In BER, The nick remaining after DNA polymerase I has dissociated is sealed by DNA ligase.

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.

TLS Online TPP Program

#Id: 8186

#Unit 2. Cellular Organization

Glyoxysomes

Conversion of fats to sugars is accomplished by a series of reactions known as the Glyoxylate cycle

TLS Online TPP Program

#Id: 8187

#Unit 2. Cellular Organization

Biosynthetic function of animal peroxisomes- 

Synthesis of cholesterol and dolichol 

Synthesis of bile acids in the liver 

Catalyze the first reactions in the formation of Plasmalogens