TLS Online TPP Program

#Id: 7200

#Unit 5. Developmental Biology

One individual, however, expresses only a small number of these molecules—up to six different class I molecules and 12 or more different class II molecules.

TLS Online TPP Program

#Id: 3536

#Unit 2. Cellular Organization

Human mitochondrial DNA has 22 tRNA genes, 2 rRNA genes, and 13 protein-coding regions. 

TLS Online TPP Program

#Id: 6943

#Unit 8. Inheritance Biology

Inversion homozygous - No special problems arise in meiosis. Inversion heterozygous - Two chromosomes form an inversion loop

TLS Online TPP Program

#Id: 6783

#Unit 3. Fundamental Processes

cas1, cas2, and cas4 required to create protospacer sequences Cas1 is  integrase, whereas Cas2 is a ribonuclease. In contrast, of other Cas proteins, Cas6 is involved in expression and processing of the CRISPR cluster and Cas3 in the interference of viral infection.

TLS Online TPP Program

#Id: 8446

#Unit 1. Molecules and their Interaction Relevant to Biology

In the α helix, the backbone hydrogen bonds are arranged such that the peptide CO bond of the nth residue points along the helix axis toward the peptide NH group of the (n + 4)th residue.