For monosaccharides with two or more asymmetric carbons, the prefix d or l refers to the configuration of the highest numbered asymmetric carbon (the asymmetric carbon farthest from the carbonyl carbon).

TLS Online TPP Program

#Id: 8098

#XL - T Zoology

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: 9417

#XL - T Zoology

The second part of Darwin’s hypothesis is that exaggerated secondary sexual traits decrease survival.

TLS Online TPP Program

#Id: 8853

#XL - T Zoology

Cohesins 

The protein ring complexes that establish linkages between sister chromatids

TLS Online TPP Program

#Id: 7887

#XL - Q Biochemistry

In highly polarized cells, mitochondria can move long distances being propelled along microtubule tracks

TLS Online TPP Program

#Id: 10313

#XL - Q Biochemistry

The Immune system is a second line of defense against cancer formation