meiotic division of primary oocyte (c) Mitotic division of secondary oocyte (d) Meiotic division of secondary oocyte

30 ➤ 130. The human female has which of the following sex chromosome pattern?

(a) XX b) YY (c) XY (d) XYX

31 ➤ 131. The human male has which of the following sex chromosome pattern?

(a) XYX (b) XY (c) XX (d) YY

32 ➤ 132. Female produces only

(a) One type of gamete Y (b) One type of gamete X (c) Either X or Y type of gamete (d) All of these

33 ➤ 133. Scientifically, sex of the baby is determined by

(a) Only mother (b) Only father (c) Either mother or father (d) Gestational phase

34 ➤ 134. After formation of zygote, it cleaves into 2, 4, 8, 16 daughter cells called

(a) Blastocyst (b) Morula (c) Trophoblast (d) Blastomere

35 ➤ 135. What does ‘b’ represent?

(a) LH (b) Pituitary (c) Menses (d) Ovarian

36 ➤ 136. What is indicated by ‘d’ in the figure?

(a) Estrogen (b) Pituitary (c) LH (d) Menses

37 ➤ 137. What does ‘c’ represent in the figure?

(a) LH (b) Pituitary (c) Menses (d) Ovarian

38 ➤ 138. What is indicated by ‘a’ in the figure?

(a) Oestrogen (b) Menses (c) Pituitary (d) Progesterone

39 ➤ 139. The embryo with 23 or 42 blastomeres is known as

(a) Blastocyst (b) Morula (c) Trophoblast (d) Zygote

40 ➤ 140. Morula divides and transforms into

(a) Inner cell mass (b) Blastocyst (c) Trophoblast (d) Blastomere

41 ➤ 141. The outer layer of blastocyst is known as

(a) Zona pellucida (b) Trophoblast (c) Blastomere (d) Corona radiata

42 ➤ 142. Which layer of blastocyst gets attached to the endometrium during implantation?

(a) Trophoblast (b) Blastomere (c) Inner cell mass (d) Morula

43 ➤ 143. The inner cell mass of blastocyst develops into

(a) Morula b) Trophoblast (c) Embryo (d) Zygote

44 ➤ 144. After implantation the finger-like projection which appears on the trophoblast are known as

(a) Intestinal villi (b) Ampullary villi (c) Chorionic villi (d) Amniotic villi

45 ➤ 145. After implantation the finger-like projections on the trophoblast are surrounded by

(a) Uterine tissue (b) Maternal blood (c) Both (a) and (b) (d) Either (a) and (b)

46 ➤ 146. The structural and functional unit between the foetus and maternal blood is known as

(a) Inner cell (b) Placenta (c) Trophoblast (d) Chorionic villi

47 ➤ 147. Placenta does not perform which of the following function?

(a) Supply of O2 (b) Supply of excretory materials (c) Supply of nutrients (d) Removal of CO2

48 ➤ 148. The placenta is connected to embryo through ____ cord.

(a) Chorionic (b) Umbilical (c) Amniocentic (d) Uterine

49 ➤ 149. Placenta also acts as a/an ____ tissue.

(a) Endocrine (b) Exocrine (c) Paracrine (d) Mepacrine

50 ➤ 150. Which of the following hormone is released by placenta?

(a) FSH (b) HCG (c) Relaxin (d) LH

51 ➤ 151. Relaxin is secreted by

(a) Ovary (b) Uterus (c) Cervix (d) Oviduct

52 ➤ 152. How many germinal layers does embryo consist of initially, after implantation?

(a) 3 (b) 2 (c) 4 (d) 5

53 ➤ 153. In human embryonic development, which layer develops between the ectoderm and endoderm?

(a) Mesothelium (b) Mesoderm (c) Myoderm (d) Myometrium

54 ➤ 154. In humans, the inner cell mass (embryo) contains certain cells called ____ cells which have the potential to give rise to all the tissues and organs.

(a) Root (b) Leaf (c) Stem (d) Seed

55 ➤ 155. The average time span of human gestation is

(a) 8 months (b) 9 months (c) 10 months (d) 1 year

56 ➤ 156. The pregnancy phase in humans is divided into how many trimesters?

(a) 2 (b) 4 (c) 3 d) 5

57 ➤ 157. After one month of pregnancy which vital organ is formed in the foetus?

