MHC-Peptide Interaction

TLS Online TPP Program

#Id: 8400

#Section 3: Genetics, Cellular and Molecular Biology

In skeletal muscle cells, 

a low cytosolic Ca+2 level is maintained by a unique Ca+2 ATPase that continually pumps Ca+2 ions from

the cytosol containing the myofibrils into the SR, establishes a reservoir of Ca+2 in the SR.

TLS Online TPP Program

#Id: 9207

#Section 3: Genetics, Cellular and Molecular Biology

TLS Online TPP Program

#Id: 8869

#Section 3: Genetics, Cellular and Molecular Biology

Yeast cells with a defective wee1+ gene activate mitotic CDKs prematurely and premature entry into mitosis (smaller than normal cells

TLS Online TPP Program

#Id: 9189

#Section 3: Genetics, Cellular and Molecular Biology

Overdominance the heterozygote has higher fitness than the  fitnesses of the two homozygotes

Underdominance, in which the heterozygote has lower fitness than both homozygotes.

Directional selection leads to fixation of the favored allele and elimination of the other allele, as  long as no other evolutionary forces act on the population.

TLS Online TPP Program

#Id: 3777

#Section 2: General Biology

The diameter of the nucleus is in the range of 1.75 fm (1.75 × 10⁻¹⁵m) for hydrogen.