Tubulin dimers in which the β-subunit has bound GTP are added preferentially to (+) end of the microtubule.

TLS Online TPP Program

#Id: 6349

#Unit 8. Inheritance Biology

Dosage compensation

Equalization in males and females of the amount of protein produced by X-linked genes.

Each female cell one of the two X chromosome becomes inactive. Which X chromosome is inactivated is random.

The Xist (X inactive specific transcript) gene located on the X chromosome, in required for inactivation. 

TLS Online TPP Program

#Id: 6215

#Unit 12. Applied Biology

These vectors are advantageous in that they can deliver many genome copies per host cell and so typically are associated with high expression. 

TLS Online TPP Program

#Id: 9824

#Unit 6. System Physiology – Plant

Plants that increase stem extension in response to shading are said to exhibit a shade avoidance response.

As shading increases, the R:FR ratio decreases. Shade means far red light

TLS Online TPP Program

#Id: 709

#Unit 3. Fundamental Processes

A locus called dat has a large concentration of DnaA-binding sites. It binds about 80 more DnaA molecules than the origin.

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#Id: 1967

#Unit 10. Ecological Principles