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March 28, 2024, 08:24:03 pm

Author Topic: VCE Biology Question Thread  (Read 3570336 times)  Share 

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Poet

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Re: VCE Biology Question Thread
« Reply #9915 on: February 28, 2018, 09:53:32 am »
0
Hi.
Just wondering, during condensation polymerisation of nucleotides to make DNA, does it output H2O or 2 phosphates?
My teacher said H2O, however edrolo said 2 phosphates, so not really sure now.
Thanks! ;)

Hi Molly!
Did Edrolo really say the product was two phosphate groups? That's interesting. Maybe report that in, because your teacher is right, the product of the bond between the OH and H is water, or H2O. 👍 :)
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Re: VCE Biology Question Thread
« Reply #9916 on: February 28, 2018, 10:22:21 am »
+4
Hi Molly!
Did Edrolo really say the product was two phosphate groups? That's interesting. Maybe report that in, because your teacher is right, the product of the bond between the OH and H is water, or H2O. 👍 :)

Edit: however, condensation polymerisation isn't done in the process of making DNA, it's used in polypeptide synthesis. Maybe you're mixing up these two processes. :)

Condensation polymerisation occurs for nucleic acids too (but yes, in VCE the focus is on proteins for this type of reaction)

mollyf21

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Re: VCE Biology Question Thread
« Reply #9917 on: February 28, 2018, 06:59:59 pm »
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Hi.
Just wondering, during condensation polymerisation of nucleotides to make DNA, does it output H2O or 2 phosphates?
My teacher said H2O, however edrolo said 2 phosphates, so not really sure now.
Thanks! ;)

Thanks! So does that mean that it would be the same for nucleotides?

Sine

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Re: VCE Biology Question Thread
« Reply #9918 on: February 28, 2018, 07:09:23 pm »
+3
Thanks! So does that mean that it would be the same for nucleotides?
condensation polymerisation can occur for carbohydrates (e.g. glucose), nucleic acids, amino acids and as a result of the reaction all of them produce H20

mollyf21

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Re: VCE Biology Question Thread
« Reply #9919 on: February 28, 2018, 08:32:19 pm »
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condensation polymerisation can occur for carbohydrates (e.g. glucose), nucleic acids, amino acids and as a result of the reaction all of them produce H20
Thank you so much!

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Re: VCE Biology Question Thread
« Reply #9920 on: March 09, 2018, 11:59:25 am »
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Fluid replacements are usually provided for heavily perspiring athletes after endurance events. Identify preferable replacement drinks tonicity (hyper, hypo, iso). Give a reason for your answer.

Question from online^^^

I was thinking hypertonic, not sure how to explain.

Bell9565

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Re: VCE Biology Question Thread
« Reply #9921 on: March 09, 2018, 01:09:29 pm »
+1
Fluid replacements are usually provided for heavily perspiring athletes after endurance events. Identify preferable replacement drinks tonicity (hyper, hypo, iso). Give a reason for your answer.

Question from online^^^

I was thinking hypertonic, not sure how to explain.
Isotonic as it increases their water levels to replace fluid lost via perspiration.
It's also why they use saline drips (which are isotonic) to increase hydration levels in patients in hospitals.
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Al Dem

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Re: VCE Biology Question Thread
« Reply #9922 on: March 10, 2018, 01:10:29 pm »
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Hey I had difficulty answering these questions (from biozone):

How can simple nucleotide units combine to store genetic information?
Describe the consequence of the degeneracy of the genetic code to the likely effect of a change to one base in a triplet
Explain why RNA strand is synthesized 5' to 3'

Any help is much appreciated :)

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HighSchoolerRS

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Re: VCE Biology Question Thread
« Reply #9923 on: March 10, 2018, 03:05:56 pm »
+1
Hey I had difficulty answering these questions (from biozone):

How can simple nucleotide units combine to store genetic information?
Describe the consequence of the degeneracy of the genetic code to the likely effect of a change to one base in a triplet
Explain why RNA strand is synthesized 5' to 3'

Any help is much appreciated :)



The sequence of nucleotides stores information as it determines the sequence of amino acids in a protein.
The degeneracy of the genetic code refers to the fact that one amino acid may be coded for by more than one codon. Therefore, the change of one base in a triplet does not necessarily mean that the amino acid that that triplet codes for is different.
RNA polymerase reads the template strand 3'-5' which means that the mRNA strand that is synthesised is 5'-3'.

I don't know if I have explained this right but I hope it helped :)



Hi guys. In an experiment investigating the effect of wavelength of light on the rate of photosynthesis, would the control group have no light or white light?
Thanks!

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Re: VCE Biology Question Thread
« Reply #9924 on: March 10, 2018, 03:09:46 pm »
+1
Hi guys. In an experiment investigating the effect of wavelength of light on the rate of photosynthesis, would the control group have no light or white light?
Thanks!
You would normally have both. The white light is a positive control, no light is a negative control.
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Re: VCE Biology Question Thread
« Reply #9925 on: March 10, 2018, 08:13:45 pm »
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Hi all! We've just finished the 'Structure and regulation of biochemical pathways' section of Bio 3/4 but our teacher completely skipped over a certain dot point in the study design which looks pretty significant (bc it's in the study design lol). It's this dot point:

- The cycling of coenzymes (ATP, NADH, and NADPH) as loaded and unloaded forms to move energy, protons and electrons between reactions in the cell

I was wondering if anyone could give a summary of what I need to know? It doesn't have to be too detailed because that's probably asking too much :) Would highly appreciate this as after countless searches on Google, as well as reading my textbook and watching Edrolo, I still can't quite grasp the whole concept of the cycling of coenzymes :/
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Re: VCE Biology Question Thread
« Reply #9926 on: March 10, 2018, 08:20:10 pm »
+1
It just means that coenzymes are recycled.

For example ATP has a phosphate broken off and becomes ADP. The breaking off of the phosphate releases energy which is used in a reaction.

The ADP then has another phosphate molecule reattached (during cellular respiration) so that it can be broken off to supply energy again, and so on.

NADH and NADPH have a hydrogen broken off, so they become NAD+ and NADP+ They can then have another hydrogen reattached and the cycle repeats.
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Sine

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Re: VCE Biology Question Thread
« Reply #9927 on: March 10, 2018, 10:56:55 pm »
+3
NADH/NADPH are not only hydrogen carriers but also electron carriers which is arguably the important aspect of that coenzyme. Also with ATP the third phosphate bond has the most energy so breaking that will give you energy but breaking the ADP bond to get AMP won't give you as much.

peachxmh

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Re: VCE Biology Question Thread
« Reply #9928 on: March 11, 2018, 06:09:51 am »
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Thanks for the replies guys! I just have one more question to raise - with the 'moving protons' part the study design talks apart, do NADH/NADPH also carry protons or is there another coenzyme that does that?
« Last Edit: March 11, 2018, 06:19:37 am by peachxmh »
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Re: VCE Biology Question Thread
« Reply #9929 on: March 11, 2018, 11:23:47 am »
+4
Thanks for the replies guys! I just have one more question to raise - with the 'moving protons' part the study design talks apart, do NADH/NADPH also carry protons or is there another coenzyme that does that?

Proton=hydrogen

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