Once an enzyme makes a transcript longer than 10 nucleotides, it is said to have escaped the promoter. At this point, it has formed a stable ternary complex, containing enzyme, DNA, and RNA. This is the transition to the elongation phase.

TLS Online TPP Program

#Id: 6013

#Unit 3. Fundamental Processes

The presence of Cdc6 and Cdt1 at the yeast origin allows the MCM proteins to bind to the complex in G1 in the inactive state.

TLS Online TPP Program

#Id: 9825

#Unit 6. System Physiology – Plant

phyB–phyE, appear mostly light-stable in the plant and function primarily in the regulation of LFRs and of shade avoidance involving changes in the R:FR ratio.

TLS Online TPP Program

#Id: 9430

#Unit 11. Evolution and Behavior

Bateman’s principle

In most cases, it is the male’s secondary sexual traits that are exaggerated.

This shows that sexual selection is more common and intense on males than females

TLS Online TPP Program

#Id: 8017

#Unit 10. Ecological Principles

Ecological compression

Short term evolutionary response

More number of species coexist together

Non inheritable trait

Not change habitat but reduce the food range

TLS Online TPP Program

#Id: 6422

#Unit 8. Inheritance Biology

Autosomal Recessive Traits

Autosomal recessive traits normally appear with equal frequency in both sexes.

The trait seems to skip generations.

When both parents are heterozygous, approximately one-fourth of the offspring are expected to express the trait.

Recessive traits appear more frequently among the offspring of consanguineous matings.

Example - Tay–Sachs disease, sickle cell anemia, cystic fibrosis, PKU