Practice Questions

TLS Online TPP Program

#Question id: 10365

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

#Unit 6. System Physiology – Plant

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

TLS Online TPP Program

#Question id: 8950

#Unit 9. Diversity of Life Forms

You have before you a living organism, which you examine carefully. Which of the following should convince you that the organism is acoelomate?

TLS Online TPP Program

#Question id: 23292

#General Aptitude

It is said that political power defeated the administrative power. You are also an eye witness of it. How could you accommodate yourself under these pressures?

TLS Online TPP Program

#Question id: 10982

#Unit 7. System Physiology – Animal

If the S-A node discharges at 0.00 seconds, when will the action potential normally arrive at the epicardial surface at the base of the left ventricle?

TLS Online TPP Program

#Question id: 353

#Unit 1. Molecules and their Interaction Relevant to Biology

Measurements show that the pH of a particular lake is 4.0. What is the hydrogen ion concentration of the lake?

TLS Online TPP Program

#Question id: 10694

#Unit 10. Ecological Principles

Which of the following is characteristic of parasitoid/ predators?

a) consumer usually larger than resource

b) Consumer requires one host for complete development.

c) Habitat independent

d) Consumer takes long time to kill host