To nucleate the assembly of branched actin filaments, Arp2/3 needs to be activated by a nucleation promoting factor (NPF)

TLS Online TPP Program

#Id: 8186

#Section 3: Genetics, Cellular and Molecular Biology

Glyoxysomes

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

TLS Online TPP Program

#Id: 8185

#Section 3: Genetics, Cellular and Molecular Biology

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: 8184

#Section 3: Genetics, Cellular and Molecular Biology

β oxidation

In mammalian cells, occurs in mitochondria & peroxisomes.

In yeast and plant cells, occurs in peroxisomes.

TLS Online TPP Program

#Id: 8183

#Section 3: Genetics, Cellular and Molecular Biology

β oxidation 

A major function of the oxidation reactions is the breakdown of fatty acid molecules.

TLS Online TPP Program

#Id: 8182

#Section 3: Genetics, Cellular and Molecular Biology

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

TLS Online TPP Program

#Id: 8181

#Section 3: Genetics, Cellular and Molecular Biology

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