Biology Paper 1 Edexcel 2019

The more beads there were then the faster the rate because it breaks down faster

Original post by Snowwee

what was the beads one?

Reply 41

AuTalon

9

Original post by Amrinder27

Wtf are you on about they give you the deaths you just multiply it by 0.15%

0.15% die who get it and they gave you the deaths. I thought you had to find the total population that get measles?

Reply 42

Do you know the test for pH? It's similar to that but with the water baths instead of different pHs.

Original post by nicole123444xxx

can someone produce a mark scheme, what did you guys talk about for the 6 marker and what did you say about the optimum temp experiment

Reply 43

i think, or something along those lines cant remember the orginally number but it was that times 10 to get 1.5percent which was like 1,34millon or something , *10 to get 13.4 mill or something * 3 to get like 29. something mill and then divided by 3 to get 10 percent, then times answer by 10 to get 100 percent which was like 89.5 millon which in stan form is like 8.95*10 8 or something cant rember answer

Original post by Lella99x

What was the awnser for the 0.15% population one and how do you do it

Original post by AuTalon

Times the 0.15% by 10.
Makes it 15%
Divide 15% by 3
5% times 20 = 100%

I think

Reply 44

yeah ur right lmao its like 89 millon

Original post by AuTalon

0.15% die who get it and they gave you the deaths. I thought you had to find the total population that get measles?

Reply 45

Jbinning13

5

Original post by AxelB

Was that the magnification question where it gave you the micrograms to picograms as 1 to 1000?

it was 65,000

Reply 46

equigz

6

I put Y I think

Original post by kate_howard_1

erm starch was blue black and then NOT protein was blue.

Reply 47

but it asked you in ratio which was like 1:3 and i swear you have to talk about homozgous as well, also for the punnit sqaure did u get
B O
A AB A
O B O

Original post by the_icy_goldfish

25% for each and one was blood type AB as they are co-dominant also both parents had to be heterozygous because if their child was O and A and B are dominant over O then the child must have both O alleles. Also for filling out the square, the alleles must be written in i to the power of A and i to the power of B and so on. Also just add definitions of things like recessive and dominant etc.

Reply 48

but it was in ratio and i dont think you need to the power n all that

Original post by the_icy_goldfish

25% for each and one was blood type AB as they are co-dominant also both parents had to be heterozygous because if their child was O and A and B are dominant over O then the child must have both O alleles. Also for filling out the square, the alleles must be written in i to the power of A and i to the power of B and so on. Also just add definitions of things like recessive and dominant etc.

Reply 49

I think for the s to the power of -1 the answer was 0.21 or something because you had to divide the balls by the second and that was like 0.208 because it was grams second to the -1 which is the same as balls divided by seconds.

Also, what was the chlorophyll questions? I thought it was what plants release and that carbon dioxide, unless I'm thinking about the wrong questions XD

Original post by HuManPerSon1234

Multiple choice q
RNA polymerase
0.0083s-1
Oxygen and chlorophyll
Eukarya

Reply 50

Probably can be in ratio or percentage, and for blood type you to need the "to the power of" because thats how it is written for alleles of blood. Don't know why though but it says in the textbook

Original post by lilskeet69

but it was in ratio and i dont think you need to the power n all that

Reply 51

Original post by the_icy_goldfish

I think for the s to the power of -1 the answer was 0.21 or something because you had to divide the balls by the second and that was like 0.208 because it was grams second to the -1 which is the same as balls divided by seconds.

Also, what was the chlorophyll questions? I thought it was what plants release and that carbon dioxide, unless I'm thinking about the wrong questions XD

Plants take in co2 and realise oxygen

Reply 52

omg did it actually ask ratio? I thought it was probability! OOps. Also, yeah I talked about homozygous. And yeah I got that for my punnet square too.

Original post by lilskeet69

but it asked you in ratio which was like 1:3 and i swear you have to talk about homozgous as well, also for the punnit sqaure did u get
B O
A AB A
O B O

Reply 53

Original post by the_icy_goldfish

Probably can be in ratio or percentage, and for blood type you to need the "to the power of" because thats how it is written for alleles of blood. Don't know why though but it says in the textbook

Revision guide I don’t think it does but maybe ur right someone will make an official mark scheme I think the 6 markers were quite easy this year tho

Reply 54

Jbinning13

5

do you think grade boundaries are going to be high?

Reply 55

Jbinning13

5

Original post by the_icy_goldfish

25% for each and one was blood type AB as they are co-dominant also both parents had to be heterozygous because if their child was O and A and B are dominant over O then the child must have both O alleles. Also for filling out the square, the alleles must be written in i to the power of A and i to the power of B and so on. Also just add definitions of things like recessive and dominant etc.

yh I got the same =)

Reply 56

1) If you times it by 0.15 if will give you 15% which isnt right

2) The questions said that 0.15% cases resulted in deaths and there were around 300000 deaths? (cant remember tbh) meaning that 0.15%=300000

3) this means that you need to make 0.15 into 100 (%) and whatever you do, do the same to the 300000

4) so you need to divide 300000 by 15 then x10000 and thats the answer!

Original post by Amrinder27

Wtf are you on about they give you the deaths you just multiply it by 0.15%

Reply 57

Ikr I feel like the grade boundaries are going to completely shift or paper 2 is gonna be frickin hard

Original post by lilskeet69

Revision guide I don’t think it does but maybe ur right someone will make an official mark scheme I think the 6 markers were quite easy this year tho

Reply 58

You x100 to make it 15%
0.15 x 10 = 1.5

also you could have divided by 15 then x10000

Original post by AuTalon

Times the 0.15% by 10.
Makes it 15%
Divide 15% by 3
5% times 20 = 100%

I think

Reply 59