81.

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

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

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

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

Persistent nucellus in the seed is known as

• Perisperm

• Hilum

• Tegmen

• Chalaza

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 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

Purines found both in DNA and RNA are

• Adenine and guanine

• Guanine and cytosine

• Cytosine and thymine

• Adenine and thymine

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