In a covalent bond, electrons are shared between atoms. In an ionic bond, electrons are transferred between atoms.

TLS Online TPP Program

#Id: 7762

#Section 2: General Biology

In a covalent bond, electrons are shared between atoms. In an ionic bond, electrons are transferred between atoms.

TLS Online TPP Program

#Id: 9283

#Section 2: General Biology

Three factors are important in maintaining low O2 concentrations in nodules. 

First, entry of O2 into the nodule is controlled by a variable‐permeability barrier in the nodule parenchyma

TLS Online TPP Program

#Id: 9284

#Section 2: General Biology

O2‐binding plant protein Lb plays an active role in regulating and delivering O2 in the infected cells

Bacterial respiration is the major O2 sink

TLS Online TPP Program

#Id: 9285

#Section 2: General Biology

O2‐sensitive hemoprotein kinase FixL controls a regulatory cascade that activates transcription of nitrogen fixation genes

TLS Online TPP Program

#Id: 9286

#Section 2: General Biology

Plant glutamine synthetase (GS) and NADH‐dependent glutamate synthase (NADH‐GOGAT) are responsible for the initial massimilation of ammonia into organic compounds

TLS Online TPP Program

#Id: 9287

#Section 2: General Biology

TLS Online TPP Program

#Id: 9288

#Section 2: General Biology