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AQA A level Biology 2022 Past Paper 1 ACTUAL QUESTIONS AND CORRECT ANSWERS 100% GRADE A+
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AQA A level Biology 2022 Past Paper 1 ACTUAL QUESTIONS AND CORRECT ANSWERS 100% GRADE A+
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AQA A level Biology 2022 Past Paper 1Study online at https://quizlet.com/_g1ytop
1. 1) Describe the structure and function of the Structure:
nucleus 1) Nuclear envelope and
pores
2) Chromosomes/chro-
matin
3)Nucleolus
Function: (2 max)
1) Stores genetic informa-
tion/material for polypep-
tides (production)
2) DNA replication
3) Production of
mRNA/tRNA OR Tran-
scription occurs
4) Production of rRNA/ri-
bosomes
2. 1.2) Name the main polymer that forms the fol- Plant cell wall : cellulose
lowing cell walls Fungal cell wall: Chiten
3. 1.3) Suggest one reason the scientists used individual organisms
biomass instead of the number of individuals could not be separat-
of each plant species when collecting data to ed/identified
measure diversity OR
too time-consuming
OR
too small/numerous to
count individuals
4. 1.4) 0.7-0.71
5. 2.1) C difficile is a bacterial species that causes 1) Some bacteria have al-
disease in humans leles for resistance (due
Antibiotic resistant strains of C. diffcile have to mutation))
become a common cause of infection acquired 2) (exposure to) antibi-
when in hospital otics is the selection pres-
Explain how the use of antibiotics has led to sure
antibiotic- resistant strains OR
, AQA A level Biology 2022 Past Paper 1
Study online at https://quizlet.com/_g1ytop
Non resistant bacteria die
OR
resistant bacteria sur-
vive/reproduce
3) more antibiotics used
in hospital (compared
with elsewhere)
OR
Patients have weakened
immune system
6. 2.2) Name another disaccharide formed from maltose
two glucose molecules
7. 2.3) Scientists investigeted the effect of tre- 1) Wash hands with soap/
halose on the growth rate of C. difficile. They disinfect surfaces
grew populations of non-resistantand antibiot- 2) use sterile pipette/sy-
ic resistant C. difficle on separate agar plates ringe
with: 3 (remove bottle lid and)
-No carbohydrate added flame neck of bottle
- Trehalose added 4) remove the lid of (agar)
They measured the growth rate of the C. dificle plate at an angle
5) place pipette/spreader
Describe how the scientists could use aseptic into disinfectant (immedi-
techniqies to transfer 0.3cm&3 of C-diffucule in ately after use)
liquid culture from a bottle on to an agar plate 6) Use sterile spreader/in-
oculating loo
7) Work close to upward
air movement (convection
current)
8. 2.4) Use figure 2 to evaluate whether more tre- For
halose in the diet could be a factor in the in- 1) Resistant bacteria
creased number of antibiotic resistant C. diffi- grow faster with trehalose
cile infections 2) So resistant bacteria
(likely to) increase in fre-
quency in the popula-
tion/people
3) Resistant bacteria
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