G1/S Cyclin–CDKs

In human - cyclin E-CDK 2 

In budding yeast - CIn 1/2-Cdc 28

TLS Online TPP Program

#Id: 8037

#Section 2: General Biology

Lys & Arg have ionisation series

1------pK1-----pK2--------pKr------14

TLS Online TPP Program

#Id: 8158

#Section 3: Genetics, Cellular and Molecular Biology

Soluble ER-resident proteins contain C-terminal KDEL sorting signal that allows them to be retrieved. 

TLS Online TPP Program

#Id: 9202

#Section 3: Genetics, Cellular and Molecular Biology

Disruptive Natural selection

Disruptive selection favors the survival of individuals at both extremes of a range, rather than the  intermediate.

Increase variance in the population because select those phenotype which are away from mean.

It maintain balance polymorphism and maximum selection coefficient value.

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#Id: 8127

#Section 2: General Biology

β-Carotene is the precursor of vitamin A1.
Oxidation at C-15 converts retinol to the aldehyde, retinal, and further oxidation produces retinoic acid, a hormone that regulates gene expression. 

TLS Online TPP Program

#Id: 8117

#Section 2: General Biology