anonasian
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#1
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#1
Add any answers you remember please.
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BioChemDave
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#2
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#2
Mitosis stage: metaphase
Serial dilution : 6 x 10^7
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pringles321
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#3
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what i put for the mutiple choice DONT THINK THEY RIGHT
A,d,b,b,,b,b,c,b,a,a,d,d,b,b,c,b
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pringles321
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#4
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#4
for plant 6 maker - selctive clone gentically identical susptible to same dieases / each can cause them to be wide out so need orgnial plant to breddign again. increase gentic variation and biodervisty , gene pool .allow for natural selection which does not occur in selective breeding as all the same so impossible
differnce between the stupid anaimal :big ears
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Blessing1
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#5
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#5
What microscope was used?
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Emi_x
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#6
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#6
Differences between the G nucleotide and ATP:

-ATP has three phosphates & the nucleotide only has one
-ATP contains the base Adenine & the nucleotide contains the base Guanine
-ATP contains a ribose sugar & the nucleotide contains a deoxyribose sugar
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Invective
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#7
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#7
Bacteria 6 marker (brief overview)

30 degree got to stable phase (peak growth) faster/exponential phase was shorter/faster than 20 degree sample (it took less hours)
Reason - High temperature so increased enzyme action, nutrients used faster

30 degree sample begun death phase faster than 20 degree
Reason - 30 degree sample used up nutrients faster, not enough to support growth.
Possible additional reason - 30 sample/Flask 2 had greater amount of bacteria, greater amount of waste products halting further growth/pH of broth too high killing bacteria faster than they can divide

I wrote more but I can't remember, idk but I doubt they'll get any marks.

Wild type variant 6 marker (very brief overview) - I took this question to be a maintaining biodiversity question in disguise

Can't remember the Q but I recall speaking about mono-culture being exposed to a pathogen all being inbred have similar resistance to pathogens, if one is affected, they're all affected.
Spoke on halted genetic drift, low genetic diversity, natural selection halted, evolution doesn't occur due to human interaction
(due to the first point) Loss of economical profits for countries that rely on such cash crops, social factors such as enjoying aesthetics, ecological reasons such as modified plants having competitive advantage and possibly having genes capable of eliminating competition and possibly harming organisms that feed on them due to toxins produced.

I waffled a lot but idk what the mark scheme could've said. This was the hardest question in the exam imo due to how vague the question seemed to me at least.
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Invective
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#8
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(Original post by Blessing1)
What microscope was used?
Light, TEM or SEM couldn't have been used, resolution was too bad and magnification was only x1000
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Robbie7
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#9
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#9
(Original post by Blessing1)
What microscope was used?
Light microscope.
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pm444
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#10
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#10
(Original post by BioChemDave)
Mitosis stage: metaphase
Serial dilution : 6 x 10^7
I got 6 times 10^5
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Zx12r1
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#11
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#11
(Original post by pm444)
I got 6 times 10^5
same
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luke.sanders
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#12
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(Original post by pm444)
I got 6 times 10^5
(Original post by Zx12r1)
same
you may have missed the final line that said 0.1cmcubed was taken from each tube
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pm444
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#13
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(Original post by luke.sanders)
you may have missed the final line that said 0.1cmcubed was taken from each tube
No. It said in the 0.1cm cubed taken from each tube. So I don't we had to include it.
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SplendidHoney
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#14
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#14
(Original post by BioChemDave)
Mitosis stage: metaphase
Serial dilution : 6 x 10^7
i got this too
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SplendidHoney
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#15
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#15
i got 2.24x10^-5 for the volume of the sphere
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SNOOPBLONG
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#16
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#16
(Original post by pringles321)
what i put for the mutiple choice DONT THINK THEY RIGHT
A,d,b,b,,b,b,c,b,a,a,d,d,b,b,c,b
I got
A,D,D,A,D,D,B,B,A,B,A,C,B,D,B
(btw i did no revision so dont judge me guys lol)
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pm444
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#17
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#17
(Original post by SplendidHoney)
i got 2.24x10^-5 for the volume of the sphere
me 2
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karthijay
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#18
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#18
any topic prediction for unified paper?
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livvymxo
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#19
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#19
(Original post by Robbie7)
Light microscope.
i put laser due to staining but i’m not sure if that’s right
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K.Nug
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#20
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#20
(Original post by SNOOPBLONG)
I got
A,D,D,A,D,D,B,B,A,B,A,C,B,D,B
(btw i did no revision so dont judge me guys lol)
I think I got : AADBCDBABCBDDCC but I'm 100% sure majority are wrong and Im not sure if those were my answers exactly
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