Which term describes the splitting of water molecules in the presence of lf dus8fx7 rg5*ight to produce electrons, hydrogen ions and oxyg dr87s5 uf*gfxen molecules?

  Which of the following is involved in carbon fixation during photi)09scq)4 n p96v - ic*2nranx;owzu gn.bnh bosynthesis?

  The diagram below shows an experiment investigating the effect of temperaturex5qu )e8u5ki x9r(clf on the rate of photosynthesis. Which of the following is not a method of keeping a controlled variable at a constant value throughout this particular experil ckue 5qxxur i89f5()ment?

  What does X representfv / lii5nxi-n ;;1pft?

  The Hill reaction shows electron transfer in iso5ow(w) dd fj:olated chloroplasts for the light-dependent reactionowj (o:f )dd5ws of photosynthesis. A blue dye, DCPIP (2,6-dichlorophenolindophenol) is used instead of the natural final electron acceptor. What is the final electron acceptor in photosynthesis?

  The micrograph below shows part of a chloroplast in a leaf.Whichb:ie-tr8,ysd: t7pf 2 bo*jgn of the following structures are found in the part of a chloroeb :gdjo :8t*pi7t y-2nsbr ,fplast labelled X?
I.Photosystem I
II.ATP Synthase
III.Ribosomes

  This graph shows the rate of photosyp t mklmv/-h58nthesis at different temperatures.

What conclusion can be made?

  The graph shows the effectg j6.pz,3e h mbiexu81 of light intensity on the rate of photosynthesis.

What can be concluded from the results presented in this graph?

  The following processes occur in the Calvin cycle. ocv 5439rpt9xmbxjl)c -0.n oyphu9 o
I. Ribulose bisphosphate regeneration
II. Carbon dioxide fixation
III. Glycerate-3-phosphate is reduced to triose phosphate
Which is the incorrect sequence for these processes?

  Which of the following correctlyx wxifksxzx 3grz1k-xi;1l0.fo1(-z shows where chemiosmosis takes place in photosyntx3 sz;fzlx1w1(xg1 ziik-oxr0f.k x -hesis and aerobic cell respiration?

Coleus blumei is an attrattxtw/h+gb6dex )(n+ ctive houseplant with red leaves.

1.Determine with a reason whether or not this plant is still able to conduct photosynthesis with red leaves.
2.Red leaves absorb and reflect different coloured light than green leaves. Distinguish between red light and green light in the visible spectrum.
3.Outline how limiting factors affect the rate of photosynthesis.
4.Explain how oxygen produced during photosynthesis can be used during respiration

  What is the main source of hydrogen ions in the light-d)1swh 4tvo3 d 5g1wm+op4 xijtependent reactions for photi15m j3to xvh o4gws4d1t)w+posynthesis?

  Which of the following correctly describe*/9 vqx; m+n xu,voy ,pjcdl-js photosynthesis or respiration?

	Reaction	Products	Anabolic or Catabolic	Endothermic or Exothermic
A	Photosynthesis	Carbon dioxide, water	Catabolic	Exothermic
B	Respiration	Oxygen, glucose	Catabolic	Exothermic
C	Photosynthesis	Oxygen, glucose	Anabolic	Endothermic
D	Respiration	Carbon dioxide, water	Anabolic	Endothermic

  Which type of reaction is occurring in y;0u/rpe,ck nvxv 48c at)6yb this light-independent reaction of photosynt/ ncvyevtcbx ,)a0 pyk8 6;4urhesis?

  Which structure of the chloroplast is most involved in the production of reduce6* rsq7iy12*p5xk5z f hesqxvd NADP and 2k56sh5 1f xr*qq xszpvie*7yATP?

The diagram shows the separation of photosyntqa70wq i2wi i3hetic pigments using the thin-layer chromatography (TL w037q iiaw2iqC) technique in the solvent propanone.

1.Identify a pigment that is present in cabbage but not in spinach
2.Outline the method used to extract the pigments from the plant leaves.
3.1Outline what information the Rf value provides in this experiment.
2.Calculate the Rf value of Xanthophyll, showing your working.
4.Spinach also contains Lycopene, an orange/red pigment. Suggest why it is absent from the chromatogram.
5.Deduce, with a reason, what pigment X is.
6.Explain why the origin must be above the solvent at the start of the experiment.
7.Explain why it is important that the TLC plate is held by its edges when setting up this experiment.

