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August 20, 2025, 05:01:10 am
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Author Topic: Biology Unit 4 Questions Megathread  (Read 60565 times)  Share 

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Inside Out

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Re: Biology Unit 4 Questions Megathread
« Reply #30 on: July 07, 2011, 02:02:14 pm »
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what do u call DNA that doesnt code for protein but codes for something else
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epinephrine

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Re: Biology Unit 4 Questions Megathread
« Reply #31 on: July 08, 2011, 01:28:59 am »
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Do all polypeptides have methionine as the first amino acid since it is coded by AUG?

EDIT: Why am I so dumb? Haha of course they do but I forgot to realize that post-transcriptional modification of the primary transcript or pre-mRNA would simply remove this amino acid if it is not vital for the polypeptide's primary structure


Do exons consist of promoter regions, exons and introns?



Quote from: Hercules on July 07, 2011, 01:58:34 pm
so wats spacer DNA. is it the same as/include introns?
and is genome a set no. for each organism or is it just a term to describe the total set of genetic material

For the latter part of your question, recall that genome varies for different species (e.g. human genome, wallaby genome etc.) hence your first part is correct.

For the first part of your question have a read of your text-book for exact definition and it is not the same as introns because introns are transcribed whereas spacer DNA is not transcribed.

Hope that helps.
« Last Edit: July 08, 2011, 09:37:36 am by Russ »
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Russ

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Re: Biology Unit 4 Questions Megathread
« Reply #32 on: July 08, 2011, 09:40:09 am »
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In future, don't quintuple post. I merged and deleted the five individual posts for you.

Quote
post-transcriptional modification of the primary transcript or pre-mRNA would simply remove this amino acid if it is not vital for the polypeptide's primary structure

Post transcriptional won't remove any amino acids, since there aren't any present yet (semantics I guess).

Quote
Do exons consist of promoter regions, exons and introns?

No...typo?
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epinephrine

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Re: Biology Unit 4 Questions Megathread
« Reply #33 on: July 08, 2011, 02:24:17 pm »
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For the second part its the definition in Heinemann 2 biology so yeah I thought it was a typo aswell ?

Oh and for the first part I have no idea why I even said post-transcriptional modification would remove amino acids haha this is what happens to me
when I stay up pretty late  :P
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Russ

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Re: Biology Unit 4 Questions Megathread
« Reply #34 on: July 08, 2011, 02:30:03 pm »
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Then in that case yeah, it's a typo.
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HERculina

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Re: Biology Unit 4 Questions Megathread
« Reply #35 on: July 08, 2011, 02:50:12 pm »
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what textbook is the best to use for unit 4?  :)
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WhoTookMyUsername

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Re: Biology Unit 4 Questions Megathread
« Reply #36 on: July 08, 2011, 03:01:18 pm »
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Quote from: epinephrine on July 08, 2011, 02:24:17 pm
For the second part its the definition in Heinemann 2 biology so yeah I thought it was a typo aswell ?

Oh and for the first part I have no idea why I even said post-transcriptional modification would remove amino acids haha this is what happens to me
when I stay up pretty late  :P

lol

we don't need a textbook to tell us exons include exons
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Mr. Study

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Re: Biology Unit 4 Questions Megathread
« Reply #37 on: July 08, 2011, 06:56:12 pm »
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For the Nature of Biology Book Chapter 14, which parts should I write into my notes?

Thank you very much! :)
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HERculina

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Re: Biology Unit 4 Questions Megathread
« Reply #38 on: July 08, 2011, 06:58:55 pm »
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D: chapter 14 already?  thats evolution!
i  beetter get a move on :|

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pi

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Re: Biology Unit 4 Questions Megathread
« Reply #39 on: July 09, 2011, 12:48:54 pm »
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Quote from: Hercules on July 08, 2011, 02:50:12 pm
what textbook is the best to use for unit 4?  :)


I didn't really use a textbook for unit 4, all of them (at least I found) have a lot of unnecessary material. I just lived off biozone, and later, tsfx notes. (I got 70+ for that exam too :) )

But generally speaking NoB is always the best



Quote from: epinephrine on July 08, 2011, 01:28:59 am
Do all polypeptides have methionine as the first amino acid since it is coded by AUG?

EDIT: Why am I so dumb? Haha of course they do but I forgot to realize that post-transcriptional modification of the primary transcript or pre-mRNA would simply remove this amino acid if it is not vital for the polypeptide's primary structure

AND, in some prokaryotes, GUG and UUG are sometimes used as the 'start' codon.



Quote from: black eyed peas on July 07, 2011, 02:02:14 pm
what do u call DNA that doesnt code for protein but codes for something else

Called: 'Non-coding DNA' (NOT necessarily 'Junk DNA'!)
« Last Edit: July 09, 2011, 03:20:21 pm by Rohitpi »
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epinephrine

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Re: Biology Unit 4 Questions Megathread
« Reply #40 on: July 09, 2011, 07:38:52 pm »
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Wait pi did you get 70+/75 for unit 4?

If so how did you not get 45+ as your study score ???

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« Last Edit: January 02, 2017, 07:28:37 pm by pi »
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pi

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Re: Biology Unit 4 Questions Megathread
« Reply #41 on: July 10, 2011, 06:54:38 pm »
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Quote from: epinephrine on July 09, 2011, 07:38:52 pm
Wait pi did you get 70+/75 for unit 4?

If so how did you not get 45+ as your study score ???

An 'A' mid-year. Probably should have studied for it.

And I also didn't find bio very interesting in unit 3. It's hard to work well if its not interesting (...physics :( )

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« Last Edit: January 02, 2017, 07:28:24 pm by pi »
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epinephrine

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Re: Biology Unit 4 Questions Megathread
« Reply #42 on: July 11, 2011, 05:00:04 am »
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@pi: what was your overall SACs grade?

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« Last Edit: January 02, 2017, 07:26:41 pm by pi »
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pi

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Re: Biology Unit 4 Questions Megathread
« Reply #43 on: July 11, 2011, 01:43:23 pm »
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Quote from: epinephrine on July 11, 2011, 05:00:04 am
@pi: what was your overall SACs grade?

A+

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« Last Edit: January 02, 2017, 07:27:24 pm by pi »
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WhoTookMyUsername

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Re: Biology Unit 4 Questions Megathread
« Reply #44 on: July 11, 2011, 01:49:16 pm »
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Quote from: pi on July 11, 2011, 01:43:23 pm
Quote from: epinephrine on July 11, 2011, 05:00:04 am
@pi: what was your overall SACs grade?

A+

who was your teacher?

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« Last Edit: January 02, 2017, 07:29:28 pm by pi »
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