The zona pellucida in mammals plays a role analogous to that of the vitelline envelope in invertebrates; the zona, however, is a far thicker and denser structure than the vitelline envelope

TLS Online TPP Program

#Id: 344

#Unit 1. Molecules and their Interaction Relevant to Biology

The liver PK isozyme (L form) is regulated by glucagon

TLS Online TPP Program

#Id: 2419

#Unit 3. Fundamental Processes

Termination depends on the RNA product and is not determined simply by scrutiny of the DNA sequence during transcription.

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#Id: 1049

#Unit 5. Developmental Biology

The apical ectodermal ridge is a thickening of the ectoderm at the apex of the developing limb bud.

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#Id: 4244

#Unit 12. Applied Biology

The culture medium provides the necessary nutrients, growth factors, and hormones for cell growth, as well as regulating the pH and the osmotic pressure of the culture.

TLS Online TPP Program

#Id: 7559

#Unit 6. System Physiology – Plant

Many plant tissues contain the enzyme cytokinin oxidase, which cleaves the side chain from zeatin (both cis and trans), zeatin riboside, iP, and their N-glucosides, but not their O-glucoside derivatives