This consensus sequence was derived by aligning 300 sequences known to function as s70 promoters and ascertaining the most common base found at each position in the –35 and –10 hexamers.

TLS Online TPP Program

#Id: 8098

#Unit 1. Molecules and their Interaction Relevant to Biology

The surfaces of the cells that form the alveoli (small air spaces of the lung) are coated with surfactant, which decreases the alveolar surface tension. 

Lung surfactant contains 80 to 90% phospholipid by weight, and 70 to 80% of the phospholipid is phosphatidylcholine, mostly the dipalmitoyl species.

TLS Online TPP Program

#Id: 7263

#Unit 6. System Physiology – Plant

Form I is found in most autotrophic organisms. Contributing up to 50% of soluble leaf protein, it is the predominant protein in plant leaves.

TLS Online TPP Program

#Id: 938

#Unit 5. Developmental Biology

Induced pluripotent stem cell (iPSC) with the pluripotency of an embryonic stem cell. These genes were 

a. Sox2 and Oct4 (Oct3, Oct3/4, and Pou5f1) -which activated Nanog and other transcription factors that   established pluripotency and blocked differentiation

b. c-Myc which opened up chromatin and made the genes accessible to Sox2, Oct4, and Nanog

c. Klf4 -which prevents cell death

TLS Online TPP Program

#Id: 3802

#Unit 5. Developmental Biology

During growth, unicellular D. discoideum monitor their cell density relative to that of their bacterial food source by secreting a glycoprotein called prestarvation factor at a constant rate.

TLS Online TPP Program

#Id: 9395

#Unit 11. Evolution and Behavior

Associative learning – Animal learn the relationship between two events