Noncoding RNAs, especially microRNAs, play a critical role in tumorigenesis:

Let-7 miRNAs

miR-15-a 

miR-16-1

miR-21

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#Id: 7810

#Unit 10. Ecological Principles

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#Id: 164

#Unit 5. Developmental Biology

The two major parts of the eye (lens and retina) co-construct each other, and the eye forms from reciprocal paracrine interactions.

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#Id: 984

#Unit 5. Developmental Biology

Drosophila eggs undergo superficial cleavage.

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#Id: 7317

#Unit 12. Applied Biology

Polyhydroxyalkanoates (PHAs) are a common bacterial storage polymer, and these readily biodegradable polymers have many of the desirable properties of xenobiotic plastics.

A PHA copolymer containing equal amounts of poly-β-hydroxybutryate(PHB) and poly-β-hydroxyvalerate(PHV).

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#Id: 6582

#Unit 7. System Physiology – Animal

Sertoli cells secrete 

Androgenbinding protein (ABP), inhibin, and MIS

The fluid in the lumen of the seminiferous tubules is quite different from plasma; it contains very little protein and glucose but is rich in androgens, estrogens, K+ , inositol, glutamic and aspartic acids.  Maintenance of its composition depends on the blood–testis barrier.