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Specimen QP - Paper 1 OCR (B) Biology GCSE.pdf - PMT F GCSE...

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© OCR 2015J257/01Turn over[601/8506/5] DC (…)D10022/21GCSE (9–1) Biology B (Twenty FirstCentury Science)J257/01 Breadth in biology (Foundation Tier)Sample Question PaperDate – Morning/AfternoonTime allowed: 1 hour 45 minutesYou may use:• a scientific or graphical calculator*000000*FirstnameLast nameCentrenumberCandidatenumberFINSTRUCTIONSUse black ink. HB pencil may be used for graphs and diagrams only.Complete the boxes above with your name, centre number and candidate number.• Answerallthe questions.Write your answer to each question in the space provided.Additional paper may be used if required but you must clearly show your candidatenumber, centre number and question number(s).• Donotwrite in the bar codes.INFORMATIONThe total mark for this paper is90.The marks for each question are shown in brackets[ ].This document consists of28pages.SPECIMENPMT
2Answerallthe questions.1 (a)In humans, sex is determined by chromosomes.Write down the combination of sex chromosomes in the body cells of females and males.Females...............................Males...............................[1](b)(i)In alligators, sex is determined by the temperature at which the fertilised eggs areincubated.The data below shows the effect of temperature on sex determination.Temperature(C)Number offemalesPercentage offemales (%)Number ofmalesPercentage ofmales (%)30001510031746.7853.33296331510000Calculate the percentage of alligators that hatched as males and females when incubatedat 32C.Females...............................%Males...............................%[2](ii)What can be concluded about the effect of temperature on sex determination in alligators?SPECIMENPMT
© OCR 2015J257/01
3© OCR 2015J257/01Turn over(c)(i)Alligators eat fish, birds, turtles and snakes.These foods are high in protein.Put a tick () in the box that describes what proteins are made of.Amino acidsFatty acidsGlycerolSugars[1]

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Term
Spring
Professor
Apolinario
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