Drug called 'Heroin' is synthesized by:

NEET-2019 Human-Health-and-Disease [class-xii ]

• methylation of morphine
• glycosylation of morphine
• acetylation of morphine
• nitration of morphine
Correct Option: C  [ acetylation of morphine ]

Remark:

What triggers activation of protoxin to active Bt toxin of Bacillus thuringiensis in boll worm?

NEET-2019 Strategies-for-Enhancement-in-Food-Production [class-xii ]

• Body temperature
• Moist surface of midgut
• Acidic pH of stomach
• Alkaline pH of gut
Correct Option: D  [ Alkaline pH of gut ]

Remark:

Select the incorrect statement:

NEET-2019 Strategies-for-Enhancement-in-Food-Production [class-xii ]

• Inbreeding selects harmful recessive genes that reduce fertility and productivity
• Inbreeding increases homozygosity
• Inbreeding is essential to evolve purelines in any animal
• Inbreeding helps in accumulation of superior genes elimination of undesirable genes
Correct Option: A  [ Inbreeding selects harmful recessive genes that reduce fertility and productivity ]

Remark:

Match the following organisms with the products they produce:

NEET-2019 Microbes-in-Human-Welfare [class-xii ]

• (A)-(II), (B)-(IV), (C)-(V), (D)-(III)
• (A)-(III), (B)-(IV), (C)-(V), (D)-(I)
• (A)-(II), (B)-(IV), (C)-(III), (D)-(V)
• (A)-(II), (B)-(I), (C)-(III), (D)-(V)
Correct Option: C  [ (A)-(II), (B)-(IV), (C)-(III), (D)-(V) ]

Remark:

The Earth Summit held in Rio de Janeiro in 1992 was called:

NEET-2019 Biodiversity-and-Conservation [class-xii ]

• for conservation of biodiversity and sustainable utilization of its benefits.
• to reduce CO2 emissions and global warming.
• to assess threat posed to native species by invasive weed species.
• for immediate steps to discontinue use of CFCs that were damaging the ozone layer.
Correct Option: A  [ for conservation of biodiversity and sustainable utilization of its benefits. ]

Remark:

Due to increasing air-borne allergens and pollutants, many people in urban areas are suffering from respiratory disorder causing wheezing due to:

NEET-2019 Environmental-Issues [class-xii ]

• benign growth on mucous lining of nasal cavity.
• proliferation of fibrous tissues and damage of the
• inflammation of bronchi and bronchioles.
• reduction in the secretion of surfactants by pneumocytes.
Correct Option: C  [ inflammation of bronchi and bronchioles. ]

Remark:

Which of the following protocols did aim for reducing emission of chloroflurocarbons into the atmosphere?

NEET-2019 Environmental-Issues [class-xii ]

• Geneva Protocol
• Gothenburg Protocol
• Kyoto protocol
• Montreal protocol
Correct Option: D  [ Montreal protocol ]

Remark:

Which one of the following equipments is essentially required for growing microbes on a large scale, for industrial production of enzymes?

NEET-2019 Environmental-Issues [class-xii ]

• BOD incubator
• Bioreactor
• Sludge digester
• Industrial oven
Correct Option: B  [ Bioreactor ]

Remark:

Which of these following methods is the most suitable for disposal of nuclear waste?

NEET-2019 Environmental-Issues [class-xii ]

• Burry the waste within rocks deep below the Earth's surface
• Dump the waste within rocks under deep ocean
• Bury the waste under Antarctic ice-cover
• Shoot the waste into space
Correct Option: A  [ Burry the waste within rocks deep below the Earth's surface ]

Remark:

Which of the following pairs of gases is mainly responsible for green house effect?

NEET-2019 Environmental-Issues [class-xii ]

• Carbon dioxide and Methane
• Nitrogen and Sulphur dioxide
• Oxygen and Nitrogen
• Ozone and Ammonia
Correct Option: A  [ Carbon dioxide and Methane ]

Remark: