当前位置：文档库 › IB数学SL真题

IB数学SL真题

2210-6007

21 pages

M10/4/BIOLO/HPM/ENG/TZ1/XX+

Monday 17 May 2010 (afternoon)Biology

HigHer level PaPer 1

INSTRUCTIONS TO CANDIDATES

? Do not open this examination paper until instructed to do so.? Answer all the questions.

? For each question, choose the answer you consider to be the best and indicate your choice on

the answer sheet provided.

1 hour

22106007

1. The lengths of a sample of tiger canines were measured. 68 % of the lengths fell within a range

between 15 mm and 45 mm. The mean was 30 mm. What is the standard deviation of this sample?

A. 5 mm

B. 15 mm

C. 7.5 mm

D. 30 mm

2. Which of the following are features of prokaryotes and eukaryotes?

70S ribosomes80S ribosomes Naked DNA DNA associated

with proteins

A.prokaryote eukaryote prokaryote eukaryote

B.eukaryote prokaryote eukaryote prokaryote

C.eukaryote prokaryote prokaryote eukaryote

D.prokaryote eukaryote eukaryote prokaryote

3. Which statement is part of the cell theory?

A. Cells are composed of organic molecules.

B. Cells have DNA as their genetic material.

C. Cells have cytoplasm surrounded by a membrane.

D. Cells come from pre-existing cells.

4. What route is used to export proteins from the cell?

A. Golgi apparatus → rough endoplasmic reticulum → plasma membrane

B. Rough endoplasmic reticulum → Golgi apparatus → plasma membrane

C. Golgi apparatus → lysosome → rough endoplasmic reticulum

D. Rough endoplasmic reticulum → lysosome → Golgi apparatus

5. Which of the following take(s) place during either interphase or mitosis in animal cells?

I. Re-formation of nuclear membranes

II. Pairing of homologous chromosomes

III. DNA replication

A. I only

B. I and II only

C. II and III only

D. I and III only

6. Which substance in prokaryotes contains sulfur?

A. DNA

B. Phospholipids

C. Proteins

D. Antibiotics

Which describes these molecules correctly?I.

II.

II A.ribose amino acid B.glucose amino acid C.ribose fatty acid D.

glucose

fatty acid

C O

CH 2OH

H C C C C OH H

H OH

H O H

C OH

(C H 2)n

CH 3

8. What sequence of processes is carried out by the structure labelled X during translation?

U A C

A U G C C G U A C G A U C

5′3′

A. Combining with an amino acid and then binding to an anticodon

B. Binding to an anticodon and then combining with an amino acid

C. Binding to a codon and then combining with an amino acid

D. Combining with an amino acid and then binding to a codon

9. The diagram below shows a biochemical pathway in a yeast cell. Which of the following correctly

identifies a compound in the diagram?

A. I is fat.

B. II is pyruvate.

C. III is lactate.

D. IV is carbon dioxide.

10. Which of the following factors influence(s) the rate of oxygen production in photosynthesis?

I. Temperature

II. Wavelength of light

III. Number of mitochondria

A. I only

B. I and II only

C. II and III only

D. I, II and III

11. In some people, hemoglobin always contains the amino acid valine in place of a glutamic acid at one

position in the protein. What is the cause of this?

A. An error in transcription of the hemoglobin gene

B. An error in translation of the mRNA

C. Lack of glutamic acid in the diet

D. A base substitution in the hemoglobin gene

12. What is a suspected heterozygous individual crossed with in a test cross?

A. Homozygous dominant

B. Homozygous recessive

C. Heterozygous dominant

D. Heterozygous recessive

13. Which of the following genotypes is possible in the offspring of a homozygous male with blood

group A and a female with blood group B?

A. I A I A

B. I A i

C. ii

D. I B i

14. What type of inheritance is shown in this pedigree chart?

A. X-linked dominant

B. Y-linked dominant

C. X-linked recessive

D. Y-linked recessive

15. What is a community? A. A group of organisms living and interacting in the same trophic level B. A group of populations living and interacting in a food chain

C. A group of organisms of the same species living and interacting in an ecosystem

A group of populations living and interacting in an area

16. What are the units of a pyramid of energy? A. kJ m yr

B. kJ m yr

C. J m s

J m s

17. Population size is influenced by certain factors.

If I = immigration, E = emigration, N = natality, M = mortality and (N + M) = (I + E) = 0, which

phase is this population in? A. Exponential phase B. Transitional phase C. Plateau phase

Growth phase

18. An animal has radial symmetry, a sac-like body with only one opening and tentacles with stinging

structures. To which phylum does this animal belong? A. Annelida B. Cnidaria C. Mollusca

Porifera

1? 2? 1? 1

? 1? 3? 2 1?

19. Which of the following are used as evidence for evolution?

I. Homologous structures

II. Selective breeding of domesticated animals

III. Overproduction of offspring

A. I and II only

B. I and III only

C. II and III only

D. I, II and III

20. Which of the following is correct for lipase?

Substrate Source pH optimum

A.triglycerides pancreas pH = 8

B.fatty acids small intestine pH = 7

C.triglycerides small intestine pH = 9

D.fatty acids pancreas pH = 9

21. What prevents antibiotics from being effective against viruses?

A. Viruses have a high rate of mutation.

B. Viruses have no RNA.

C. Viruses have no metabolism.

D. Viruses have a protein shell that protects them.

22. The diagram below shows the human heart. What structures are indicated by the labels X, Y and Z?

[Source: adapted from https://www.wendangku.net/doc/9e4305803.html,/102spareparts/images/heart2.gif]

X Y Z

A.left atrium aorta semi-lunar valve

B.left atrium aorta atrio-ventricular valve

C.right atrium pulmonary artery atrio-ventricular valve

D.right atrium pulmonary artery semi-lunar valve

23. Which muscles contract to cause air to pass into the lungs through the trachea?

A. Internal intercostal muscles and diaphragm

B. Internal intercostal muscles and abdomen wall muscles

C. External intercostal muscles and diaphragm

D. External intercostal muscles and abdomen wall muscles

24. The diagram below shows the changes in membrane potential during an action potential. What occurs at the stages labelled 1 and 2?