In an investigation into the impacts of climate chnjka:wrl4n(96nf/ekk ,2 .2+hqmhn fjvj/ lcange on the rate of photosynthesis, pondweed was placed in a numnhmn(: 9 ck/,wjfnf+ qj/l 6k24ahve 2kl rj.nber of sealed conical flasks, each containing a solution of water and carbonic acid.

Each conical flask was placed in a water bath maintained at a constant temperature. At regular time intervals, samples of the solution were taken from each conical flask and measured using a pH probe.

The results are shown in the table.

1.1Identify the dependent and independent variables in this investigation.
1.2State one variable that must be kept constant in this investigation to ensure the results are valid.
2Describe the relationship between the temperature, time and pH of the solution.
3Predict the pH of the dilute carbonic acid solution at $40^{\circ}C$ after 60 minutes.1
4.1Calculate the rate of change in pH between 30 - 40 minutes and 40 - 50 minutes for the trial kept at $40^{\circ}C$.
4.2Suggest a reason for the difference in the rate of change you calculated in (i).
5.Suggest one improvement to the design of this experiment and state whether it would increase the accuracy or reliability of the results.

  Which visible spectrum represents the correct range of wavelengthfy 2u )g pt704(tj*2wiclmn tvs of light that are absorbed anjp*yt u7) im fg2nt4c0(w2 ltvd reflected by chlorophyll for photosynthesis?

Photosynthesis is a process where carbon compounds are produced v d72i4hhh+njin the presence vh7ih4 hj2n+d of light.
1.Draw and label an action spectrum for photosynthesis in plants.
2.Outline how energy is used to produce glucose from carbon dioxide.
3.Describe an experiment investigating the effect of carbon dioxide concentration on the rate of photosynthesis.

  What is used to generate a proton gradient acros p(avzokcrkq1. b5x5ri/j)6 p yzwu20s the thylakoid membrane in the light-dependent reac)(jocw uxak p 512.y6kbz rpi/ 05rzvqtions of photosynthesis?

  What is the process that ta njph9l-;ib: .smn9rdzo9 mp5kes place before excited electrons are transferred from photosystem II to z59pm;m.l9dro 9bs p: ni-nhjphotosystem I?

  In which structure of the chloroplast does ribulose bisphosphate drt m+lf9i:f 1undergo carboxylat91 mi+tl:frfd ion?

  Which products are formed at the end of tqvwiq0 .t 2-ephe light-dependent and light-independenq ivwt- q0p.2et reactions?

  Thin-layer chromatography can be used to separate photosyntheticjrc1 n6 sgev2ty r6l +)zjv6z. pigments. Below is a diagram showing the separation of pigments in this way. Rf values are usr 2c1r)ve6+zyvj l6zt .j6 sgned to work out what pigments are present in the leaf extracts.
Which of the following are the measurements that need to be taken to calculate the Rf values?

The diagram below shsd3,/tmilrhx f/xl m/28 3a pqows the ultrastructure of a chloroplast.

1.Identify the enzyme that catalyses the process of carbon fixation and is found at Y.
2.Deduce, with a reason, which structure of the chloroplast has the lowest pH value.
3.State the name of the structure found in chloroplasts that consists of stacks of fluid-filled sacs, which give the chloroplast a larger surface area for light absorption.
4.Describe the factors that would increase the number of starch grains in structure Y.
5.Distinguish between photosystem II and photosystem I.
6.Describe the process of photophosphorylation in photosynthesis.

  The graph shows the aub -p 60q0wqelction spectrum for photosynthesis.

What can be directly inferred from the graph?

Photosynthesis and cellular respiration are enzy0xeq(;0 u0isg t3amf kme-catalysed reactions.
1.Outline the role of carbon dioxide in photosynthesis.
2.Describe the technological advancements and experimental tools that were used in Calvin’s experiment on photosynthesis.
3.Compare and contrast the light-dependent and light-independent reactions.

  Carbon dioxide enrichment experiments are used tof q(bmabj8f) 9 predict future rates of photosynthesis and a b9jqfm8()fbplant growth. Which of the following is an advantage of enclosed greenhouse experiments over free-air carbon dioxide experiments (FACE) experiments, when conducting carbon dioxide enrichment experiments?

  In algae, what is the roa 3z;u ddq, ihd7pgq,3le of carbon dioxide in photosystem II, and what form is it fo,7dp d; a3dqzu,3 giqhund in?

  What were the results obtained from the lollipop experiment that enabl w:zok hn+1eyk:4t7wfed Calvin to determine the order of the light-independent reactions of photew 1n zo :kkwt4yhf7:+osynthesis?