AQA GCSE Biology B1 - the unofficial markscheme Watch

pu55yd3stroyer
Badges: 0
Rep:
?
#1
Report Thread starter 3 years ago
#1
The unofficial markscheme for 16th May 2017 AQA Biology Unit 1 GCSE paper is here

Anyone got any clue on what the marks were actually for in any of those questions?
0
reply
MarkScheme69
Badges: 4
Rep:
?
#2
Report 3 years ago
#2
The percentage question was 99.3%
0
reply
alyxgower
Badges: 2
Rep:
?
#3
Report 3 years ago
#3
The paper was so unlike any other b1. The menstrual cycle didn't come up which was so annoying. I know this isn't related but, what did you put for an independent company?
0
reply
R8123
Badges: 10
Rep:
?
#4
Report 3 years ago
#4
whaat howw??
0
reply
R8123
Badges: 10
Rep:
?
#5
Report 3 years ago
#5
(Original post by alyxgower)
The paper was so unlike any other b1. The menstrual cycle didn't come up which was so annoying. I know this isn't related but, what did you put for an independent company?
its something like a company that has nothing to do with the drug company
0
reply
jondoeyamomma
Badges: 0
Rep:
?
#6
Report 3 years ago
#6
(Original post by alyxgower)
The paper was so unlike any other b1. The menstrual cycle didn't come up which was so annoying. I know this isn't related but, what did you put for an independent company?
i wrote a company that isnt associated with the drug company
0
reply
MarkScheme69
Badges: 4
Rep:
?
#7
Report 3 years ago
#7
An independent business is a business that is free from outside control.
0
reply
Akitteringham
Badges: 0
Rep:
?
#8
Report 3 years ago
#8
(Original post by MarkScheme69)
The percentage question was 99.3%
Your joking right? You don't actually think that surely?
0
reply
R8123
Badges: 10
Rep:
?
#9
Report 3 years ago
#9
(Original post by Akitteringham)
Your joking right? You don't actually think that surely?
i had 0.6 for one and the other was 1.6???
0
reply
alyxgower
Badges: 2
Rep:
?
#10
Report 3 years ago
#10
Okay that's alright. I put a company that's not associated with any other companies. Hardly a b1 question though.
At least the 6 marker was nice.
0
reply
krag
Badges: 0
Rep:
?
#11
Report 3 years ago
#11
what do you think an A* would be out of 60??
0
reply
alyxgower
Badges: 2
Rep:
?
#12
Report 3 years ago
#12
I had 60% as it was 0.6 so I made it a percentage? But putting that as a question was a bit mean to be fair.
Also the mosquito article question about the article being not correct was stupid! Worst paper I've seen
0
reply
R8123
Badges: 10
Rep:
?
#13
Report 3 years ago
#13
unofficial mark scheme
http://www.thestudentroom.co.uk/show....php?t=4091295
0
reply
AmiMcGivney
Badges: 0
Rep:
?
#14
Report 3 years ago
#14
I got 6% oh well😂
0
reply
AmiMcGivney
Badges: 0
Rep:
?
#15
Report 3 years ago
#15
(Original post by alyxgower)
I had 60% as it was 0.6 so I made it a percentage? But putting that as a question was a bit mean to be fair.
Also the mosquito article question about the article being not correct was stupid! Worst paper I've seen
i put 6% so hopefully we were along the right lines! X
0
reply
KoDang
Badges: 4
Rep:
?
#16
Report 3 years ago
#16
(Original post by krag)
what do you think an A* would be out of 60??
51/52. It was too easy for anything high
0
reply
AmiMcGivney
Badges: 0
Rep:
?
#17
Report 3 years ago
#17
Dont know how to use this app but if you could somehow forward this on to someone else. Heres what i have found, mark scheme wise. If this is correct i should bave 46 ish out of 60, does anyone know what grade that would be? X
1. Llegal, recreation (1)

