NCERT - Human Reproduction Questions and Answers of Class 12 Biology | GkSeries

Questions
151 Meroblastic cleavage is a division which is
1 Spiral
2 Total
3 horizontal
4 Partial/ parietal

Answer: Partial/ parietal
152 After ovulation Graffian follicle regresses into
1 Corpus luteum
2 Corpus albicans
3 Corpus callosum
4 Corpus artesia

Answer: Corpus luteum
153 Sertoli cells are regulated by the pituitary hormone known as
1 LH
2 GH
3 FSH
4 Prolactin

Answer: FSH
154 The middle piece of the sperm contains
1 Proteins
2 Nucleus
3 Mitochondria
4 Centriole

Answer: Mitochondria
155 Budding method of asexual reproduction occurs in
1 Amoeba
2 Plasmodium
3 Paramecium
4 Hydra

Answer: Hydra
156 In a normal pregnant woman, the amount of total gonadotropin activity was assessed. The result expected was
1 High levels of FSH and LH in uterus to stimulate endometrial thickening
2 High level of circulating HCG to stimulate estrogen and progesterone synthesis
3 High level of circulating FSH and LH in the uterus to stimulate implantation of the embryo
4 High level of circulating HCG to stimulate endometrial thickening

Answer: High level of circulating HCG to stimulate estrogen and progesterone synthesis
157 Which one of the following is the most likely root cause why menstruation is not taking place in regularly cycling human female?
1 Retention of well-developed corpus luteum
2 Fertilisation of the ovum
3 Maintenance of the hypertrophical endometrial lining
4 Maintenance of high concentration of sex-hormones in the blood stream

Answer: Maintenance of high concentration of sex-hormones in the blood stream
158 Which of the following groups of cells in the male gonad, represent haploid cells?
1 Primary spermatocytes
2 Spermatogonial cells
3 Germinal epithelial cells
4 Secondary spermatocytes

Answer: Secondary spermatocytes
159 Which one of the following statements about human sperm is correct?
1 Acrosome serves no particular function
2 Acrosome has a conical pointed structure used for piercing and penetrating the egg resulting in fertilization
3 The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilization
4 Acrosome serves as a sensory structure leading the sperm towards the ovum

Answer: The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilization
160 The process of sperm production takes place in the ______.
1 Epididymis
2 Vas deferens
3 Prostate glands
4 Seminiferous tubules

Answer: Seminiferous tubules
161 Cryptorchidism is a condition of tests
1 Unale to produce sperms
2 Having been surgically removed
3 Unable to descend in scrotal sacs
4 Having remained undeveloped

Answer: Unable to descend in scrotal sacs
162 Corona radia is made up of
1 zona pellucid around the oocyte
2 vitelline membrane
3 follicular cells around the oocyte
4 stratum functionalis

Answer: follicular cells around the oocyte
163 Signals for parturition originate from
1 Placenta only
2 Fully developed foetus only
3 Both placenta as well as fully developed foetus
4 Oxytocin released from maternal pituitary

Answer: Both placenta as well as fully developed foetus
164 Which of the following structures are derivatives of the endoderm?
1 Skin and nerve cord
2 Alimentary canal and respiratory structures
3 Muscles and blood
4 Excretory and reproductive structures

Answer: Alimentary canal and respiratory structures
165 Acrosome is derived from
1 Nucleus
2 Golgi apparatus
3 Mitochondria
4 Cytoplasm

Answer: Golgi apparatus

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