NTA Zoology Human Reproduction <

Question No:1

After ovulation, Graafian follicle transforms into:

(A) Corpus cavernosa
(B) Corpus pellucida
(C) Corpus luteum
(D) Corpus metrium



Question No:2

Large amounts of progesterone is secreted by

(A) Corpus metvium
(B) Corpus luteum
(C) Corpus cavernosa
(D) Corpus pellucida



Question No:3

If fertilization does not occur corpus luteum __.

(A) proliferates
(B) degenerates
(C) regenerates
(D) divides



Question No:4

The menstrual cycle ceases at the age of 50 in human females and is known as

(A) Ovopause
(B) Menarche
(C) Menopause
(D) Menstruation



Question No:5

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) Uteri-carvical junction



Question No:6

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 the above



Question No:7

The sperm comes into contact with the __ layer of ovum to cause fertilization,

(A) Corona radiate
(B) Perivitelline layer
(C) Zona pellucida
(D) Zona fasciculate



Question No:8

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



Question No:9

After entry of sperm into cytoplasm of ovum 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



Question No:10

Human female has following sex chromosome pattern

(A) XX
(B) YY
(C) XY
(D) XYX



Question No:11

Human male has following sex chromosome pattern

(A) XYX
(B) XY
(C) XX
(D) YY



Question No:12

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 above



Question No:13

Scientifically sex of the baby is determined by

(A) Only mother
(B) Only father
(C) Either mother or father
(D) Gestational phase



Question No:14

After formation of zygote, it cleaves into 2, 4, 8, 16 daughter cells called:

(A) Blastocyst
(B) Morula
(C) Trophoblast
(D) Blastomere



Question No:15

The embryo with 2-‘ or 42 blastomeres is known as

(A) Blastocyst
(B) Morula
(C) Trophoblast
(D) Zygote



Question No:16

Morula divides and transforms into

(A) Inner cell mass
(B) Blastocyst
(C) Trophoblast
(D) Blastomere



Question No:17

The outer layer of blastocyst is known as

(A) Zona pellucida
(B) Trophoblast
(C) Blastomere
(D) Corona radiate



Question No:18

Which layer of blastocyst gets attached to the endometrium during implantation?

(A) Trophoblast
(B) Blastomere
(C) Inner cell mass
(D) Morula



Question No:19

The inner cell mass of blastocyst develops into

(A) Morula
(B) Trophoblast
(C) Embryo
(D) Zygote



Question No:20

After implantation finger-like projection which appears on the trophoblast are known as

(A) Intestinal villi
(B) b) Ampullary villi
(C) Chorionic villi
(D) Amniocentic villi



Question No:21

After implantation 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)



Question No:22

The structural and functional unit between the foetus and maternal blood is known as

(A) Inner cell
(B) Placenta
(C) Trophoblast
(D) Chorionic villi



Question No:23

Placenta does not perform following function

(A) Supply of O₂
(B) Supply of excretory materials
(C) Supply of nutrients
(D) Removal of CO₂



Question No:24

The placenta is connected to embryo through __ cord.

(A) Chorionic
(B) Umbilical
(C) Amniocentic
(D) Uterine



Question No:25

Placenta also acts as a/an ___ tissue.

(A) Endocrine
(B) Exocrine
(C) Paracrine
(D) Mepacrine