A-Level Biology Edexcel B 9BI0

PAG: Practical Endorsement

#PAG.1

Investigate a factor affecting the initial rate of an enzyme controlled reaction.

#PAG.10

Investigate the effects of different wavelengths of light on the rate of photosynthesis.

#PAG.11

Investigate the presence of different chloroplast pigments using chromatography.

#PAG.12

Investigate the rate of growth of bacteria in liquid culture.

#PAG.13

Isolate individual species from a mixed culture of bacteria using streak plating.

#PAG.14

Investigate the effect of gibberellin on the production of amylase in germinating cereals using a starch agar assay.

#PAG.15

Investigate the effect of different sampling methods on estimates of the size of a population.

#PAG.16

Investigate the effect of one abiotic factor on the distribution or morphology of one species.

#PAG.2

Use of the light microscope, including simple stage and eyepiece micrometers and drawing small numbers of cells from a specialised tissue.

#PAG.3

Make a temporary squash preparation of a root tip to show stages of mitosis in the meristem under the light microscope.

#PAG.4

Investigate the effect of sucrose concentrations on pollen tube growth.

#PAG.5

Investigate the effect of temperature on beetroot membrane permeability.

#PAG.6

Determine the water potential of plant cells.

Water potential = turgor pressure + osmotic potential

ψ=P+πψ = P + π

#PAG.7

Dissect an insect to show the structure of the gas exchange system.

#PAG.8

Investigate factors affecting water uptake by plant shoots using a potometer.

#PAG.9

Investigate factors affecting the rate of respiration using a respirometer.

10.4
Human effects on ecosystems