2. Changes chemical reactions, causes withdrawal symptoms (1)

3. Independent company - not associated with the drug company (1)

4. Unbiased (1)

5. Effects nicotine, which is the same area as alcohol in the brain. Reduces pleasure, more likely to drink less (2)

6. Boys drink beer, cider but the girls drank more wine, alcopop and spirits. (2)

7. Not all boys drink because...(2)

8. Carbohydrates --> Energy, Protein --> Growth + repair, Fat --> Warmth + energy, Fibre --> helps digestive system, Calcium --> strong bones and teeth, Water --> Hydrated the body (6)

9. Temperature sensor - more accurate/easier to read because digital (1)

10. It increased because micro organisms break down grass, respire and release CO2 This is trapped because of cotton wool so it accumulates and increases (2)

11. It levels off at 20% because either not oxygen left for microorganisms to respire or all of the grass has been decomposed so the microorganisms have nothing left to feed on to respire (not sure) (1)

12. Receptor (e.g eyes/tongue/nose/skin/ears) detect stimuli and pass on an impulse. Effectors (e.g muscles/glands) receive an impulse and respond by contracting/releasing hormones (4)

13. Synapse - junction/small gap between two nerve endings/neurone (2)

14. Neurotransmitters diffuse through the synapse, attach onto nerve ending and continues pulse (2)

15. Sense organ using spinal chord - skin (1)

16. Mean speed = 80/50 = 1.6 (2)

17. Why is brain (without relay neurones) faster than spine? Less time wasted for impulses to be passed through the relay so it travels faster than the spine because of a shorter distance (2)

18. Biomass is lost through waste/energy/heat/respiration/movement (2)

19. There is a large amount of snails (200) as opposed to thrush (2) meaning they have less competition and ate more snails this more biomass (2)

20. It is a scatter graph because it is comparing two sets of data (1)

21. Higher percentage of no striped snails in woodlands but low percentage in grassland. Whereas with the light coloured snails, there's a higher percentage in grassland and low percentage in woodlands. (2)

22. Woodland snails are better adapted because they are camouflaged (1)

23. Horses foot size increased, amount of foot touching the floor decreased (2)

24. Foot has a larger surface area so less pressure on soft mud so they don't sink into the ground (2)

25. Variation in genes/mutations, better characteristics allow it to survive better and breed so their genetic material are passed onto the next generations. (4)

26. Advantages 1. Males are released, they don't feed of blood so they don't cause malaria. 2. They reproduce so the children die before they become female adults and reduce malaria outbreak

27. Disadvantages 1. Millions are released which could disrupt food chain, may even reduce biodiversity. 2. There could be long term side effects

28. Overall they should/shouldn't release the mosquitos because... (4)

29. Cut the gene using an enzyme from the DNA of the bacteria. Cut the DNA, using an enzyme, of the mosquito and insert the gene into it. Put the cell back into... (3)

30. First part of the food chain are producers i.e plants (2)

31. Mayfly larvae (animal) - water pollution (1) 32. Oxygen meter/rat tailed maggots/sludge worms for water pollution (1) 60 marks
Posted from TSR Mobile
0
reply
MarkScheme69
Badges: 4
Rep:
?
#18
Report 3 years ago
#18
Official Mark scheme. All questions answered 1. Alcohol legal, recreation (1)a. Changes chemical reactions, causes withdrawal symptoms (1)b. Independent company - not associated with the drug company (1)c. Unbiased (1)2. Effects nicotine, which is the same area as alcohol in the brain. Reduces pleasure, more likely to drink less (2)a. Boys drink beer, cider but the girls drank more wine, alcopop and spirits. (2)b. Not all boys drink because.(2)3. Carbohydrates --> Energy, Protein --> Growth + repair, Fat --> Warmth + energy, Fibre --> helps digestive system, Calcium --> strong bones and teeth, Water --> hydrated the body (6)a. Temperature sensor - more accurate/easier to read because digital (1)b. Receptor (e.g eyes/tongue/nose/skin/ears) detect stimuli and pass on an impulse. Effectors (e.g muscles/glands) receive an impulse and respond by contracting/releasing hormones (4) ii. Synapse - junction/small gap between two nerve endings/neurone (2)iii. Neurotransmitters diffuse through the synapse, attach onto nerve ending and continues pulse (2)c. Sense organ using spinal chord - skin (1)ii. Mean speed = 80/50 = 1.6 (2)iii. Why is brain (without relay neurones) faster than spine? Less time wasted for impulses to be passed through the relay so it travels faster than the spine because of a shorter distance (2)
4. It increased because microorganisms break down grass, respire and release CO2 This is trapped because of cotton wool so it accumulates and increases (2)a. It levels off at 20% because either not oxygen left for microorganisms to respire or all of the grass has been decomposed so the microorganisms have nothing left to feed on to respire (not sure) (1)b. Biomass is lost through waste/energy/heat/respiration/movement (2)i. There is a large amount of snails (200) as opposed to thrush (2) meaning they have less competition and ate more snails this more biomass (2)ii. It is a scatter graph because it is comparing two sets of data (1)iii. Higher percentage of no striped snails in woodlands but low percentage in grassland. Whereas with the light coloured snails, there's a higher percentage in grassland and low percentage in woodlands. (2)c. Woodland snails are better adapted because they are camouflaged (1)5. Horses foot size increased, amount of foot touching the floor decreased (2)a. Foot has a larger surface area so less pressure on soft mud so they don't sink into the ground (2)ii. Variation in genes/mutations, better characteristics allow it to survive better and breed so their genetic material are passed onto the next generations. (4)6. Advantages 1. Males are released, they don't feed of blood so they don't cause malaria. 2. They reproduce so the children die before they become female adults and reduce malaria outbreak.Disadvantages 1. Millions are released which could disrupt food chain, may even reduce biodiversity. 2. There could be long term side effects Overall they should/shouldn't release the mosquitos because... (4)a. Many people died. so it was 99.3% (2)b. Cut the gene using an enzyme from the DNA of the bacteria. Cut the DNA, using an enzyme, of the mosquito and insert the gene into it. Put the cell back into... (3)7. First part of the food chain are producers i.e plants (2)a. Mayfly larvae (animal) - water pollution (1)ii. Oxygen meter/rat tailed maggots/sludge worms for water pollution (1)Some questions are missing but most of them are there.60 marks total
0
reply
MarkScheme69
Badges: 4
Rep:
?
#19
Report 3 years ago
#19
(Original post by Akitteringham)
Your joking right? You don't actually think that surely?
It was because most people died and the question asked for how many of the percentage of the population infected died. Rough idea of numbers

Infected 6 x 10**8
died 4 x 10 **7

A bit of math and you get 99 percent. 0.6 is way too low
0
reply
j3ss1cah
Badges: 0
Rep:
?
#20
Report 3 years ago
#20
(Original post by krag)
what do you think an A* would be out of 60??
Apparently due to how many people have complained etc. the grade boundaries are going to be similar to 2012 when this happened with AQA Biology and it was

A*: 39/60
A: 32/60
B: 25/60
C:19/60
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts

All the exam results help you need

2,003

people online now

225,530

students helped last year

University open days

  • University of Dundee
    Undergraduate Open Day Undergraduate
    Mon, 26 Aug '19
  • University of Aberdeen
    General Open Day Undergraduate
    Tue, 27 Aug '19
  • Norwich University of the Arts
    Postgraduate (MA) Open Day Postgraduate
    Sat, 31 Aug '19

How are you feeling about GCSE Results Day?

Hopeful (214)
12.49%
Excited (156)
9.1%
Worried (306)
17.85%
Terrified (381)
22.23%
Meh (169)
9.86%
Confused (37)
2.16%
Putting on a brave face (237)
13.83%
Impatient (214)
12.49%

Watched Threads

View All
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise