Energy transfers official content common mistakes

Photosynthesis common mistake 1

Giving a vague answer instead of directly addressing: Describe the light-dependent reaction including chlorophyll photoionisation, electron transfer, ATP production, reduced NADP and photolysis..

Answer by clearly explaining how to describe the light-dependent reaction including chlorophyll photoionisation, electron transfer, ATP production, reduced NADP and photolysis..

Photosynthesis common mistake 1

Giving a vague answer instead of directly addressing: Describe the Calvin cycle using RuBP, GP, triose phosphate, ATP, reduced NADP and rubisco..

Answer by clearly explaining how to describe the Calvin cycle using RuBP, GP, triose phosphate, ATP, reduced NADP and rubisco..

Photosynthesis common mistake 1

Giving a vague answer instead of directly addressing: Identify environmental factors limiting photosynthesis..

Answer by clearly explaining how to identify environmental factors limiting photosynthesis..

Photosynthesis common mistake 1

Giving a vague answer instead of directly addressing: Evaluate data on agricultural practices used to overcome limiting factors..

Answer by clearly explaining how to evaluate data on agricultural practices used to overcome limiting factors..

Photosynthesis common mistake 1

Giving a vague answer instead of directly addressing: Required practicals 7 and 8: investigate leaf pigments by chromatography and dehydrogenase activity in chloroplast extracts..

Answer by clearly explaining how to required practicals 7 and 8: investigate leaf pigments by chromatography and dehydrogenase activity in chloroplast extracts..

energy transfers practical reasoning mistake

Describing Required practical 7: use chromatography to investigate pigments isolated from leaves without naming variables, controls or evaluation of the evidence.

For practical reasoning, state the method, independent variable, dependent variable and one controlled variable; keep the control constant; then evaluate validity, reliability, accuracy, precision, uncertainty, risk and possible improvements. Then link the practical evidence to Required practical 7: use chromatography to investigate pigments isolated from leaves.

energy transfers practical reasoning mistake

Describing Required practical 8: investigate dehydrogenase activity in chloroplast extracts without naming variables, controls or evaluation of the evidence.

For practical reasoning, state the method, independent variable, dependent variable and one controlled variable; keep the control constant; then evaluate validity, reliability, accuracy, precision, uncertainty, risk and possible improvements. Then link the practical evidence to Required practical 8: investigate dehydrogenase activity in chloroplast extracts.

Respiration common mistake 1

Giving a vague answer instead of directly addressing: Describe glycolysis, the link reaction and the Krebs cycle in respiration..

Answer by clearly explaining how to describe glycolysis, the link reaction and the Krebs cycle in respiration..

Respiration common mistake 1

Giving a vague answer instead of directly addressing: Explain oxidative phosphorylation using electron transfer, proton gradients and ATP synthase..

Answer by clearly explaining how to explain oxidative phosphorylation using electron transfer, proton gradients and ATP synthase..

Respiration common mistake 1

Giving a vague answer instead of directly addressing: Explain roles of NAD and FAD in respiration..

Answer by clearly explaining how to explain roles of NAD and FAD in respiration..

Respiration common mistake 1

Giving a vague answer instead of directly addressing: Compare aerobic respiration with anaerobic respiration in mammals and yeast..

Answer by clearly explaining how to compare aerobic respiration with anaerobic respiration in mammals and yeast..

energy transfers practical reasoning mistake

Describing Required practical 9: investigate the effect of a named variable on respiration rate in cultures of single-celled organisms without naming variables, controls or evaluation of the evidence.

For practical reasoning, state the method, independent variable, dependent variable and one controlled variable; keep the control constant; then evaluate validity, reliability, accuracy, precision, uncertainty, risk and possible improvements. Then link the practical evidence to Required practical 9: investigate the effect of a named variable on respiration rate in cultures of single-celled organisms.

Energy and ecosystems common mistake 1

Giving a vague answer instead of directly addressing: Explain biomass transfer through food chains and food webs..

Answer by clearly explaining how to explain biomass transfer through food chains and food webs..

Energy and ecosystems common mistake 1

Giving a vague answer instead of directly addressing: Calculate gross production, net production and respiratory loss where data are provided..

Answer by clearly explaining how to calculate gross production, net production and respiratory loss where data are provided..

Energy and ecosystems common mistake 1

Giving a vague answer instead of directly addressing: Explain why energy transfer between trophic levels is inefficient..

Answer by clearly explaining how to explain why energy transfer between trophic levels is inefficient..

Energy and ecosystems common mistake 1

Giving a vague answer instead of directly addressing: Evaluate ways to increase productivity in agricultural systems..

Answer by clearly explaining how to evaluate ways to increase productivity in agricultural systems..

Nutrient cycles common mistake 1

Giving a vague answer instead of directly addressing: Explain decomposition by saprobionts and nutrient release..

Answer by clearly explaining how to explain decomposition by saprobionts and nutrient release..

Nutrient cycles common mistake 1

Giving a vague answer instead of directly addressing: Describe nitrogen-cycle processes including ammonification, nitrification, nitrogen fixation and denitrification..

Answer by clearly explaining how to describe nitrogen-cycle processes including ammonification, nitrification, nitrogen fixation and denitrification..

Nutrient cycles common mistake 1

Giving a vague answer instead of directly addressing: Describe phosphorus cycling through rocks, soil, organisms and decomposers..

Answer by clearly explaining how to describe phosphorus cycling through rocks, soil, organisms and decomposers..

Nutrient cycles common mistake 1

Giving a vague answer instead of directly addressing: Explain effects of environmental conditions on decomposition and nutrient cycling..

Answer by clearly explaining how to explain effects of environmental conditions on decomposition and nutrient cycling..