The sigma cycle. RNA polymerase binds to the promoter causing local melting of the DNA. As the polymerase moves elongating the RNA, the s-factor dissociates and joins with a new core polymerase to initiate another RNA chain.

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#Unit 6. System Physiology – Plant

Gibberellins are synthesized via the terpenoid pathway in three stages in Apical Tissues

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#Unit 7. System Physiology – Animal

In humans,

Only one of the follicles in one ovary starts to grow rapidly and becomes the dominant follicle, while the others regress, forming atretic follicles.

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#Unit 7. System Physiology – Animal

Inhibin is produced by ovarian granulosa cells, Inhibits FSH secretion from the anterior pituitary.

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#Unit 6. System Physiology – Plant

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#Unit 6. System Physiology – Plant

The genes for both of these proteins—RBCS and LHCB (also called CAB) —are present in multiple copies in the genome.