Practice Questions

TLS Online TPP Program

#Question id: 10365

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

#Life Sciences

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

More Questions

#Question id: 90

#Zoology

Pyranose rings are usually most stable when the ring adopts a ________ conformation with the bulkiest ring substituents in ________ positions.

#Question id: 92

#Zoology

Monosaccharide derivatives in which an amino group replaces one of the hydroxyl groups may have important roles in

#Question id: 93

#Zoology

What type of bond links the monomers of a polysaccharide?

#Question id: 94

#Zoology

A monosaccharide whose anomeric carbon atom has a glycosidic bond to an alcohol, amine or thiol is a ________.

#Question id: 95

#Zoology

What is the name of the disaccharide shown below that is formed by joining two monomers of D-glucose

#Question id: 96

#Zoology

A reducing sugar is one that