Unofficial Mark scheme: AQA GCSE Biology Paper 1 Triple Higher Tier 16th May 2023

lmao no revision needed for the mocks tmr, preciate the person who posted this

lmao no revision needed for the mocks tmr, preciate the person who posted this

I hope you get a different paper.

Unofficial Mark scheme: AQA GCSE Biology Paper 1 Triple Higher Tier 16th May 2023

Well done on completing the exam everyone!

This thread is to share your answers, I'll collate them later on today into this Original Post. Between us this should create an unofficial mark scheme, allowing people to get an idea of their performance in this exam.

Answers

Question 1:
1.1 What is a tissue?
Group of cells working together to perform a common function.
1.2 meristem tissue
1.3 Willow
1.4 1440 mg
1.5 Why did they use the berries?
Suggested answers - Berries could be extracted without hindering growth of the plant
-
-
-

Question 2:

Question 3:
3.1 Bacteria produce toxins that damage healthy cells
3.2 Vaccines and herd immunity question

Question 4: The heart
4.1 Where are the pacemaker cells located?
Right Atrium
4.2
4.3 Identify 2? (3?) Structural differences between arteries and veins
- Arteries have relatively smaller lumen whereas veins have relatively larger lumen
- Arteries have thicker elastic and muscular walls whereas veins have thinner elastic and muscular walls
4.4 Effect of a partly blocked coronary arteries on the body (6 marks)

Question 5:


Question 6: Leaf
1) 6.9
2) Why green light made the leaf disks float higher?
3) Why blue light made the.disks float sooner?
4) State one reason why the paper disc C wasn't dipped in any antibiotic?
To check if there are any unwanted substances on the paper discs that may affect the results
Why should Antibiotic B be used instead of Antibiotic A? (2 marks)
So they don't float to the top of the solution
5) Why was sodium hydrocarbonate solution used instead of water?
Carbon dioxide from the solution can be used. Ensures that CO2 is not the limiting factor/ CO2 is plentiful so more photosynthesis
6) Describe the results of blue and green light on the clorophyll with evidence from the two graphs. (4 marks)
One answer:
the wavelength of blue light was around 450. On the graph, this showed that around 82% of sunlight was absorbed. This means more photosynthesis and so more oxygen produced so less time is needed for the leaf discs to reach the surface.

Wavelength of green light was around 500~600. On the graph, it showed that only ~2% of sunlight was absorbed. This means less photosynthesis and so less oxygen produced so more time is needed for the leaf discs to reach the surface.

---

Questions which don't currently have positions or answers:

Describe 2 effects of Anaerobic respiration on the body? (4 marks?)
- Heavy breathing
- More frequent breathes
- Lactic acid in muscles

Describe an investigation on athletes during different types of exercises have different heart rates? (6 marks)
One answer:
Track athelete heart rate with heart monitor and fitness tracker. Instruct athelete to do running and cardio based exercises (swimming, jogging.) Record BPM for each exercise and ensure 3-4 minute rest recovery and rehydration. Also light intensity to prevent exhaustion. Then move onto another exercise type like weightlifting for high reps and light weight on different exercises like bench press, deadlift, squat. Measure Heart BPM and ensure rest and recovery. Then calculate mean BPM and compare the results with the cardio exercises


Why did antibiotic B not destroy salmonella bacteria anymore?
Bacteria mutated to become resistant to antibiotic B

Describe the effect of the vaccine on the chickens immune system and how it prevents epidemics in humans

How could the scientist decide which antibiotic was better for salmonella?
Measure the diameter.
Divide by 2 and multiply by pi for each antibiotic.
Compare.
Whichever is higher is better

Hi everyone,

I'm tagging in all users who have posted in the Paper 1 exam chat. This is the space if you want to work together and put together an unofficial markscheme. Please read above!

EH

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Unofficial Mark scheme: AQA GCSE Biology Paper 1 Triple Higher Tier 16th May 2023

Well done on completing the exam everyone!

This thread is to share your answers, I'll collate them later on today into this Original Post. Between us this should create an unofficial mark scheme, allowing people to get an idea of their performance in this exam.