(a) Brain (b) Heart (c) Lungs (d) Liver

58 ➤ 158. In a developing foetus, most of the major organ systems are developed by the end of ____weeks.

(a) 14 (b) 12 (c) 10 (d) 16

59 ➤ 159. Foetal limbs and digits are formed in the ____ month of embryonic development.

(a) 4th (b) 2nd (c) 3rd (d) 7th

60 ➤ 160. The second trimester of human pregnancy is characterized by

(a) Appearance of heart and aorta (b) Appearance of external genital organs (c) Appearance of fine hair, eye-lashes on the eye-lids (d) Appearance of limbs and digits

61 ➤ 161. The scientific name of childbirth is

(a) Gestation (b) Parturition (c) Implantation (d) Foetal development

62 ➤ 162. During parturition, the mild uterine contractions which lead to expulsion of the foetus is known as

(a) Foetal ejection release (b) Foetal ejection reflex (c) Foetal uterine reflex (d) Foetal placental reflex

63 ➤ 163. Which hormone is responsible for severe uterine contractions during parturition?

(a) Oestrogen (b) Oxytocin (c) Progesterone (d) Relaxin

64 ➤ 164. What does ‘f’ represent in the figure?

(a) Sertoli cells (b) Spermatogonium (c) Spermatid (d) Primary spermatocyte

65 ➤ 165. What is indicated by ‘e’ in the figure?

(a) Sertoli cells (b) Spermatogonium (c) Spermatid (d) Primary spermatocyte

66 ➤ 166. What does ‘d’ represent in the figure?

(a) Sertoli cells (b) Spermatogonium (c) Spermatid (d) Primary spermatocyte

67 ➤ 167. What is indicated by ‘a’ in the figure?

(a) Spermatid (b) Spermatozoa (c) Secondary spermatocyte (d) Primary spermatocyte

68 ➤ 168. After the delivery of the foetus which of the following structure is also expelled out?

(a) Uterus (b) Corpus luteum (c) Placenta (d) Ovary

69 ➤ 169. The production of milk in mammary gland occurs

(a) During parturition (b) After parturition (c) Before embryogenesis (d) At the end of pregnancy

70 ➤ 170. The milk produced during the initial days of lactation is called

(a) Menstrum (b) Colostrum (c) Gynostrum (d) None of these

71 ➤ 171. The first foetal movement is observed during the ____ month of embryonic development.

(a) 4th (b) 5th (c) 3rd (d) 7th

72 ➤ 172. Embryos with more than 8 blastomeres could be transferred into the ____.

(a) Uterus (b) Fallopian tube (c) Placenta (d) Cervix

73 ➤ 173. Transfer of an ovum from a donor to another female who can provide a suitable environment for fertilization is called

(a) ZIFT (b) GIFT (c) ICSI (d) IUT

74 ➤ 174. Intracytoplasmic sperm injection is a specialized procedure in which the sperm is directly injected into the ____.

(a) Ovary (b) Fallopian tube (c) Ovum (d) Uterus

75 ➤ 175. In artificial insemination, the semen from husband/healthy donor is artificially introduced into the ____.

(a) Vagina (b) Oviduct (c) Uterus (d) Both (a) and (c)

76 ➤ 176. What is indicated by ‘h’ in the figure?

(a) Nipple (b) Areola (c) Laticiferous duct (d) Breast

77 ➤ 177. What does ‘e’ represent in the figure?

(a) Laticiferous duct (b) Ampulla (c) Mammary duct (d) Areola

78 ➤ 178. What does ‘a’ represent in the figure ?

(a) Mammary alveolus (b) Fat (c) Proteins (d) Laticiferous duct

79 ➤ 179. What is indicated by ‘j’ in the figure?

(a) Cartilage between ribs (b) Ribs (c) Sterum (d) Muscles between ribs

80 ➤ 180. What does ‘k’ represent in the figure?

(a) Pectoral girdle (b) Rib cage (c) Pectoralis major muscle (d) Pectoralis minor muscle

81 ➤ 181. In an adult, each testis is in shape, with a length of about and a width of about_.

(a) round, 4 to 5 cm, 2 to 3 cm (b) oval, 2 to 3 cm, 4 to 5 cm (c) oval, 4 to 5 cm, 2 to 3 cm (d) round, 2 to 3 cm, 4 to 5 cm

82 ➤ 182. Each testis has how many testicular tubules?

