Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 62453
TLS Online TPP Program

#Question id: 10365

Why the nitrogenase enzymes catalyzes the nitrogen fixation reaction only in microanaerobic or anaerobic conditions?

#Applied Microbiology
  1. O2 form ROS (reactive oxygen species) that inhibits the enzyme nitrogenase
  2. Oxygen, being a strong electron acceptor, can damage these sites and irreversibly inactivate nitrogenase, so nitrogen must be fixed under anaerobic conditions
  3. Because lack a PSI, the oxygen-producing photosystem of chloroplasts, so they do not generate oxygen
  4. nitrogenase enzymes only active in anaerobic environment and inhibit in the aerobic environment due to O2
More Questions
TLS Online TPP Program

#Question id: 40536

#Environmental Science

Consider statements about leachate formation:
1. Moisture infiltration contributes to leachate generation.
2. Decomposition products dissolve into percolating water.
3. Proper liners eliminate leachate formation entirely.
Correct statements:
TLS Online TPP Program

#Question id: 40537

#Environmental Science

On hazardous waste management:
1.Secure landfills isolate toxic materials.
2.Mixing hazardous waste with municipal waste reduces toxicity.
3.Treatment aims to stabilize harmful constituents.
Choose Correct option:
TLS Online TPP Program

#Question id: 40538

#Environmental Science

Match List I (Pollutant) with List II (Primary Impact):

List IList II
A. SO21. Neurotoxicity
B. Mercury2. Acid rain
C. Nitrates3. Methemoglobinemia
D. CFCs4. Ozone depletion
TLS Online TPP Program

#Question id: 40539

#Environmental Science

Match List I with List II regarding air pollutants and their effects

List I (Pollutant)List II (Effect)
A. Peroxyacetyl nitrate (PAN)1. Reduces oxygen-carrying capacity of blood
B. Sulphur dioxide2. Causes photochemical smog
C. Nitrogen dioxide3. Bronchial irritation and acid rain
D. Carbon monoxide4. Pulmonary edema and reduced lung function
TLS Online TPP Program

#Question id: 40540

#Environmental Science

Match the heavy metal with the associated disease

List I (Metal)List II (Disease/Effect)
A. Mercury1. Minamata disease
B. Cadmium2. Itai-itai disease
C. Lead3. Black foot disease
D. Arsenic4. Anemia and neurological damage
TLS Online TPP Program

#Question id: 40541

#Environmental Science

ASSERTION–REASON 

Assertion (A):Biomagnification is more pronounced in aquatic ecosystems.

Reason (R):Persistent organic pollutants are fat-soluble and resistant to biodegradation.