Pearson BTEC Level 3 Nationals Certificate Tuesday 21 May

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Please check the examination details below before entering your candidate informationCandidate surnamePearson BTECLevel 3NationalsCertificateOther namesCentre NumberLearner Registration NumberTuesday 21 May 2019Afternoon (Time: 40 minutes)Paper Reference 31617H/1BApplied Science/Forensic and CriminalInvestigationUnit 1: Principles and Applications of Science IBiologySECTION A: STRUCTURES AND FUNCTIONS OF CELLS AND TISSUESYou must have:A calculator and a ruler.Total MarksInstructionsblack ink or ball-point pen. UseFill in the boxes at the top of this page with your name, centrenumber and learner registration number.Answer Answer allthequestions.in the spaces provided – there may bequestionsmore space than you need.Informationexam comprises three papers worth 30 marks each. TheSection A: Structures and Functions of Cells and Tissues (Biology). Section B: Periodicity and Properties of Elements (Chemistry).Section C: Waves in Communication (Physics).The total mark for this exam is 90.The marks for each question are shown in brackets– use this as a guide as to how much time to spend on each question.Adviceeach question carefully before you start to answer it. ReadTrytoevery question. Checkanswer your answers if you have time at the end.Turn overP61810A 2019 Pearson Education Ltd.1/1/1/1/1/*P61810A0112*

DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA*P61810A0212*2DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREABLANK PAGE

DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREAAnswer ALL questions. Write your answers in the spaces provided.Some questions must be answered with a cross in a box . If you change your mind aboutan answer, put a line through the box and then mark your new answer with a cross .1 The human respiratory system contains ciliated epithelial cells.Ciliated epithelial cells are eukaryotic.(a) Which cell component is only found in eukaryotic cells?(1)A capsuleB cell membraneC nucleusDO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREAD plasmid(b) Table 1 compares squamous epithelial tissue and columnar epithelial tissue.squamous tissuelocation in therespiratory systemdescription of theshape of the cellscolumnar tissue(i)(ii). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .(iii)rectangular. . . . . . . . . . . . . . . . . . . . .Table 1Identify the missing words in Table 1.(1)(i). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA(1)(ii). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .(1)(iii). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .(Total for Question 1 4 marks)*P61810A0312*3Turn over

DO NOT WRITE IN THIS AREAThe leaf is made of layers of cells.One layer is the palisade mesophyll layer.DO NOT WRITE IN THIS AREA2 Figure 1 shows the structure of a leaf.XY . .A tissue is a group of similar, . . . . . . . . . .cells that have a specific .Sentence 1(a) Give the correct words for X and Y to complete Sentence 1.DO NOT WRITE IN THIS AREASentence 1 gives an incomplete definition of a tissue.DO NOT WRITE IN THIS AREAThe palisade mesophyll layer is a tissue.DO NOT WRITE IN THIS AREAFigure 1DO NOT WRITE IN THIS AREApalisademesophyll(2)X. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Y. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4*P61810A0412*

DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA(b) A palisade mesophyll cell contains a vacuole.Explain how the vacuole in a palisade mesophyll cell helps to increase the rate of photosynthesis.(3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA(c) Figure 2 shows an electron micrograph of a cross section of a palisade mesophyll cell.DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREAMFigure 2Identify the cell structure labelled M in Figure 2.(1)A amyloplastB cell wallC plasmodesmataD tonoplast(Total for Question 2 6 marks)*P61810A0512*5Turn over

DO NOT WRITE IN THIS AREAacetylcholinesynaptic cleftreceptorDO NOT WRITE IN THIS AREA3 Figure 3 shows a synapse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6*P61810A0612*DO NOT WRITE IN THIS AREA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .DO NOT WRITE IN THIS AREA(2)DO NOT WRITE IN THIS AREA(a) Describe the function of a synapse.DO NOT WRITE IN THIS AREAFigure 3

DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA(b) (i) Identify the correct statement.(1)A acetylcholine is an enzymeB acetylcholine is a hormoneC acetylcholine is a neurotransmitterD acetylcholine is a vesicle(ii) Explain what happens to acetylcholine after its function is complete.(3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .(c) Acetylcholine causes the release of hydrochloric acid in the stomach.Nicotine is an agonist for acetylcholine.Explain why nicotine causes higher levels of hydrochloric acid in the stomach.(4). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .(Total for Question 3 10 marks)*P61810A0712*7Turn over

DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA*P61810A0812*8DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREABLANK PAGE

DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA4 (a) 1500 Gram-positive bacteria are placed on nutrient agar gel in a Petri dish.The number of Gram-positive bacteria doubles every 20 minutes when thebacteria divide.The total number of bacteria can be calculated using the formula:total number of bacteria bacteria at beginning 2nn number of divisions.Calculate the total number of Gram-positive bacteria in the Petri dish after two hours.Show your working.(4)total number of bacteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*P61810A0912*9Turn over

Figure 4 shows Gram-negative bacteria and Gram-positive bacteria growing ontwo separate nutrient agar plates.There is a disc of penicillin in the centre of each agar plate.disc ofpenicillinFigure 4Discuss why penicillin prevents the growth of Gram-positive bacteria but notGram‑negative bacteria.Your answer should refer to the differences in the cell walls of the two types of bacteria.(6)DO NOT WRITE IN THIS AREAGram-positive bacteriaDO NOT WRITE IN THIS AREAGram-negative bacteriano Gram-positive bacteriaDO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREAPenicillin stops Gram-positive bacteria from dividing.DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA(b) Penicillin is an antibiotic used to treat Gram-positive bacterial infections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Biology SECTION A: STRUCTURES AND FUNCTIONS OF CELLS AND TISSUES Tuesday 21 May 2019 Total Marks Afternoon (Time: 40 minutes) Paper Reference 31617H/1B Pearson BTEC Centre Number Learner Registration Number Level 3 Nationals Certificate Candidate surname Other names Please check the exa

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