Paper 2 style practice paper: Multiple choice (Extended) — question paper

Section A: Multiple-choice questions[40 marks]

Choose one answer for each question. Each question is worth 1 mark.

1. 1

   Which characteristic of living organisms is defined as the removal of waste products of metabolism?

   1. AExcretion
   2. BEgestion
   3. CRespiration
   4. DSensitivity
   ( )
2. 2

   Which feature is used to classify an organism as a mammal?

   1. ALaying eggs with leathery shells
   2. BHaving fur and feeding young on milk
   3. CBreathing with gills
   4. DHaving a three-part body
   ( )
3. 3

   Organisms sharing a more recent common ancestor have

   1. Aidentical plasmids
   2. Bmore different DNA base sequences
   3. Cmore similar DNA base sequences
   4. Dno DNA in common
   ( )
4. 4

   Which structure is found in both plant cells and bacterial cells?

   1. ANucleus
   2. BChloroplast
   3. CMitochondrion
   4. DCell wall
   ( )
5. 5

   A cell is viewed at magnification ×400. Its image width is 8 mm. Its actual width is

   1. A0.02 mm
   2. B0.2 mm
   3. C2 mm
   4. D3200 mm
   ( )
6. 6

   Water moves out of a plant cell placed in a concentrated sugar solution because

   1. Athe solution has a higher water potential than the cell
   2. Bthe cell has a higher water potential than the solution
   3. Cthe cell pumps water out by active transport
   4. Dthe cell wall pushes the water out
   ( )
7. 7

   Which test identifies protein in a food sample?

   1. AIodine solution turning blue-black
   2. BBenedict’s solution turning orange
   3. CBiuret solution turning purple
   4. DEthanol forming an emulsion
   ( )
8. 8

   Enzyme activity decreases sharply above a certain temperature because

   1. Athe substrate is used up
   2. Bthe pH rises to zero
   3. Cthe enzymes reproduce too fast
   4. Dthe enzymes denature
   ( )
9. 9

   Which factor is NOT a limiting factor of photosynthesis?

   1. ABlood flow through the leaf
   2. BLight intensity
   3. CTemperature
   4. DCarbon dioxide concentration
   ( )
10. 10

    Which region of a leaf contains most of the chloroplasts for photosynthesis?

    1. AUpper epidermis
    2. BPalisade mesophyll
    3. CLower epidermis
    4. DWaxy cuticle
    ( )
11. 11

    A deficiency of vitamin C in the diet causes

    1. Arickets
    2. Banaemia
    3. Cscurvy
    4. Dnight blindness
    ( )
12. 12

    The products of digestion are absorbed into the blood mainly through the

    1. Astomach wall
    2. Boesophagus
    3. Clarge intestine wall
    4. Dvilli of the small intestine
    ( )
13. 13

    Water moves up a plant stem mainly through the

    1. Axylem
    2. Bphloem
    3. Ccortex
    4. Dstomata
    ( )
14. 14

    A potometer measures 6.0 cm³ of water taken up in 3.0 minutes. The rate of water uptake is

    1. A0.5 cm³ per minute
    2. B2.0 cm³ per minute
    3. C3.0 cm³ per minute
    4. D18 cm³ per minute
    ( )
15. 15

    Which chamber of the heart pumps oxygenated blood to the whole body?

    1. ARight atrium
    2. BRight ventricle
    3. CLeft ventricle
    4. DLeft atrium
    ( )
16. 16

    During blood clotting, fibrinogen is converted to fibrin, which

    1. Adissolves oxygen
    2. Bcarries carbon dioxide
    3. Cmakes antibodies
    4. Dforms a mesh trapping blood cells
    ( )
17. 17

    A pathogen is best described as

    1. Aa disease-causing organism
    2. Ba white blood cell
    3. Ca vaccine ingredient only
    4. Da type of antibody
    ( )
18. 18

    Vaccination gives long-term immunity because memory cells are produced after

    1. Aantibiotics kill the pathogen
    2. Blymphocytes respond to the vaccine antigens
    3. Cstomach acid digests the vaccine
    4. Dthe skin blocks the antigen
    ( )
19. 19

    Compared with inspired air, expired air contains

    1. Amore oxygen and less carbon dioxide
    2. Bmore oxygen and more carbon dioxide
    3. Cless oxygen and more carbon dioxide
    4. Dthe same amounts of both gases
    ( )
20. 20

    Anaerobic respiration in yeast produces

    1. Alactic acid and oxygen
    2. Bprotein and alcohol
    3. Ccarbon dioxide and water
    4. Dalcohol and carbon dioxide
    ( )
21. 21

    Urea is formed in the

    1. Aliver
    2. Bkidney
    3. Cbladder
    4. Dlungs
    ( )
22. 22

    In a healthy nephron, which substance is completely reabsorbed into the blood?

