A lesion that interrupts one optic nerve causes blindness in that eye.

TLS Online TPP Program

#Id: 9278

#Unit 6. System Physiology – Plant

Type III/Type IV secretion systems play a major role in transfer of bacterial Nod factor in plant cell. 

TLS Online TPP Program

#Id: 2110

#Unit 8. Inheritance Biology

Deletions are lethal in the homozygous state because all copies of any essential genes located in the deleted region are missing.

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#Id: 7208

#Unit 5. Developmental Biology

Expression of class II molecules by B cells is down-regulated by IFN-¥. 

TLS Online TPP Program

#Id: 7428

#Unit 5. Developmental Biology

Early on during aggregation, gene expression requires the activity of cAMP-dependent protein kinase.

TLS Online TPP Program

#Id: 9626

#Unit 4. Cell Communication and Cell Signaling

Following binding of an EGF ligand, the rate of endocytosis of HER1 is increased about tenfold, and only a fraction of the internalized receptors return to the plasma membrane; the rest are degraded in lysosomes.