TLS Online TPP Program

#Id: 7613

#Unit 5. Developmental Biology

Acrosomal enzymes (acrosin and MMP2) as well as the enzymes that help establish capacitation, are inhibited by zinc, the accumulation of zinc on the zona pellucida and in the surrounding cumulus form a “zinc shield” that prevents further sperm entry

TLS Online TPP Program

#Id: 9484

#Unit 6. System Physiology – Plant

An effector molecule is

made by a pathogen to enhance the pathogen’s colonizing

abilities.

TLS Online TPP Program

#Id: 8253

#Unit 1. Molecules and their Interaction Relevant to Biology

Spontaneous (or instantaneous) dipoles

When groups of electrons move to one end of the atom, it creates a dipole. 

TLS Online TPP Program

#Id: 7371

#Unit 5. Developmental Biology

The transcription factors encoded by the pair-rule genes activate the segment polarity genes, whose mRNA and protein products divide the embryo into 14-segment-wide units, establishing the periodicity of the embryo. 

TLS Online TPP Program

#Id: 1822

#Unit 10. Ecological Principles