For someone that has DAT Destroyer/Questions Ochem #9 and Bio #158

[2BDENT]

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Hopefully these questions are not already on this forum...I have a couple of questions from destroyer. I tried contacting Nancy, but have not got a response....Number 9 in OChem has me stumped....The question is as follows:

#9 Ochem If this molecule is heated, which COOH group will decarboxylate most easily?

I understand the answer is the beta keto acid, however, the picture shows choice c as the answer and I don't think this is beta to the keto group. Can someone explain? I thought the carbon next to the keto would be alpha and the next one would be beta. So choice B would have been my answer. I don't have a way of posting the molecule, so maybe someone with the 2008 version can help me out?

BIO Question. 158
I am having trouble with this question regarding how many chromatids an egg cell will contain. I understand that there are 23 chromosomes, but why only 23 chromatids?

From what I can find, chromosomes have 2 chromatids (I thought the answer should be 23 chroms and 46 chromatids). This is correct in question number 187. Can you clarify for me?

Any help is greatly appreciated.

 

[joonkimdds]

I understand the answer is the beta keto acid, however, the picture shows choice c as the answer and I don't think this is beta to the keto group. Can someone explain? I thought the carbon next to the keto would be alpha and the next one would be beta. So choice B would have been my answer. I don't have a way of posting the molecule, so maybe someone with the 2008 version can help me out?

bio 158 was asked about less than a week ago, i don't know if it was u who asked it or not but it was answered, and i saw it 2 days ago so it should be either on this page or page2~3. I don't remember the topic though but it was the exact same question.

C=O is keto group. The C of this keto group is called Sh#t.
the C next to this is alpha and the next is beta, thus choice C is beta C.
choice B carbon would be gamma (i think~ not that it's important)

 

[Maygyver]

Sex cells are somatic. 1n.

Hopefully these questions are not already on this forum...I have a couple of questions from destroyer. I tried contacting Nancy, but have not got a response....Number 9 in OChem has me stumped....The question is as follows:

#9 Ochem If this molecule is heated, which COOH group will decarboxylate most easily?

I understand the answer is the beta keto acid, however, the picture shows choice c as the answer and I don't think this is beta to the keto group. Can someone explain? I thought the carbon next to the keto would be alpha and the next one would be beta. So choice B would have been my answer. I don't have a way of posting the molecule, so maybe someone with the 2008 version can help me out?

BIO Question. 158
I am having trouble with this question regarding how many chromatids an egg cell will contain. I understand that there are 23 chromosomes, but why only 23 chromatids?

From what I can find, chromosomes have 2 chromatids (I thought the answer should be 23 chroms and 46 chromatids). This is correct in question number 187. Can you clarify for me?

Any help is greatly appreciated.

 

[chessxwizard]

It's because the egg isn't dividing.. therefore does not have replicated chromatids.

 

[2BDENT]

bio 158 was asked about less than a week ago, i don't know if it was u who asked it or not but it was answered, and i saw it 2 days ago so it should be either on this page or page2~3. I don't remember the topic though but it was the exact same question.

C=O is keto group. The C of this keto group is called Sh#t.
the C next to this is alpha and the next is beta, thus choice C is beta C.
choice B carbon would be gamma (i think~ not that it's important)

Thanks all of you....I see it clearly now. I think I have brain overload. I have been studying nonstop and take the test this Friday!