(AQA) A level Biology
paper 2: 2022
, In the following passage the numbered spaces can be filled with biological terms.
During photosynthesis, plants produce-(1)-compounds which contain carbon, such as
carbohydrates, lipids and proteins. Most of the sugars synthesised by plants are used
by the plant in-(2)-. The rest are used to make other groups of biological molecules.
These biological molecules form the biomass of the plants. Biomass can be measured
in terms of mass of-(3)-per given area per given time. The chemical energy store in dry
biomass can be estimated using-(4)-.
Write the correct biological term beside each number below, that matches the space in
the passage - CORRECT ANSWERS-1.Organic 2.Respiration 3.Carbon 4.Calorimetry
Describe light dependent reaction of photosynthesis. - CORRECT ANSWERS-1.
Carbon dioxide combines/reacts with ribulose bisphosphate/RuBP2. Produces two
glycerate (3- )phosphate/GP using (enzyme) Rubisco
3. GP reduced to triose phosphate; 4. Using reduced NADP
5. Using energy from ATP
6. Triose phosphate converted to glucose
Put a tick ( ) in the box next to the equation that shows how the net production of
consumers, N, can be calculated where I represents the chemical energy store in
ingested food F represents the chemical energy lost to the environment in faeces and
urine R represents the respiratory losses to the environment. - CORRECT ANSWERS-
N = I - (F + R)
In December 2017, the female breeding herd was 48% of all female cattle in the UK.
Use Table 1 to calculate the percentage of all female cattle that were beef cows in the
UK in December 2017. - CORRECT ANSWERS-21.6
Use Table 1 to calculate the increase in the number of dairy cows in the UK female
breeding herd between December 2013 and December 2017. - CORRECT ANSWERS-
88500
Farming cattle for humans to eat is less efficient than farming crops because of energy
transfer. Explain why. - CORRECT ANSWERS-1. Energy lost between/at
trophic/feeding levels
2. Energy lost via respiration/excretion/faeces;
Apart from temperature and pH, give two variables the scientist would have controlled
when preparing the liquid medium cultures. - CORRECT ANSWERS-1. Volume of
(stock) bacteria (culture)
2. Concentration of (stock) bacteria
A student concluded that this investigation showed that ammonia inhibits nitrogenase
activity in nitrogen-fixing bacteria. Use all the information to evaluate the student's
conclusion. - CORRECT ANSWERS-1. Nitrogenase activity decreases with increase in
ammonium chloride (concentration)
2. Nitrogenase activity zero with high (concentration of) ammonium chloride
paper 2: 2022
, In the following passage the numbered spaces can be filled with biological terms.
During photosynthesis, plants produce-(1)-compounds which contain carbon, such as
carbohydrates, lipids and proteins. Most of the sugars synthesised by plants are used
by the plant in-(2)-. The rest are used to make other groups of biological molecules.
These biological molecules form the biomass of the plants. Biomass can be measured
in terms of mass of-(3)-per given area per given time. The chemical energy store in dry
biomass can be estimated using-(4)-.
Write the correct biological term beside each number below, that matches the space in
the passage - CORRECT ANSWERS-1.Organic 2.Respiration 3.Carbon 4.Calorimetry
Describe light dependent reaction of photosynthesis. - CORRECT ANSWERS-1.
Carbon dioxide combines/reacts with ribulose bisphosphate/RuBP2. Produces two
glycerate (3- )phosphate/GP using (enzyme) Rubisco
3. GP reduced to triose phosphate; 4. Using reduced NADP
5. Using energy from ATP
6. Triose phosphate converted to glucose
Put a tick ( ) in the box next to the equation that shows how the net production of
consumers, N, can be calculated where I represents the chemical energy store in
ingested food F represents the chemical energy lost to the environment in faeces and
urine R represents the respiratory losses to the environment. - CORRECT ANSWERS-
N = I - (F + R)
In December 2017, the female breeding herd was 48% of all female cattle in the UK.
Use Table 1 to calculate the percentage of all female cattle that were beef cows in the
UK in December 2017. - CORRECT ANSWERS-21.6
Use Table 1 to calculate the increase in the number of dairy cows in the UK female
breeding herd between December 2013 and December 2017. - CORRECT ANSWERS-
88500
Farming cattle for humans to eat is less efficient than farming crops because of energy
transfer. Explain why. - CORRECT ANSWERS-1. Energy lost between/at
trophic/feeding levels
2. Energy lost via respiration/excretion/faeces;
Apart from temperature and pH, give two variables the scientist would have controlled
when preparing the liquid medium cultures. - CORRECT ANSWERS-1. Volume of
(stock) bacteria (culture)
2. Concentration of (stock) bacteria
A student concluded that this investigation showed that ammonia inhibits nitrogenase
activity in nitrogen-fixing bacteria. Use all the information to evaluate the student's
conclusion. - CORRECT ANSWERS-1. Nitrogenase activity decreases with increase in
ammonium chloride (concentration)
2. Nitrogenase activity zero with high (concentration of) ammonium chloride