(a) 200 (b) 250 (c) 300 (d) 150

83 ➤ 183. Male sex accessory ducts include (i) Rete testis (ii) Vasa efferentia (iii) Epididymis (iv) Vas deferens

(a) i, ii (b) ii, iii (c) i, ii, iii (d) i, ii, iii, iv

84 ➤ 184. Which of the following duct stores sperm?

(a) Vasa efferentia (b) Rete testis (c) Epididymis (d) All of these

85 ➤ 185. The female reproductive system along with a pair of mammary glands is integrated structurally and functionally to support the process of

(a) Ovulation and fertilization (b) Pregnancy and birth (c) Child care (d) All the above

86 ➤ 186. Find out the incorrect statement about ovaries.

(a) Each ovary is connected to the pelvic wall and uterus by ligaments. (b) The ovarian stroma is divided into two zones, i.e., a peripheral cortex and an inner medulla. (c) Each ovary is covered by thick epithelium which encloses the ovarian stroma. (d) Ovaries are the primary female sex organs.

87 ➤ 187. The fallopian tube is about _____ long.

(a) 10 to 12 cm (b) 8 to 10 cm (c) 12 to 14 cm (d) 14 to 16 cm

88 ➤ 188. The part of the fallopian tube closer to the ovary is

(a) Infundibulum (b) Ampulla (c) Isthmus (d) Womb

89 ➤ 189. Which facts about the uterus (in human females) is true?

(a) Single (b) Also called womb (c) Inverted pear shape (d) All of these

90 ➤ 190. Birth canal is formed by (i) Uterus (ii) Cervix (iii) Vagina

(a) i and ii (b) i and iii (c) ii and iii (d) iii only

91 ➤ 191. Which statement is true about the walls of the uterus?

(a) It has a thick membranous external wall called the perimetrium. (b) It has a thin middle layer of smooth muscles called the myometrium. (c) It has an inner glandular layer called the endometrium. (d) All are true

92 ➤ 192. The endometrium undergoes cyclical changes during the ____ cycle.

(a) Menstrual (b) Oestrous (c) Thermal (d) None of these

93 ➤ 193. The opening of vagina is often covered partially by

(a) Mons pubis (b) Labia majora (c) Labia minora (d) Hymen

94 ➤ 194. Which of the facts is true about clitoris? (i) It is a tiny finger-like structure. (ii) It lies at the upper junction of two labia minora. (iii) It lies at the upper junction of two labia majora. (iv) It lies above the utheral opening. (v) It lies below the urethral opening.

(a) i, ii and iii (b) i, ii and v (c) i, ii and iv (d) iii and v

95 ➤ 195. Hymen can be torn or broken by (i) First coitus (ii) Sudden fall or jolt (iii) Horse riding (iv) Cycling (v) Insertion of a vaginal tampon

(a) i, ii and iv only (b) iii, iv and v only (c) i, iv and v only (d) All of these

96 ➤ 196. Select the true statement.

(a) Presence of hymen is a reliable indicator of virginity. (b) Absence of hymen is a reliable indicator of sexual experience. (c) Presence of hymen is a reliable indicator of sexual experience. (d) Presence or absence of hymen is not a reliable indicator of virginity.

97 ➤ 197. Which is the correct path for the secretion and transport of milk in mammary gland?

(a) Alveoli → Cavity of alveoli → Mammary tubule → Mammary duct → Mammary ampulla → Lactiferous duct (b) Mammary duct → Mammary tubule → Alveoli → Lactiferous duct → Mammary ampulla → Cavity of alveoli (c) Mammary duct → Cavity of alveoli → Lactiferous duct → Mammary ampulla → Mammary tubule → Alveoli (d) Alveoli → Mammary tubule → Mammary ampulla → Cavity of alveoli → Mammary duct → Lactiferous duct

98 ➤ 198. Which fact about the mammary glands in humans is false?

(a) A non-functional mammary gland is the characteristic of all male mammals. (b) Mammary glands are paired structures. (c) It is a glandular tissue containing fixed amount of fat. (d) Glandular tissue of each breast is divided into 15 to 20 mammary lobes containing clusters of cells called alveoli.