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TLS Online TPP Program

#Question id: 10365

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

#Environmental Science
  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
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TLS Online TPP Program

#Question id: 39532

#Biochemistry

 The universal solvent in biological systems is:
TLS Online TPP Program

#Question id: 39533

#Biochemistry

Adsorption differs from absorption because adsorption:
TLS Online TPP Program

#Question id: 39534

#Biochemistry

Increase in viscosity of blood is mainly due to:
TLS Online TPP Program

#Question id: 39535

#Biochemistry

Osmotic pressure of a solution depends on:
TLS Online TPP Program

#Question id: 39536

#Biochemistry

According to Lambert–Beer’s law, absorbance is proportional to:
TLS Online TPP Program

#Question id: 39537

#Biochemistry

 Which of the following statements are correct?

I. Biochemistry bridges biology and chemistry
II. Elements like C, H, O, N are major constituents of biomolecules
III. Trace elements have no biological importance