Which term describes (safmg/o 3j2odin 9x4the splitting of water molecules in the presence of light to produce electrons, hydrogen ions and oxygen molesd3o2om(4gfn ja/i x9cules?

  Which of the following is invo1fn7z,ytz:pyzq1jf pub/29bd vo /v0lved in carbon fixation during photosynthesis?

  The diagram below shows an experime2)y/ndg9uom d;u)g jsnt investigating the effect of temperature on the rate of photosynthesis. Wd;g/s 2)g9my)uound j hich of the following is not a method of keeping a controlled variable at a constant value throughout this particular experiment?

  What does X represent-l4a hw 0+xkjj?

  The Hill reaction shows electron transfer in isolated chloroplasts for the light/hr zj b8g:vip 73si1)bct* fy:hxf)j -dependent reactions of photosynthesis. A blue dye, DCPIP (2,6-dichlorophenolindoct sbixbrvijj87zgy:)3fph f* h) /1:phenol) is used instead of the natural final electron acceptor. What is the final electron acceptor in photosynthesis?

  The micrograph below shows part of a chloroplad zg1dr- ;sx:fst in a leaf.Which of the following structures are found in the part of a chloroplast lgdd1x;f- zr :sabelled X?
I.Photosystem I
II.ATP Synthase
III.Ribosomes

  This graph shows the rate o-dtwhvs+z 2r tg73g :xf photosynthesis at different temperatures.

What conclusion can be made?

  The graph shows the effect of light intensity on the rate of photosynthesi4ob :i45y j qic(js3b qfk(suwjp 2r9:s.

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

  The following processes occur in the Calvin ej5l kt;laxpame+ g- q(*x.g0 cycle.
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 chema 0c3q87,1juzwjk ihkiosmosis takes place in photosynthesis and aerobic cell respiration?khk7j3ci1 8qu ajw,z0

Coleus blumei is an atac 3 v q-aw+4ip.0zdpftractive 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-depenb twwpj.w, cf0elq,-:dent reactions for photosynthe:0wftqc, .ww,bpl j e-sis?

  Which of the following correctly describes photosynthesi de h)z2xi64a+o(p dgys 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-independent reaction of photos-+,sf-zv)t fam 0w dk7h)yj(uoef zf +yntfo-e ufz)j(f, +a 7wsd-vf+0h kzmy)thesis?

  Which structure of the chloroplast is most pg-hpwug ;33lf v(u :+gve rg*u;a mj9involved in the production of reduced NADgeg lgvu*jrppg a(w: v;u;+m 33-u9hfP and ATP?

The diagram shows the n:87c yn9c4i fkzf w3dseparation of photosynthetic pigments using the thin-layer chromatography (TLC) technique in the solvent pz3 iyknd:78c94ncfw f ropanone.

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 change on the rag417q olu2ogay-06.nhdh:gtc kj:,v o k7caw te of photosynthesis, pondweed was placedyojauhv6 gc2k:7 l 0o-c:w1dhk 4got na7g.q, in a number 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 represet-,uo c.5h hbu 2g(.+qblgc0walr au: nts the correct range of wavelengths of light that are absorbed and reflected b:t wcl.(, grhab5u+bh20u.lcua gq-oy chlorophyll for photosynthesis?

Photosynthesis is a process wheo g/;tkx 0ujh(re carbon compounds are produced in the presence of lix kgou;(0tj/h ght.
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 gio px 1nb4m kw,;2rvx lh0xy+6radient across the thylakoid membrane in the light-dependent reactions of pho,xxo ivn2y;14hx6 pwk+br0 lmtosynthesis?

  What is the process that takes place before excited 0tw5c tfwy2 6rrm*nsy-mw:(aelectrons are transferred from pho m*0 m cw(aytf6rn2swtyr 5-:wtosystem II to photosystem I?

  In which structure of the chloroplast does ribulose bisphosphate undergo car5v3q9xd-beexv8: uq yu iu2z2drdl re 584v9 gboxy5 d eve 3-li8zrrq9beu248 v5:qdg2xxvduy9u lation?

  Which products are formed at the endy sy79exz paa(ny:*9x:xg g/h of the light-dependent and light-independent reacti:y*gs/ p9e9xgxzxn( yaa:h7yons?

  Thin-layer chromatography can be used to separate photosynthetic p4v7 gffbzu. *7/q qeuiigments. Below is a diagram showing the separation of pigments in this way. Rf values are used to work out what pigments are 4zuf g/f 7qi.ebq7u*vpresent 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 of a chlg9-bvtxl.a96lze,d coroplast.

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 s q)4x b,f(c8peubqt3 ee9f o.cpectrum for photosynthesis.

What can be directly inferred from the graph?

Photosynthesis and cellular respiration are enzymehyk-pvm0 g8u d y)*ll9;zfy6i-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 to predict future wj5p *kgw .gk)rates of photosynthesis and plant growth. Which of the following is an advantage of enclosed greenhouse experiments over free-air carbon dioxide experiments (FACE) experiments, when conductingwg.kkp j *g5)w carbon dioxide enrichment experiments?

  In algae, what is the role of carbon dioxide in photosystem Ibday3l z63lpg zn*-(i I, and what form is it found i6bn-l da*(y3 z3 lgipzn?

  What were the results obtained from the lollipop experiment that enabled Cal-o yhh b qk+fq:b4p69tvin to d-qpbt4 f+hoq9bk6 :hy etermine the order of the light-independent reactions of photosynthesis?