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TLS Online TPP Program

#Id: 3517

A gene family is defined as a group of genes that encode related or identical products as a result of gene-duplication events.

#Unit 2. Cellular Organization #CELL CYCLE #Part B Pointers
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TLS Online TPP Program

#Id: 3201

#Unit 3. Fundamental Processes

Nucleotide excision repair (NER) systems excise a sequence that includes the damaged base(s). a new stretch of DNA is then synthesized to replace the excised material.
TLS Online TPP Program

#Id: 3202

#Unit 3. Fundamental Processes

Repair systems recognize DNA sequences that do not conform to standard base pairs.
TLS Online TPP Program

#Id: 3203

#Unit 3. Fundamental Processes

Excision systems remove one strand of DNA at the site of damage and then replace it.
TLS Online TPP Program

#Id: 3204

#Unit 3. Fundamental Processes

Recombination-repair systems use recombination to replace the double-stranded region that has been damaged.
TLS Online TPP Program

#Id: 3205

#Unit 3. Fundamental Processes

.All these systems are prone to introducing errors during the repair process. 
TLS Online TPP Program

#Id: 3206

#Unit 3. Fundamental Processes

Photoreactivation is a nonmutagenic repair system that acts specifically on pyrimidine dimers