Gyrase, a type II topoisomerase, provides a swivel that allows one DNA strand to rotate around the other.

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#Id: 3130

#Unit 3. Fundamental Processes

Replication inserts the normal (nonmodified) bases into the daughter strands. This generates hemimethylated DNA, in which one strand is methylated and one strand is unmethylated.

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#Id: 947

#Unit 5. Developmental Biology

Resact from Arbacia egg jelly binds to its receptor on the sperm, activates the receptor’s guanylyl cyclase (RGC) activity.

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#Id: 9913

#Unit 4. Cell Communication and Cell Signaling

Infectious diseases are disorders caused by organisms — such as bacteria, viruses, fungi or parasites

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#Id: 8791

#Unit 10. Ecological Principles

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#Id: 1248

#Unit 7. System Physiology – Animal

Before puberty, growth hormone excess causes gigantism