Valyl-tRNA synthetase can sterically exclude isoleucine from its catalytic pocket because isoleucine is larger than valine.

TLS Online TPP Program

#Id: 2921

#Unit 13. Methods in Biology

RCF units are therefore dimensionless (denoting multiples of g) and revolutions per
minute are usually abbreviated as r.p.m.

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#Id: 7333

#Unit 11. Evolution and Behavior

When a population is in Hardy-Weinberg equilibrium, the genotypic frequencies are determined by the allelic  frequencies.

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#Id: 8665

#Unit 10. Ecological Principles

Lack of environmental constraints hypothesis suggests preadaptation of some invaders to existing environmental conditions.

With few limitations to many abiotic environments, these invaders can grow quickly and outcompete native species

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#Id: 2126

#Unit 8. Inheritance Biology

An inversion may break a gene into two parts, with one part moving to a new location and destroying the function of that gene.

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#Id: 3775

#Unit 1. Molecules and their Interaction Relevant to Biology

The electrons revolve in orbits around the nucleus.