In skeletal muscle cells, 

a low cytosolic Ca+2 level is maintained by a unique Ca+2 ATPase that continually pumps Ca+2 ions from

the cytosol containing the myofibrils into the SR, establishes a reservoir of Ca+2 in the SR.

TLS Online TPP Program

#Id: 1528

#Unit 2. Cellular Organization

Many MAPs are positively charged and bind to microtubles through electrostatic interactions.

TLS Online TPP Program

#Id: 2435

#Unit 3. Fundamental Processes

Rho is a member of the family of hexameric ATP-dependent helicases. Each subunit has an RNA-binding domain and an ATP hydrolysis domain. 

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#Id: 9773

#Unit 6. System Physiology – Plant

In Arabidopsis, PTI induces production of indole glucosinolates, to control of fungal pathogens. 

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#Id: 6059

#Unit 10. Ecological Principles

Tundra:   Tundra is found at high latitudes, adjacent to ice margins, where insolation is low.  Tundra is the youngest of all biomes as it was formed after the retreat of glaciers 10000 years ago.  Lack of light and rainfall mean (25 cm per year) that rates of photosynthesis and productivity are low. Large part of the year, water can be locked away in permafrost, a layer of permanently frozen soil below 0.5–1 m.

TLS Online TPP Program

#Id: 7998

#Unit 10. Ecological Principles

The fundamental niche of a species is the range of abiotic conditions under which species can persist. 

This includes the range of temperature, humidity, and salinity conditions that allow a population to survive, grow, and reproduce.