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TLS Online TPP Program

#Id: 3217

The Uvr system makes incisions -12 bases apart on both sides of damaged DNA, removes the DNA between them, and resynthesizes new DNA.

#Unit 3. Fundamental Processes #DNA damage and repair mechanisms #Part B Pointers
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TLS Online TPP Program

#Id: 8180

#Unit 2. Cellular Organization

Peroxisomes carry out oxidation reactions leading to the production of hydrogen peroxide.
TLS Online TPP Program

#Id: 8181

#Unit 2. Cellular Organization

Catalase uses the H2O2 to oxidize a variety of other substrates (formic acid, formaldehyde, and alcohol) by the “peroxidation” reaction.
TLS Online TPP Program

#Id: 8182

#Unit 2. Cellular Organization

When excess H2O2 accumulates in the cell, catalase converts it to H2O through the reaction.
TLS Online TPP Program

#Id: 8183

#Unit 2. Cellular Organization

β oxidation 
A major function of the oxidation reactions is the breakdown of fatty acid molecules.
TLS Online TPP Program

#Id: 8184

#Unit 2. Cellular Organization

β oxidation
In mammalian cells, occurs in mitochondria & peroxisomes.
In yeast and plant cells, occurs in peroxisomes.
TLS Online TPP Program

#Id: 8185

#Unit 2. Cellular Organization

Two types of plant peroxisomes:
Present in leaves - participates in photorespiration.
Present in germinating seeds (glyoxysomes) - converts fatty acids into sugars.