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OCR Biology F212 Revision [3rd June 2013] (Now Closed)

Was ethanol DEG question, inhibiting?

Nope. They can both be broken down my the enzyme, if you read the text book, you'd know ethanol was the natural substrate for alcohol dehydrogenase.

Reply 1781

own

Original post by theworld

Was ethanol DEG question, inhibiting?

Part ii, yes

Reply 1782

jackitsme

Original post by Gotzz

I put cystine instead of glycine too!!!! :mad:

wait x was cytosine!

Reply 1783

wndms

1

Original post by jackitsme

i think microscopes is an answer

But microscope stuffs are in unit1.. evolution makes more sense to be in a unit2 exam isn't it?

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Reply 1784

Deziah

15

I put poor diet, overcrowding and homelessness for the three reasons why people are more at risk for TB. I'm really started to doubt homelessness but my teacher told me that. D:

Reply 1785

Liamnut

13

Original post by niceguy95

7 marks or not

For the selective breeding question

I wrote about how it follows natural selection
Best crops with best characteristics chosen and bred together until Hugh yielding crop.
Resistance to diseases due mutation and genetic variation
Crops with the resistance can on,y survive and reproduce
Offspring are advantageous
Alleles which cause this resistance passed over many generation
Evolution occurs (long term) so crops with the resistance becomes more common I the population

trouble is, that's not selextive breeding.

Reply 1786

Musclemania

1

Am I the only one who said that the phagocyte has elastase enzymes which are used to digest elastic fibres so they can exit the blood into the tissue fluid? That was all I could think of at the time. So much pressure!

Reply 1787

Liberty.

10

Original post by Gotzz

I put cystine instead of glycine too!!!! :mad:

I was so proud of myself for remembering a name of an amino acid aswell! :unimpressed:

Reply 1788

Liamnut

13

Original post by Deziah

I put poor diet, overcrowding and homelessness for the three reasons why people are more at risk for TB. I'm really started to doubt homelessness but my teacher told me that. D:

You would get marks for homelessness, seriously, don't worry.

Reply 1789

niceguy95

14

Original post by own

Natural selection isn't the same as selective breeding?

I know it's doesn't, It asked about resistance to disease and that due natural selection

Reply 1790

Liamnut

13

Original post by Musclemania

Am I the only one who said that the phagocyte has elastase enzymes which are used to digest elastic fibres so they can exit the blood into the tissue fluid? That was all I could think of at the time. So much pressure!

Don't worry, it's only two marks.

Reply 1791

Liamnut

13

Original post by niceguy95

I know it's doesn't, It asked about resistance to disease and that due natural selection

No, it asked how selective breeding could be used to produce resistant crops.

Reply 1792

jackitsme

Original post by Musclemania

Am I the only one who said that the phagocyte has elastase enzymes which are used to digest elastic fibres so they can exit the blood into the tissue fluid? That was all I could think of at the time. So much pressure!

Thats for reaching inner edothelium,sorry

Reply 1793

own

Original post by niceguy95

I know it's doesn't, It asked about resistance to disease and that due natural selection

They specifically said selective breeding

Reply 1794

niceguy95

14

Original post by Liamnut

trouble is, that's not selextive breeding.

I didn't ask for, it asked long and short term reasons why they are resistant to disease, I on,y mentioned selective breeding process, the rest is explanation of natural selection which are Guidlines for resistance