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TLS Online TPP Program

#Id: 1897

Three signals are required for activation of a naïve T cell


#Unit 4. Cell Communication and Cell Signaling #B and T cell receptors #Part B Pointers
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TLS Online TPP Program

#Id: 541

#Unit 2. Cellular Organization

Flagella may be:
1. Peritrichous
2. Monotrichous 
3. Lophotrichous
4. Amphitrichous 
TLS Online TPP Program

#Id: 542

#Unit 2. Cellular Organization

Hook and filament are composed of monomeric subunits (flagellin) arranged in a helical fashion. 
TLS Online TPP Program

#Id: 543

#Unit 2. Cellular Organization

Glycocalyx is a viscous polymer that is external to the cell wall and composed of polysaccharide, polypeptide, or both. For example: Bacillus anthracis produces a capsule of D-glutamic acid
TLS Online TPP Program

#Id: 544

#Unit 2. Cellular Organization

Capsules often protect pathogenic bacteria from phagocytosis by the host cells.
TLS Online TPP Program

#Id: 545

#Unit 2. Cellular Organization

In peptidoglycan the amino acids occur in an alternating pattern of D and L forms
TLS Online TPP Program

#Id: 546

#Unit 2. Cellular Organization

Racemase is responsible for converting D amino acid into L form.