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Biology MCQ for Class XII By Sharad Sir
कृपया अधिक जानकारी के लिए यहाँ लॉगिन करें ----> --->
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Class XII
Q.1 The early stage human embryo distinctly possesses.
4 points
(a) gills
(b) gill slits
(c) external ear (pinna)
(d) eyebrows.
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Q.2 In the development of the human body, the ectoderm is responsible for the formation of.?
4 points
(a) lens of the eye
(b) nervous system
(c) sweat glands
(d) all of these.
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Q.3 During the development of embryo, which of the following occurs first?
4 points
(a) Differentiation of organ
(b) Differentiation of tissue
(c) Differentiation of organ system
(d) Differentiation of cells
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Q.4The Urine test during pregnancy determines the presence of.?
4 points
(a) human chorionic gonadotropin hormone
(b) estrogen
(c) progesterone
(d) luteinising hormone.
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Q.5 Which of the following hormones is not a secretory product of human placenta ?
4 points
(a) Human chorionic gonadotropin
(b) Prolactin
(c) Estrogen
(d) Progesterone
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Q.6 The solid mass of 8-16 cells formed from zygote after successive mitotic divisions is called.?
4 points
(a) blastula
(b) gastrula
(c) morula
(d) none of these.
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Q.7 What is true about cleavage in the fertilised egg in humans ?
4 points
(a) It starts while the egg is in Fallopian tube.
(b) It starts when the egg reaches uterus.
(c) It is meroblastic
(d) It is identical to the normal mitosis.
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Q.8 In oogenesis haploid egg is fertilised by sperm at which stage ?
4 points
(a) Primary oocyte
(b) Secondary oocyte
(c) Oogonium
(d) Ovum
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Q.9 1st polar body is formed at which stage of oogenesis ?
4 points
(a) 1st meiosis
(b) 2nd mitosis
(c) 1st mitosis
(d) Differentiation
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Q.10 At what stage of life is oogenesis initiated in a human female ?
4 points
(a) At puberty
(b) During menarch
(c) During menopause
(d) During embryonic development
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Q.11 Which of the following contains the actual genetic part of a sperm ?
4 points
(a) Whole of it
(b) Tail
(c) Middle piece
(d) Head
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Q.12 The third stage of parturition is called “after-birth”. In this stage
4 points
(a) excessive bleeding occurs
(b) fetus is bom and cervix and vagina contraction to normal condition happens
(c) fetus is bom and contraction of uterine wall prevents excessive bleeding
(d) placenta is expelled out.
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Q.13 The function of the secretion of prostate gland is to.?
4 points
(a) inhibit sperm activity
(b) attract sperms
(c) stimulate sperm activity
(d) none of these.
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Q.14 The nutritive cells found in seminiferous tubules are.?
4 points
(a) Leydig’s cells
(b) atretic follicular cells
(c) Sertoli cells
(d) chromaffin cells.
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Q. 15 Which of the following is correct about mammalian testes ?
4 points
(a) Graafian follicles, Sertoli cells, Leydig’s cells
(b) Graafian follicles, Sertoli cells, Seminiferous tubules
(c) Sertoli cells, Seminiferous tubules, Leyding’s cells
(d) Graafian follicle, leyding’s cells, Seminiferous tubule
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Q. 16 Which of the following hormones is not secreted by human placenta ?
4 points
(a) hCG
(b) Estrogens
(c) Progesterone
(d) LH
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Q.17 The vas deferens receives duct from the seminal vesicle and opens into urethra as.?
4 points
(a) epididymis
(b) ejaculatory duct
(c) efferent ductule
(d) ureter
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Q. 18 Which among the following has 23 chromosomes ?
4 points
(a) Spermatogonia
(b) Zygote
(c) Secondary oocyte
(d) Oogonia
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Q.19 Besides activating the egg another role of a sperm is to carry to egg.?
4 points
(a) RNA
(b) mitochondria
(c) DNA
(d) ribosome
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Q.20 Immediately after ovulation, the mammalian egg is covered by a membrane known as.?
4 points
(a) chorion
(b) zona pellucida
(c) corona radiata
(d) vitelline membrane.
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