C. elegans oocyte use the “partitioning-defective,” or PAR proteins, in establishing cell polarity. 

TLS Online TPP Program

#Id: 4566

#Unit 8. Inheritance Biology

DOMINANT EPISTASIS

In dominant epistasis, however, only a single copy of an allele is required to inhibit the expression of an allele at a different locus.

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#Id: 5535

#Unit 7. System Physiology – Animal

The ascending limb, both the thin & the thick segments is virtually impermeable to water, a characteristic that is important for concentrating the urine.

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#Id: 7154

#Unit 6. System Physiology – Plant

Two additional proteins and two histone deacetylase enzymes (HDA6 and HDA19) act as co-repressors along with the JAZ–COI1 complex and are instrumental in maintaining the chromatin in an inactive state.

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#Id: 8709

#Unit 1. Molecules and their Interaction Relevant to Biology

Malonate is an analog of succinate not normally present in cells, is a strong competitive inhibitor of succinate dehydrogenase, and its addition to mitochondria blocks the activity of the citric acid cycle.

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#Id: 1491

#Unit 4. Cell Communication and Cell Signaling

p53 protein product is regulated by a protein called MDM2, which works through a negative feedback loop.