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The amino acid coded by the start codon for protein synthesis is
उत्तर देखें
सही उत्तर: (A) Methionine
1 अंक · 2023 · सेट A
प्रश्न 52
In humans, the numbers of ova and sperms that would be produced from 100 secondary oocytes and 100 secondary spermatocytes during gametogenesis are
उत्तर देखें
सही उत्तर: (C) 100 ova and 200 sperms
1 अंक · 2023 · सेट A
प्रश्न 53
Crossing-over occurs between
उत्तर देखें
सही उत्तर: (A) Non-sister chromatids of homologous chromosomes at pachytene stage of prophase I
1 अंक · 2023 · सेट A
प्रश्न 54
The Bartholin glands of the female reproductive system are located on the
उत्तर देखें
सही उत्तर: (C) Either side of the vagina
1 अंक · 2023 · सेट A
प्रश्न 55
If both genotype and phenotype show the same ratio of 1 : 2 : 1 in the F₂ generation, it shows
उत्तर देखें
सही उत्तर: (A) Incomplete dominance in a monohybrid cross
1 अंक · 2023 · सेट A
प्रश्न 56
Which of the following enzymes separates the two strands of DNA during replication?
उत्तर देखें
सही उत्तर: (B) Helicase
1 अंक · 2023 · सेट A
प्रश्न 57
Cytoplasmic inheritance is also called maternal inheritance because
उत्तर देखें
सही उत्तर: (C) Most of the cytoplasm of the zygote is provided by the ovum
1 अंक · 2023 · सेट A
प्रश्न 58
Male XX and female XY are sometimes seen as a result of
उत्तर देखें
सही उत्तर: (B) Segment transfer in the X and Y chromosomes
1 अंक · 2023 · सेट A
प्रश्न 59
Which of the following two traits is characteristic of a single gene?
उत्तर देखें
सही उत्तर: (C) Colour of flower and seed coat
1 अंक · 2023 · सेट A
प्रश्न 60
Which of the following enzymes is used to cut DNA molecules in rDNA technology?
उत्तर देखें
सही उत्तर: (C) Restriction enzymes
1 अंक · 2023 · सेट A
प्रश्न 61
_____ in 1983 used recombinant DNA technology to produce insulin.
उत्तर देखें
सही उत्तर: (A) Eli Lilly
1 अंक · 2023 · सेट A
प्रश्न 62
Which of the following is the first genetically engineered hormone?
उत्तर देखें
सही उत्तर: (B) Insulin
1 अंक · 2023 · सेट A
प्रश्न 63
Which of the following statements is false?
उत्तर देखें
सही उत्तर: (D) More than one of the above
1 अंक · 2023 · सेट A
प्रश्न 64
The DNA fingerprinting pattern of a child is
उत्तर देखें
सही उत्तर: (C) 50% bands similar to the father and the rest similar to the mother
1 अंक · 2023 · सेट A
प्रश्न 65
Which of the following statements is true?
उत्तर देखें
सही उत्तर: (A) All immunogens are antigens but all antigens are not immunogens.
1 अंक · 2023 · सेट A
प्रश्न 66
If more than a single species of fish is cultured at a time, then it is called
उत्तर देखें
सही उत्तर: (C) Polyculture
1 अंक · 2023 · सेट A
प्रश्न 67
Which of the following is a step taken by the Government to protect wildlife?
उत्तर देखें
सही उत्तर: (C) Various projects to protect animals in the forest
1 अंक · 2023 · सेट A
प्रश्न 68
On what does the harmful effect of pollution depend?
उत्तर देखें
सही उत्तर: (B) The concentration, duration of exposure to pollutants, and the organism
1 अंक · 2023 · सेट A
प्रश्न 69
Absence of acrosome will affect which activity in a normal sperm?
उत्तर देखें
सही उत्तर: (C) Penetration into the ovum
1 अंक · 2023 · सेट A
प्रश्न 70
How can viable material of endangered species be preserved?
उत्तर देखें
सही उत्तर: (B) By gene bank
1 अंक · 2023 · सेट A
प्रश्न 71
Who among the following is known as the father of biological classification?
उत्तर देखें
सही उत्तर: (A) Carolus Linnaeus
1 अंक · 2023 · सेट A
प्रश्न 72
The animals from which of the following phyla are exclusively marine?
उत्तर देखें
सही उत्तर: (C) Echinodermata
1 अंक · 2023 · सेट A
प्रश्न 73
Which of the following is not an RNA virus?
उत्तर देखें
सही उत्तर: (E) None of the above
1 अंक · 2023 · सेट A
प्रश्न 74
In which State is the Vikramshila Gangetic Dolphin Sanctuary located?
उत्तर देखें
सही उत्तर: (B) Bihar
1 अंक · 2023 · सेट A
प्रश्न 75
Which of the following is an example of dense irregularly arranged connective tissue?
