Which term describes the splitting of water molex204ujszxqc 7 cules in the presence of light to produc7cxq0 zx2 u4sje electrons, hydrogen ions and oxygen molecules?

  Which of the following is inv*2nvu:iow x5xaml;)yolved in carbon fixation during photosynthesis?

  The diagram below shows am6t+sj1o eo. gi*lz -r6rprh 7n experiment investigating the effect of temperature on the rate of photosynthesis. Which of the following is not a method of zl. r- oj6sgr+proih1 mt*e76 keeping a controlled variable at a constant value throughout this particular experiment?

  What does X represents ;ypf*n:2 yut?

  The Hill reaction shows electron transfer in isolated chloroplasts for p3 rtp k0ze-c-(mx; nothe light-dependent reactions of photosynthesis. A blue dye, DCPIP (2,6-dichlorophenolindophenol) is used instead of the natural final electron t-mpp0zr - one;x3 k(cacceptor. What is the final electron acceptor in photosynthesis?

  The micrograph below shows part of a chloroplast in ai.cgv4 0m. axz9s7p hj leaf.Which of the following structures are found iv.g0pm zaix49c7.j h sn the part of a chloroplast labelled X?
I.Photosystem I
II.ATP Synthase
III.Ribosomes

  This graph shows the rate of photosynthesis at different tyrvf z)1q3v iw6ssk 83emperatures.

What conclusion can be made?

  The graph shows the effect of light intensiyrq pchde kj422epn(f6h6x+hd,*v- fty on the rate of photosynthesis.

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

  The following processes occur in the Calvin sza87 s 7n9adgcycle.
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 whgz,uch5*e( lerv4/3 ;jgymalhqcv e l3j*/3 pere chemiosmosis takes place in photosynthesis and aerobic j3*//vrh*mgy 4 u 5jp q3e3(ee cz;,llagchvlcell respiration?

Coleus blumei is an attractive houseplh7-6z5 9 glvf;te:roay6;dvk h1uaqoant 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 hydp (i7wb:gr1 h.f/vqrqrogen ions in the light-dependent reactions for photosynthev7pb1 f.h:iq( gqr/rw sis?

  Which of the following cor)wnf4e;1 nxuorectly describes 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 ,lkm uqrs p (njnf:83ter*26k in this light-independent reaction of photosynthesisknsu6j2t(*l,mnr q: e8 pf kr3?

  Which structure of the chloroplast is most involved in the productbjig4w4*cf +iion of reduced N4ibi4*j+f wc gADP and ATP?

The diagram shows the separation of photosynthetic pigments using the thin-layer.ad2h0 apv 3ww chromatography (TLC) technique in the solvent propanone.vdaw.02 hp3w a

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 cjzj 59 x9wy e k4p8/auavqmv4-limate change on the rate of photosynthesis, pondweed was placed in a njxwevm -y 854p z9akqv au94j/umber 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 waveleng2 1k 6:wjsdf9 sp(gxp/5wvltqths of light that aq(5 l6sv: 9sd2jppkx t1f/gww re absorbed and reflected by chlorophyll for photosynthesis?

Photosynthesis is a process where carbotvsb n8ln,dcn t;//h9n compounds are produced in the presence of ldnh9 ,t cn;8l btvns//ight.
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 the thylakoid membranevv:k+c9/: aizc+rc mr in the light-dependent reactions of photosynth :z+c/ri9 mkv:acr +vcesis?

  What is the process that takes place before excited electrons ardub6i:x5x q .;cm4i*tm a;e kce transferred fromku4cba d; mcite*:. imqx;x56 photosystem II to photosystem I?

  In which structure of the chloroplast does ribulcbvvb a43faiz; h 9ax8- 67hjmose bisphosphate undergo carboxylatioa ;c m3- z6j8a9vh hxav7ibb4fn?

  Which products are formed at the end of the light-dependz i*zb9n9 *2mmoq)uod8l)to hent and light-independent reactiouh2lo*ndm9)qb *8zomt)i 9zo ns?

  Thin-layer chromatogr ,77d -m2i, xxax rnjijz 02kivtqv/6daphy can be used to separate photosynthetic pigments. Below is a diagram showing the separation of/2njjx q26d vrxdvai0 z7, i-xtkm 7,i pigments in this way. Rf values are used 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 shows the ultrastructure ocz+)440 q1nnwcch:pq,k2sgt4 cltz5c7 rt nl f 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 action spectrojbl6kh hj a+ m6p, ,(vtj/up+um for photosynthesis.

What can be directly inferred from the graph?

Photosynthesis and cellular respiration are enzyme-catalysed reactions.(2 bi7fvm f;cf
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 to predict future ra+93r*t5(vwvm sb teugyu l 0k(tes of photosynthesis and plant growth. Which of the following is an advantage of enclosed greenhouse experiments over free-air carbon dioxide expr v(uws5y30e tv m(9g t+*kubleriments (FACE) experiments, when conducting carbon dioxide enrichment experiments?

  In algae, what is the pv+5 v6y,zvkyhvr ;8urole of carbon dioxide in photosystem II, and what form is i5z;kvh8+6,v yurvvyp t found in?

  What were the results obta a7 58bfnucpc4*au,ng ined from the lollipop experiment that enabled Calvin to determine the order of the light-ina nugpbn*,754cau c f8dependent reactions of photosynthesis?