Trombone” model for coordinating replication by two DNA polymerases at the E. coli replication fork

TLS Online TPP Program

#Id: 9182

#Unit 11. Evolution and Behavior

Selection coefficient

A related variable is the selection coefficient (s), which is the relative intensity of selection against a  genotype

TLS Online TPP Program

#Id: 7164

#Unit 5. Developmental Biology

One of the genes activated by VegT protein encodes the Sox17 transcription factor.

TLS Online TPP Program

#Id: 3800

#Unit 5. Developmental Biology

Dictyostelium can utilize one of three survival strategies when food starvation-

Microcyst formation, favoured in dark & wet conditions, or ammonia levels are high.

Zygote formation, favoured in dark & wet conditions, & is triggered by ethylene produced by the cells. 

Cell aggregation & differentiation

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#Id: 9235

#Unit 6. System Physiology – Plant

The C4 pathway, involving mesophyll cells and bundle-sheath cells, predominates in plants of tropical origin. 

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#Id: 5792

#Unit 7. System Physiology – Animal

When the peroxidase system is blocked or when it is hereditarily absent from the cells, the rate of formation of thyroid hormones falls to zero