उत्तर देखें
सही उत्तर: (B) Dermis
1 अंक · 2023 · सेट A
प्रश्न 76
Which artery supplies oxygenated blood to the rabbit brain?
उत्तर देखें
सही उत्तर: (C) Internal carotid
1 अंक · 2023 · सेट A
प्रश्न 77
In transmission electron microscopy, ultrathin sections are stained by
उत्तर देखें
सही उत्तर: (A) Uranyl acetate and lead citrate
1 अंक · 2023 · सेट A
प्रश्न 78
In the unit membrane model, what is the thickness of each dense band?
उत्तर देखें
सही उत्तर: (A) 20 Å
1 अंक · 2023 · सेट A
प्रश्न 79
Facilitated diffusion differs from simple diffusion by
उत्तर देखें
सही उत्तर: (D) More than one of the above
1 अंक · 2023 · सेट A
प्रश्न 80
The numbers of cisternae in a stack of Golgi complex found in most animals and plants are
उत्तर देखें
सही उत्तर: (C) 3–8
1 अंक · 2023 · सेट A
प्रश्न 81
A modified form of smooth endoplasmic reticulum found in striated muscles is known as
उत्तर देखें
सही उत्तर: (B) Sarcoplasmic reticulum
1 अंक · 2023 · सेट A
प्रश्न 82
Which of the following enzymes is found on the outer membrane of mitochondrial cristae?
उत्तर देखें
सही उत्तर: (E) None of the above
1 अंक · 2023 · सेट A
प्रश्न 83
The leucoplasts which function in the storage of starch are called
उत्तर देखें
सही उत्तर: (A) Amyloplasts
1 अंक · 2023 · सेट A
प्रश्न 84
Which of the following is not a type of secondary lysosome?
उत्तर देखें
सही उत्तर: (D) More than one of the above
1 अंक · 2023 · सेट A
प्रश्न 85
Which activity takes place during the post-mitotic gap phase (G₁)?
उत्तर देखें
सही उत्तर: (A) RNA and protein synthesis
1 अंक · 2023 · सेट A
प्रश्न 86
Synapsis takes place during
उत्तर देखें
सही उत्तर: (B) Zygotene
1 अंक · 2023 · सेट A
प्रश्न 87
Which of the following is an example of a simple protein?
उत्तर देखें
सही उत्तर: (E) None of the above
1 अंक · 2023 · सेट A
प्रश्न 88
Which of the following liver cells phagocytizes dead and inactive RBCs?
उत्तर देखें
सही उत्तर: (B) Kupffer’s cells
1 अंक · 2023 · सेट A
प्रश्न 89
Which marriage should be prohibited from a biological point of view?
उत्तर देखें
सही उत्तर: (B) Rh+ boy and Rh− girl
1 अंक · 2023 · सेट A
प्रश्न 90
Each actin (thin) filament is made up of
उत्तर देखें
सही उत्तर: (D) More than one of the above
1 अंक · 2023 · सेट A
प्रश्न 91
Cushing’s syndrome occurs due to
उत्तर देखें
सही उत्तर: (C) Maximum secretion of cortisol
1 अंक · 2023 · सेट A
प्रश्न 92
Which of the following methods is used for measuring population density for more mobile organisms?
उत्तर देखें
सही उत्तर: (A) Capture-recapture method
1 अंक · 2023 · सेट A
प्रश्न 93
Desert ecosystem is characterised by:
उत्तर देखें
सही उत्तर: (C) Extremely high or low temperatures, low rainfall, and scarce or no vegetation
1 अंक · 2023 · सेट A
प्रश्न 94
Which of the following hormones from the adenohypophysis controls the function of the seminiferous tubules?
उत्तर देखें
सही उत्तर: (A) Luteinizing hormone (LH)
1 अंक · 2023 · सेट A
प्रश्न 95
Which enzyme is produced by the epididymis?
उत्तर देखें
सही उत्तर: (D) More than one of the above
1 अंक · 2023 · सेट A
प्रश्न 96
In which region of the fallopian tube does fertilization take place?
उत्तर देखें
सही उत्तर: (B) Ampulla
1 अंक · 2023 · सेट A
प्रश्न 97
The ovary is suspended from the body wall by
उत्तर देखें
सही उत्तर: (A) Mesovarium
1 अंक · 2023 · सेट A
प्रश्न 98
The pubertal changes in secondary sex characteristics result from increasing levels of which of the following hormones?
उत्तर देखें
सही उत्तर: (A) Gonadal steroids
1 अंक · 2023 · सेट A
प्रश्न 99
During spermatogenesis, type B spermatogonia divide by
उत्तर देखें
सही उत्तर: (B) Mitosis
1 अंक · 2023 · सेट A
प्रश्न 100
The fusion of sperm and oocyte membranes causes what to occur?
उत्तर देखें
सही उत्तर: (B) Cortical reaction
1 अंक · 2023 · सेट A
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