dat destroyer 2011 version ( funny mistake !)

[shareshab]

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hey guys DAT destroyer made funny mistake ( 2011) on bio section question number 24 solution : plant cell wall made of chitin !!!! i think plant cell wall made of cellulose and not chitin !

 

[dstu2011]

hey guys DAT destroyer made funny mistake ( 2011) on bio section question number 24 solution : plant cell wall made of chitin !!!! i think plant cell wall made of cellulose and not chitin !

I think it needs to be more specific. Plants on mars have walls made of chitin. Here on earth its made of cellulose and chitin has shifted over towards insects and arthopods and the such. The questions on the DAT will be more specific than this.

 

[shareshab]

I think it needs to be more specific. Plants on mars have walls made of chitin. Here on earth its made of cellulose and chitin has shifted over towards insects and arthopods and the such. The questions on the DAT will be more specific than this.

 

[shareshab]

o my go-d look at question number 70 solution on bio it said gluconeogenesis occurs mainly in THE CYTOSOL !!!!!!!!!!!!!!!!! WRONG : it happens in the liver !!

 

[dstu2011]

o my go-d look at question number 70 solution on bio it said gluconeogenesis occurs mainly in THE CYTOSOL !!!!!!!!!!!!!!!!! WRONG : it happens in the liver !!

Not sure if that was sarcasm. Yes gluconeogenesis does occur in the liver and kidneys. But thats not what the question is asking, and anyways, gluconeogenesis does occur mainly in the cytosol because the majority of the enzymes are located in the cytosol. It starts in the mitochondria, but the majority of it occurs in cytosol and the conversion of G6P to Glucose is in the ER.

 

[shareshab]

Not sure if that was sarcasm. Yes gluconeogenesis does occur in the liver and kidneys. But thats not what the question is asking, and anyways, gluconeogenesis does occur mainly in the cytosol because the majority of the enzymes are located in the cytosol. It starts in the mitochondria, but the majority of it occurs in cytosol and the conversion of G6P to Glucose is in the ER.

oh got u thank u

 

[invictusx]

Not sure if that was sarcasm. Yes gluconeogenesis does occur in the liver and kidneys. But thats not what the question is asking, and anyways, gluconeogenesis does occur mainly in the cytosol because the majority of the enzymes are located in the cytosol. It starts in the mitochondria, but the majority of it occurs in cytosol and the conversion of G6P to Glucose is in the ER.

I'm not going to lie but I had a good laugh at the first sentence. Shareshab, you need to get the facts straight and think a bit more thoroughly. Everything that dstu2011 said is correct. It does start in the matrix of the mitochondria as pyruvate, which is converted into OAA through pyruvate carboxylase (you use OAA [oxaloacetate] as a medium to transport protons through the matrix because OAA is compartmentalized and therefore cannot pass the phosphobiplid membrane, thus it is converted into malate first and then exits the matrix through a transporter and then gets converted back into OAA and gluconeogenesis resumes). After OAA is in the cytosol of the cell, it is converted to PEP with PEP carboxykinase, which decarboxylates and phosphorylates OAA. The reason for the initial carboxylation is to make sure the decarboxylation step with PEP carboxykinase can drive the reaction into PEP [phosphoenolpyruvate] because of the -deltaG (exergonic reaction). PEP is the committed step in gluconeogenesis because it is essentially irreversible to convert it back into OAA.

 

[shedara2008]

i thought is was fungus that have walls with chitin in the cells..

 

[104]

🙂

 

[voager]

Chitin serves as a​

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structural molecule in the walls of fungus cells and in the exoskeletons of insects,other arthropods, and mollusks. ​

 

[shareshab]

Chitin serves as a​

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structural molecule in the walls of fungus cells and in the exoskeletons of insects,other arthropods, and mollusks. ​

so base on this dat destoryer sucks

 

[chance8]

Yup, that's right. Gluconeogenesis reactions happen in the cytosol and mitochondria of the liver (and kidney cortex if you are starved)

Fungi cell walls can be made of chitin. Plant cell walls are made of cellulose.

Not sure if that was sarcasm. Yes gluconeogenesis does occur in the liver and kidneys. But thats not what the question is asking, and anyways, gluconeogenesis does occur mainly in the cytosol because the majority of the enzymes are located in the cytosol. It starts in the mitochondria, but the majority of it occurs in cytosol and the conversion of G6P to Glucose is in the ER.