Which of the following features of genetic code does allow bacteria to produce human insulin by recombinant DNA technology?
A) Genetic code is specific B) Genetic code is not ambiguous C) Genetic code is redundant D) Genetic code is... View Article
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What is the genetic disorder in which an individual has an overall masculine development gynaecomastia, and is sterile?
A) Down’s syndrome B) Turner’s syndrome C) Klinefelter’s syndrome D) Edward syndrome Answer: C) Klinefelter’s syndrome Explanation: Klinefelter’s syndrome is characterized... View Article
From evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time is first observed in
A) Gymnosperms B) Liverworts C) Mosses D) Pteridophytes Answer: D) Pteridophytes Explanation: The female gametophyte with the developing young embryo is... View Article
Due to increasing air-borne allergens and pollutants, many people in urban areas are suffering from respiratory disorder. It causes wheezing due to
A) reduction in the secretion of surfactants by pneumocytes B) benign growth on mucous lining of nasal cavity C) inflammation... View Article
Which of the following protocols did aim for reducing emission of chlorofluorocarbons into the atmosphere?
A) Geneva Protocol B) Montreal Protocol C) Kyoto Protocol D) Gothenburg Protocol Answer: B) Montreal Protocol Explanation: Montreal protocol was the... View Article
What is the fate of the male gametes discharged in the synergid?
A) One fuses with the egg and other fuses with central cell nuclei. B) One fuses with egg other(s) degenerate(s)... View Article
Which of the following is the most important cause for animals and plants being driven to extinction?
A) Alien species invasion B) Habitat loss and fragmentation C) Drought and floods D) Economic exploitation Answer: B) Habitat loss and... View Article
Which of the following pair of organelles does not contain DNA?
A) Nuclear envelope and Mitochondria B) Mitochondria and Lysosomes C) Chloroplast and Vacuoles D) Lysosomes and Vacuoles Answer: D) Lysosomes and... View Article
Which of the following ecological pyramids is generally inverted?
A) Pyramid of biomass in a sea B) Pyramid of numbers in grassland C) Pyramid of energy D) Pyramid of... View Article
Polyblend, a fine powder of recycled modified plastic, has proved to be a good material for
A) Making tubes and pipes B) Making plastic sacks C) Use as a fertilizer D) Construction of roads Answer:D) Construction... View Article
What is the direction of movement of sugars in phloem?
A) Bi-directional B) Non-multidirectional C) Upward D) Downward Answer: A) Bi-directional Explanation: Leaves prepare carbohydrates by photosynthesis. Sugar has to be... View Article
Select the correct option regarding ribs
A) There are seven pairs of vertebrosternal, three pairs of vertebrochondral and two pairs of vertebral ribs. B) 8th, 9th... View Article
The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by
A) Sutton Boveri B)H. Morgan C) Gregor J. Mendel D) Alfred Sturtevant Answer:D) Alfred Sturtevant Explanation: Alfred Sturtevant was a... View Article
Pinus seed cannot germinate and establish without fungal association. This is because
A) its seeds contain inhibitors that present germination. B) its embryo is immature. C) it has an obligate association with... View Article
Concanavalin A is
A) a pigment B) an alkaloid C) an essential oil D) a lectin Answer:D) a lectin Explanation: Concanavalin A is... View Article
What map unit (Centimorgan) is adopted in the construction of genetic maps?
A) A unit of distance between genes on chromosomes, representing 50% crossover. B) A unit of distance between two expressed... View Article
What is the site of perception of photoperiod necessary for induction of flowering in plants?
A) Leaves B) Lateral buds C) Pulvinus D) Shoot apex Answer: A) Leaves Explanation: Photoperiodism refers to the responses related to... View Article
Drug called Heroin is synthesized by
A) nitration of morphine B) methylation of morphine C) acetylation of morphine D) glycosylation of morphine Answer: C) acetylation of morphine... View Article
Which of the following sexually transmitted diseases is not completely curable?
A) Chlamydiasis B) Gonorrhoea C) Syphilis D) Genital herpes Answer: D) Genital herpes Explanation: Genital herpes is caused by a virus... View Article
Select the hormone-releasing Intrauterine Devices
A) Lippes Loop, Multiload 375 B) Vaults, LNG-20 C) Multiload 375, Progestasert D) Progestasert, LNG-20 Answer: D) Progestasert, LNG-20 Explanation: Hormone-releasing... View Article
