The biosynthesis of gibberellins is under strict genetic, developmental, and environmental control, and numerous gibberellin-deficient mutants have been isolated. 

Mendel’s tall/dwarf alleles in peas are a famous example. Such mutants have been useful in elucidating the complex pathways of gibberellin biosynthesis.

TLS Online TPP Program

#Id: 8764

#Unit 1. Molecules and their Interaction Relevant to Biology

Some thermostable proteins are stabilized by an increased size of the protein’s hydrophobic core, an increased size of the interface between its domains and/or subunits, and a more tightly packed core as evidenced by a reduced surface-to-volume ratio.

TLS Online TPP Program

#Id: 3279

#Unit 3. Fundamental Processes

 In Escherichia coli, mismatches are detected by a dimer of the mismatch repair protein MutS.

TLS Online TPP Program

#Id: 5029

#Unit 3. Fundamental Processes

A cycle of chromosome replication must be initiated at a fixed time of C + D =60 minutes before cell division.

TLS Online TPP Program

#Id: 2673

#Unit 7. System Physiology – Animal

Positive charge forces cations such as Mg++ and Ca++ to diffuse from the tubular lumen through the paracellular space and into the interstitial fluid.

TLS Online TPP Program

#Id: 7821

#Unit 10. Ecological Principles

Supercooling – This is ability to withstand freezing