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Edexcel Biology B A-level

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Reply 60

thefailurelife

For the glycosidic bond did you have to invert it?

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Reply 61

Gerry-Atricks

Lmao that venn diagram harder than s1

Reply 62

si1239293

Original post by glad-he-ate-her

Lmao that venn diagram harder than s1

so true

Reply 63

Gerry-Atricks

Original post by teenhorrorstory

Yeah the question before that was substitution, but the Q after mentioned another mutation of a different gene

So multiple answers then, depending on chosen mutation?

Reply 64

thefailurelife

Omg i agreee aha

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Reply 65

teenhorrorstory

What did you guys get for the Q about the photons of light and the following Q about why it's an underestimate? My answer was a madness lmao.

Also the Q about the build up of lactae and proteins?

Reply 66

Gerry-Atricks

Original post by thefailurelife

For the glycosidic bond did you have to invert it?

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Oxygen was on top
2 hydrogens were below

drew structure of water next to it too

Reply 67

AidenJK

For the protein shortening one, I said the the substitution caused a codon coding for an amino acid to code for a stop signal, which meant the protein only formed up to that point

Reply 68

Gerry-Atricks

Original post by teenhorrorstory

What did you guys get for the Q about the photons of light and the following Q about why it's an underestimate? My answer was a madness lmao.

Also the Q about the build up of lactae and proteins?

Most light passing through plant not absorbed, wrong wavelength, wrong angle etc, so more needed to fix all carbon
number was 1 time 10 to the 11

lactate question i answered earlier, check last page

Reply 69

Gerry-Atricks

Original post by AidenJK

For the protein shortening one, I said the the substitution caused a codon coding for an amino acid to code for a stop signal, which meant the protein only formed up to that point

makes sense as well
i think there were quite a few right answers there

Reply 70

AidenJK

Original post by teenhorrorstory

What did you guys get for the Q about the photons of light and the following Q about why it's an underestimate? My answer was a madness lmao.

Also the Q about the build up of lactae and proteins?

I said that it was because lots of the carbon fixed would be released in respiration as CO2

Reply 71

Gerry-Atricks

others get 88.96% for venn?

Reply 72

Nitrogen09

Original post by Jkoo22

**** looks like I'm going to have to retake next year, goodbye undergrad medicine route

Same.

Reply 73

teenhorrorstory

Original post by glad-he-ate-her

others get 88.96% for venn?

Yeah

Reply 74

Jkoo22

Original post by glad-he-ate-her

others get 88.96% for venn?

I got 79%

Reply 75

Gerry-Atricks

Original post by AidenJK

I said that it was because lots of the carbon fixed would be released in respiration as CO2

So doesnt mean that those amount of photons wont fix that amount of carbon, it must be because some light is wrong wavelength, wrong angle etc so not absorbed and not used to fix

Reply 76

Gerry-Atricks

Original post by Jkoo22

I got 79%

I thin 88.96 was right
the total was 12500ish
the sum was like 196+892+9848+189 ish
im rounding here but it was near 90% overlap and it made sense with the diagram too

Reply 77

AidenJK

The 1-6 glycosidic bond thing with the MGDG and DGDG were horrible, I started off drawing the bond coming from carbon 4 (because they didnt draw in the OH and H groups, sneaky af) but then realised that the carbon 6, coming off the top had been left without any bonds drawn either, so I drew the C-O-C bond from there

Reply 78

Susi3b

Original post by Nitrogen09

Same.

Me three im speechless that was terrrrrrible

Reply 79

AidenJK

Original post by glad-he-ate-her

So doesnt mean that those amount of photons wont fix that amount of carbon, it must be because some light is wrong wavelength, wrong angle etc so not absorbed and not used to fix

But it said in the question that it was based on the amount of carbon actually in the bacteria, not the total amount that was fixed. So some of the carbon being lost in respiration is still carbon that would've been fixed but not be inside the bacteria.