Answers

Question 1:
1.1 What is a tissue?
Group of cells working together to perform a common function.
1.2 meristem tissue
1.3 Willow
1.4 1440 mg
1.5 Why did they use the berries?
Suggested answers - Berries could be extracted without hindering growth of the plant
-
-
-

Question 2:

Question 3:
3.1 Bacteria produce toxins that damage healthy cells
3.2 Vaccines and herd immunity question

Question 4: The heart
4.1 Where are the pacemaker cells located?
Right Atrium
4.2
4.3 Identify 2? (3?) Structural differences between arteries and veins
- Arteries have relatively smaller lumen whereas veins have relatively larger lumen
- Arteries have thicker elastic and muscular walls whereas veins have thinner elastic and muscular walls
4.4 Effect of a partly blocked coronary arteries on the body (6 marks)

Question 5:


Question 6: Leaf
1) 6.9
2) Why green light made the leaf disks float higher?
3) Why blue light made the.disks float sooner?
4) State one reason why the paper disc C wasn't dipped in any antibiotic?
To check if there are any unwanted substances on the paper discs that may affect the results
Why should Antibiotic B be used instead of Antibiotic A? (2 marks)
So they don't float to the top of the solution
5) Why was sodium hydrocarbonate solution used instead of water?
Carbon dioxide from the solution can be used. Ensures that CO2 is not the limiting factor/ CO2 is plentiful so more photosynthesis
6) Describe the results of blue and green light on the clorophyll with evidence from the two graphs. (4 marks)
One answer:
the wavelength of blue light was around 450. On the graph, this showed that around 82% of sunlight was absorbed. This means more photosynthesis and so more oxygen produced so less time is needed for the leaf discs to reach the surface.

Wavelength of green light was around 500~600. On the graph, it showed that only ~2% of sunlight was absorbed. This means less photosynthesis and so less oxygen produced so more time is needed for the leaf discs to reach the surface.

---

Questions which don't currently have positions or answers:

Describe 2 effects of Anaerobic respiration on the body? (4 marks?)
- Heavy breathing
- More frequent breathes
- Lactic acid in muscles

Describe an investigation on athletes during different types of exercises have different heart rates? (6 marks)
One answer:
Track athelete heart rate with heart monitor and fitness tracker. Instruct athelete to do running and cardio based exercises (swimming, jogging.) Record BPM for each exercise and ensure 3-4 minute rest recovery and rehydration. Also light intensity to prevent exhaustion. Then move onto another exercise type like weightlifting for high reps and light weight on different exercises like bench press, deadlift, squat. Measure Heart BPM and ensure rest and recovery. Then calculate mean BPM and compare the results with the cardio exercises


Why did antibiotic B not destroy salmonella bacteria anymore?
Bacteria mutated to become resistant to antibiotic B

Describe the effect of the vaccine on the chickens immune system and how it prevents epidemics in humans

How could the scientist decide which antibiotic was better for salmonella?
Measure the diameter.
Divide by 2 and multiply by pi for each antibiotic.
Compare.
Whichever is higher is better

hi guys how is your day going are the grade boundries hi. i love biology its so fun and i dont like chemistry.

1.4 = why do they use the berries

Asexual vs Sexual question:
Sexual is via Mitosis and Asexual is via Meiosis

"The test one" :
C
'The one with both of them blue'

Question 4: The heart
Where are the pacemaker cells located?
Right Atrium

Multiple choice:
A and C
A and D
B and C
(some confusion here, AC most common answers so far)

Design an experiment investigating the effect of different forms of exercise. (6 marks)

Questiom about a cow fighting a pathogen:
B lymphocytes engulf the cells once the antibodies deactivate the pathogen?

2 aseptic techniques to culture bacteria:
1. Sterilise all equipment used including the work bench
2 - pass through inoculating flame through a bensen burner
3 - wearing gloves

How could the scientist decide which antibiotic was better for salmonella?
Measure the diameter of the inhibition zone???

Final Question:
1) 6.9
2) Why green light made the leaf disks float higher?
3) Why blue light made the.disks float sooner?

i didnt lil bro, we up

So how will that help you in the summer? The point of mocks is to show where you need to improve - you've robbed yourself.

what about the two 6 markers ??? I don't think I said the right points ;(((((((((((

What were the 6 markers ? If u remember them

im joking but the only 6 marker I remember is on paper 2 abt Darwin like it was the last question abt evolution LEGIT EVERYTHING all in on question. it was soo hard

we haven't done evolution yet so I doubt it will come up but thanks for the reply tho <3

The 1st Question was: What is a tissue?

oh no - this is a cheats charter for 2023/4. Please can this thread be hidden after August 2023?

i think they change the wording of the questions in the y11 mocks. it will be the same paper but different data and numbers so it isn't cheatable

for question 1.5
i did 60% of 1.2 which gave me 0.72
which u then multiply by 2 (which is what i dont understand cuz why do we need to multiply by 2)
then u do 0.72 x 2 = 1.44
1.44 x 1000 = 1440
could someone plz explain why we need to multiply by 2