What triggers activation of protoxin to active Bt toxin of Bacillus thuringiensis in boll worm?
Moist surface of midgut
Alkaline pH of gut
Acidic pH of stomach
Body temperature
B.
Alkaline pH of gut
Bacillus thuringiensis forms protein crystals during a particular phase of their growth. These crystals contain a toxic insecticidal protein. These protein exist as inactive protoxins but once an insect ingest the inactive toxin, it is converted into an active form of toxin due to alkaline pH of the gut which solubilize the crystals. The activated toxin binds to the surface of midgut epithelial cells and create pores that cause cell swelling and lysis and eventually cause death of insect.
Which one of the following equipments is essentially required for growing microbes on a large scale, for industrial production of enzymes?
Sludge digester
Industrial oven
Bioreactor
BOD incubator
Which of the following protocols did aim for reducing emission of chlorofluorocarbons into the atmosphere?
Kyoto Protocol
Gothenburg Protocol
Geneva Protocol
Montreal Protocol
Placentation in which ovules develop on the inner wall of the ovary or in peripheral part, is
Axile
Parietal
Free central
Basal
Select the correct sequence for transport of sperm cells in male reproductive system.
Seminiferous tubules → Rete testis → Vasa efferentia → Epididymis → Vas deferens → Ejaculatory duct → urethra → urethral meatus
Seminiferous tubules → Vasa efferentia → epididymis → Inguinal canal → Urethra
Testis → Epididymis → vasa efferentia → vas deferens → ejaculatory duct → inguinal canal → urethra → Urethral meatus
Testis → Epididymis → Vasa efferentia → Rete testis → Inguinal canal → Urethra
Which of the following is the most important cause for animals and plants being driven to extinction?
Drought and floods
Economic exploitation
Alien species invasion
Habitat loss and fragmentation
Which of the following is true for Golden rice?
It is pest resistant, with a gene from Bacillus thuringiensis
It is drought tolerant, developed using Agrobacterium vector
It has yellow grains, because of a gene introduced from a primitive variety of rice
It is Vitamin A enriched, with a gene from daffodil
What is the genetic disorder in which an individual has an overall masculine development gynaecomastia, and is sterile ?
Klinefelter's syndrome
Edward syndrome
Down's syndrome
Turner's syndrome
Purines found both in DNA and RNA are
Adenine and guanine
Guanine and cytosine
Cytosine and thymine
Adenine and thymine
