Which term describes thel)b x4 g-hqbd: splitting of water molecules in the presence of light to produce elhlx: b4bdg q)-ectrons, hydrogen ions and oxygen molecules?

  Which of the following is involved in carbon fitxgf w(uz;y9 gba1r4.xation during photosynthesis?

  The diagram below shows an experiment investigating the effect of temper1mn,tr ey t89a +rn6uoature on8 rtrtenn 6,o+u1ym a9 the rate of photosynthesis. Which of the following is not a method of keeping a controlled variable at a constant value throughout this particular experiment?

  What does X represenusfn: f8ea: 1tt?

  The Hill reaction shows e.m4uecq*t v1b z,hhp4lectron transfer in isolated chloroplasts for the light-dependent reactions of photosynthesis. A blue dye, DCPIP (2,6-dichlorophenolindophenol) is used instead of the natural final electron . zvqt1h4 4muhe*bcp, acceptor. What is the final electron acceptor in photosynthesis?

  The micrograph below shows pa2g:w o55 puzg/gzsrf8rt of a chloroplast in a leaf.Which of the following structures are found in the part of a chlorw8fgzo5r g g25zs /u:poplast labelled X?
I.Photosystem I
II.ATP Synthase
III.Ribosomes

  This graph shows the rate of photosynthesis at differvw k.p qoz9p+2ent temperatures.

What conclusion can be made?

  The graph shows the effectaiz5h2 ak/8k2 eaxc n) 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. ql-a c/ 629l ebh/kecbufbt , r4z2in0
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 correctly shows where chemiosmosissd e4- 3qq7nm6x(r vmy takes place in photosynthesis and aerobic cell mxsnevy3 6rqdm(q 7 4-respiration?

Coleus blumei is an attractivh5iu 6t)nsk 6le 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 lik dtlwj9 y5 0npycj4(4eb v:w0ght-dependent reactions for photy9054 yvdlke0wjpncwt ( b:4j osynthesis?

  Which of the following correctly describes phot xq8ftkr(0ca 8 kz((vxosynthesis 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 this light-independe(ul gwxp q,2y5nt reaction of photosynt,(52uq xpygl whesis?

  Which structure of the chloroplaxs16vl ta;;ty st is most involved in the production of reduced NAa6; vtx ys1tl;DP and ATP?

The diagram shows the separatio0t4rkmf 6cl / 8s-dctrn of photosynthetic pigments using the thin-layer c8rkfct 04tl /dms-r6chromatography (TLC) 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 caw ik .w47xl2slimate change on the rate of photosynthesis, pondweed was placed in a 2wik4 .xa7lswnumber 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 wavel zot bw2i mo+leg8qais69,u; vj/j,:jengths of light that a8m ojo j26+tgze;/j, v9qib sau:wi, lre absorbed and reflected by chlorophyll for photosynthesis?

Photosynthesis is a process where carbon compounds are qn4njjx 73dj5 produced in the presence oj4n7nxj 35jd qf 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 across tp; 6lj.w(i7 urkkfg9pd 3pg1vhe thylakoid membrane in the ligh1fgu p79vkdk(j3w p6 .gi;rlpt-dependent reactions of photosynthesis?

  What is the process that takes place before excited electr1 01h lxs)nyrkons are transferred from photosystem rxs1yhn1) 0l kII to photosystem I?

  In which structure of the chloroplast does ribulose bisphosphate undergo card6vb e9 lclr7 hat6u:2boxylatitb7r2:edl ahc l 6uv69on?

  Which products are formed at the end of the light-dependent and lightka i5yq -vc0+/ey cue2-independent reactqyc+aee k5-iu0cv2 / yions?

  Thin-layer chromatography can be used to sekjfm (btu*7o3 parate photosynthetic pigments. Below is a diagram showing the separation of pigments in this way. Rf values are used to work out what pigments are present in the lea3k(t uof*m7jb f extracts.
Which of the following are the measurements that need to be taken to calculate the Rf values?

The diagram below shows the ultrastructure of a chl kxqz)+kr:7t aoroplast.

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 action spectrum for photosynthesisj6 hz,pmdk8x f.lef1 1.

What can be directly inferred from the graph?

Photosynthesis and cellula heurqqw8 */.yr respiration are enzyme-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 experimfe;wchen t9.7 ents are used to predict future rates of photosynthesis and plant growth. Which of the following is an advantage of enclosed greenhouse eew cn9h7.ft ;experiments over free-air carbon dioxide experiments (FACE) experiments, when conducting carbon dioxide enrichment experiments?

  In algae, what is the role of carbon dioxide in photosystem II, and.fgfi. fvbq ;5 what form is it founfb5 qiv; g.ff.d in?

  What were the results obtained from the lollipop eh.tyg :)s.xhuxperiment that enabled Calvin to determine the order of the light-independent rehgx.)htu sy. :actions of photosynthesis?