    1. AUrea
    2. BGlucose
    3. CExcess ions
    4. DExcess water
    ( )
23. 23

    The correct order of structures in a simple reflex arc is

    1. Areceptor → motor neurone → sensory neurone → relay neurone → effector
    2. Beffector → relay neurone → motor neurone → sensory neurone → receptor
    3. Creceptor → sensory neurone → relay neurone → motor neurone → effector
    4. Dreceptor → relay neurone → motor neurone → sensory neurone → effector
    ( )
24. 24

    In bright light, the pupil constricts because the circular muscles of the iris

    1. Arelax while the radial muscles contract
    2. Bsecrete mucus
    3. Cpull on the lens
    4. Dcontract while the radial muscles relax
    ( )
25. 25

    Insulin lowers blood glucose concentration by making the liver

    1. Astore glucose as glycogen
    2. Brelease glucose from glycogen
    3. Csecrete glucagon
    4. Dexcrete glucose in urine
    ( )
26. 26

    A shoot bends towards light because auxin accumulates on the shaded side and

    1. Akills the cells there
    2. Bstimulates cell elongation there
    3. Cstops photosynthesis there
    4. Dmakes the cells shrink
    ( )
27. 27

    Pollination is defined as the transfer of pollen grains from

    1. Astigma to anther
    2. Bovule to ovary
    3. Canther to stigma
    4. Dpetal to petal
    ( )
28. 28

    The fetus is protected against mechanical damage by the

    1. Aumbilical cord
    2. Boviduct
    3. Cplacenta
    4. Damniotic fluid
    ( )
29. 29

    In a cross between two heterozygous tall plants (Tt × Tt), the expected ratio of tall to short offspring is

    1. A3:1
    2. B1:1
    3. C1:2:1
    4. Dall tall
    ( )
30. 30

    A test cross between an unknown tall pea plant and a short plant (tt) produces all tall offspring. The unknown plant was

    1. Aheterozygous (Tt)
    2. Bhomozygous dominant (TT)
    3. Chomozygous recessive (tt)
    4. Dunable to be determined
    ( )
31. 31

    Red-green colour blindness is more common in males because the allele is

    1. Adominant and on the Y chromosome
    2. Bon every chromosome
    3. Crecessive and on the X chromosome
    4. Dpassed only by mothers to daughters
    ( )
32. 32

    Body mass in humans is an example of

    1. Adiscontinuous variation caused by genes only
    2. Bno variation at all
    3. Cdiscontinuous variation caused by the environment only
    4. Dcontinuous variation caused by genes and the environment
    ( )
33. 33

    New alleles first arise by

    1. Amutation
    2. Bnatural selection
    3. Cselective breeding
    4. Dcompetition
    ( )
34. 34

    In natural selection, individuals that are better adapted to the environment are more likely to

    1. Astop mutating
    2. Breproduce and pass on their alleles
    3. Cbecome fossils immediately
    4. Dchange their own genes deliberately
    ( )
35. 35

    The organism at the start of every food chain is a

    1. Aconsumer
    2. Bdecomposer
    3. Cproducer
    4. Dquaternary consumer
    ( )
36. 36

    In eutrophication, fish die mainly because decomposers

    1. Apoison the water with fertiliser
    2. Beat the fish
    3. Cblock sunlight permanently
    4. Drespire aerobically, using up dissolved oxygen
    ( )
37. 37

    Which gas, produced by livestock and landfills, enhances the greenhouse effect?

    1. AMethane
    2. BNitrogen
    3. COxygen
    4. DHydrogen
    ( )
38. 38

    Ethanol for biofuels is produced by

    1. Abacteria photosynthesising
    2. Byeast respiring sugars anaerobically
    3. Cpectinase acting on cellulose
    4. Dboiling plant oil
    ( )
39. 39

    In genetic modification, the enzyme that joins human DNA into a plasmid is

    1. Arestriction enzyme
    2. Bamylase
    3. CDNA ligase
    4. Dpepsin
    ( )
40. 40

    One reason GM crops are controversial is that resistance genes could

    1. Aimprove crop taste
    2. Beliminate all insects worldwide
    3. Cmake crops grow in the dark
    4. Dspread into wild plant populations
    ( )