Which term describes the splitting of water molecules in the presence of light : 7auo.9 ocvib 68vxlpto produce electrons, hydrogen ions and oxygen moleovul87x av: i9o pc6b.cules?

  Which of the following is involt kco*1+sizmcc0 9t . pwfodhy*26io7ved in carbon fixation during photosynthesis?

  The diagram below shows an experimelui :is75m; 1ohs q2m*pv- krfkqn,5wnt investigating the effect of temperature on the rate of photosynthesis. Which of the following is not a method of keeping fms;w qlquv5k* i7nk -,i 5r2mps1ho:a controlled variable at a constant value throughout this particular experiment?

  What does X represent? np s dzabqh:1y1 5 ym0b23:boq

  The Hill reaction shows electron:) g1w khemh5f transfer in isolated chloroplasts for the light-dependent reactions of photosynthesis. A blue dye, DCPIP (2,6-dichlorophenolindophenol) is used instead )wf:h h1emg5k of the natural final electron acceptor. What is the final electron acceptor in photosynthesis?

  The micrograph below shows part of a chlorokq8) navt) 6q8qpy fa5plast in a leaf.Which of the following structures are f q6antv)8a5 yp8) qfqkound in the part of a chloroplast labelled X?
I.Photosystem I
II.ATP Synthase
III.Ribosomes

  This graph shows the rate of photosynthesis at -aan(m51 ygrfn5 jkb (ma,or1a z211h cvw 3sjdifferent temperatures.

What conclusion can be made?

  The graph shows the effect of light intensity on the/y an2x5-hj hc rate of photosynthesis.

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

  The following processes occur in the Calvin cycle. p zx /9t7svey8
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 )7okp vi4oj rf6w9ez9where chemiosmosis takes place in photosynthesis and aerobic cell respiration?jrfwpeov )o6i 9z47k 9

Coleus blumei is an attractive houseplant with r+rzh ,8zzeyw,o) 4 hgred 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-dependen iwb,qpfv 3/7vj7netfmw/b( 6t reactions for phfi q n wb7/mf(ve,7wpt/j6vb3 otosynthesis?

  Which of the following correctly describe ozan7 7qbk9bp).f z-qs 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 this light-independent reacn2pngv72awi 0tion of photos22 nvw 7p0iagnynthesis?

  Which structure of the chloroplast is most involved in the productgwqa,573; qb-j o swaiion of reduced NADP and ATP;wa agso3bqj7-,iw5q?

The diagram shows thpyc wkw+++u 8/i0vhgce separation of photosynthetic pigments using the thin-layer chromatography (TLC)wp kch0+yu+i/ vgc8+w 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 change on the rate of photosynsla:jr hns 2adqfb1 +(5 yup44thesis, pondweed was placed in a number of sealed conical flasks, each containing a 4lp2ydf:shj( qraus4 na 51+bsolution 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 o6hrf -j8 gtc4nba rb.g6qm(1gf wavelengths of light that are absorbed and reflected by chloroph4gr8j.m(cr-qf6t6g gha bb1n yll for photosynthesis?

Photosynthesis is a procesm2q xd1uuot k.ms6ld/*sd 53ds where carbon compounds are produced in the presence of light. dd u.x6*t2qo1msdk /dlu3 ms5
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 proto1.m2egx)9peb:x 2ae c)zbm v sn gradient across the thylakoid membrane in the l92sebe .2ze 1cabxgm:xp) m)vight-dependent reactions of photosynthesis?

  What is the process that takes place before excited electrou qn72il ed:d)ns are transferred from photosystem II to phd2e :i)n ludq7otosystem I?

  In which structure ofc*b nkdee4t0 cz mvr/- 3yn64g the chloroplast does ribulose bisphosphate undergo carboxylation?kyrn g *cbv4-3te dm40e6czn/

  Which products are formed at the end of the light-dependent and light-4oc nt 6u9cqhe ulyg/+(q3am2 l hw5u;i7t(iwindependent reactione ou/gi (cahthmw;lu6w+(t3c2iu47 l n q5y9qs?

  Thin-layer chromatography can be used to separate photos4dam yhkz04u*oj:fd67b )4 weqtsn1oynthetic pigments. Below is a dia7 dkau4ybz)hd* 06e 1qo4t4j :fmw onsgram showing the separation of 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 ultrasgf( (6xeg ,jnetructure 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 action spectrum fggqsw 95d4(yi or photosynthesis.

What can be directly inferred from the graph?

Photosynthesis and cellul:ev, jj 0+hstcodk 97var 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 experiments are used to predict fpd5gkne *l9y *l;ddp7uture rates of photosynthesis and plant growth. Which of the following is an advantage of enclosed greenhouse expe y7 5nld9kg;pp* ledd*riments over free-air carbon dioxide experiments (FACE) experiments, when conducting carbon dioxide enrichment experiments?

  In algae, what is the role of carbon dioxide in photosysol41uo +jrdf1tem II, and what form is it f 411+djou oflround in?

  What were the results obtained f)u4y0 u/ky3 (gkic qg .ssd y0tljk*k5rom the lollipop experiment that enabled Calvin to determine the order of the light-independent reu4 dggyu0( s)k*y .yk5 kji /qc03stklactions of photosynthesis?