M e m b r a n e p o t e n t i a l / m V

+ 60+ 40

– 40– 60

–100

Action potential Threshold potential Resting potential

0 1 2 34 5 6 7 8

Time / msec

A.Na + ions diffuse in;

inside becomes more positive K + ions diffuse out;

inside becomes more negative B.K + ions diffuse out;

inside becomes more negative Na + ions diffuse in;

inside becomes more positive C.Na + ions diffuse out;

inside becomes more negative K + ions diffuse out;

inside becomes more positive D.

Na + ions diffuse in;

inside becomes more positive

K + ions diffuse in;

inside becomes more negative

25. What are the roles of testosterone in males? A. Stimulation of FSH production and growth in puberty

B. Pre-natal development of genitalia and development of secondary sexual characteristics

C. Development of genitalia and pre-natal secondary sexual characteristics

Stimulation of FSH production and pre-natal development of secondary sexual characteristics

26. What is the reason for Okazaki fragments being formed during DNA replication?

A. To enable replication of the 3′ → 5′ (lagging) strand

B. To form the template for the RNA primers

C. To initiate replication on the 5′ → 3′ (leading) strand

D. To help the DNA helicase unwinding the DNA helix

27. Which is correct for the non-competitive inhibition of enzymes?

Inhibitor resembles

substrate Inhibitor binds to active site

A.yes yes

B.yes no

C.no yes

D.no no

28. What is removed during the formation of mature RNA in eukaryotes?

A. Exons

B. Introns

C. Codons

D. Nucleosomes

29. During glycolysis a hexose sugar is broken down to two pyruvate molecules. What is the correct

sequence of stages?

A. Phosphorylation → oxidation → lysis

B. Oxidation → phosphorylation → lysis

C. Phosphorylation → lysis → oxidation

D. Lysis → oxidation → phosphorylation

30. Where are the light-dependent and light-independent reactions taking place in the diagram below?

I II

IV III

Light-dependent Light-independent

A.I IV

B.II III

C.III II

D.IV I

31. What are differences between monocotyledonous and dicotyledonous plants?

Monocotyledonous Dicotyledonous

A.parallel venation;

floral organs in multiples of 4 or 5net-like venation;

floral organs in multiples of 3

https://www.wendangku.net/doc/9e4305803.html,-like venation;

floral organs in multiples of 3parallel venation;

floral organs in multiples of 4 or 5

https://www.wendangku.net/doc/9e4305803.html,-like venation;

floral organs in multiples of 4 or 5parallel venation;

floral organs in multiples of 3

D.parallel venation;

floral organs in multiples of 3net-like venation;

floral organs in multiples of 4 or 5

32. The diagram below shows part of the vascular system of a dicotyledonous plant. Which process is

indicated by the arrows?

Upper Saddle River, NJ]

A. Passive translocation in the phloem of sucrose from the sink to the source

B. Active translocation in the phloem of sucrose from the source to the sink

C. Passive translocation in the xylem of sucrose from the sink to the source

Active translocation in the xylem of sucrose from the source to the sink

33. What controls the flowering process in long-day plants? A. P fr is converted by red light to P r which acts as a promoter of flowering. B. P r is converted by red light to P fr which acts as an inhibitor of flowering. C. P r is converted by red light to P fr which acts as a promoter of flowering.

P fr is converted by red light to P r which acts as an inhibitor of flowering.

34. A test cross resulted in these recombinants:

tB Tb

tb tb

Which of the following was the parental test cross?

A.TB tb tb

B.TB tb tB

C.Tb tb tB

D.TB TB tb

35. What occurs during the blood clotting process?

A. Prothrombin is converted into thrombin which acts on fibrinogen.

B. Prothrombin is converted into thrombin which acts on fibrin.

C. Fibrinogen is converted into fibrin which acts on prothrombin.

D. Fibrinogen is converted into fibrin which acts on thrombin.

36. What is indicated by the letters X, Y and Z?

X Y Z

A.sarcomere myosin filaments actin filaments

B.sarcomere actin filaments myosin filaments

C.dark band myosin filaments actin filaments

D.dark band actin filaments myosin filaments

37. The diagram below shows some stages in the production of monoclonal antibodies. What are stages

X, Y and Z?

[Used with the permission of Access Excellence @ the National Health Museum]

A.injection of antibody isolation of B-cell fusion between B-cell and tumour cell resulting in plasma cell

B.injection of antibody isolation of T-cell fusion between T-cell and tumour cell resulting in plasma cell

C.injection of antigen isolation of T-cell fusion between T-cell and tumour cell resulting in hybridoma cell

injection of antigen

isolation of B-cell

fusion between B-cell and tumour cell resulting in hybridoma cell

Tumour cells

Tissue culture

Monoclonal antibodies isolated for cultivation

38.

In the diagram of the nephron below, what structures are indicated by the letters Y and Z?

[Source: adapted from https://www.wendangku.net/doc/9e4305803.html,/sjones/SGHL12007 files/image005.jpg]

A.glomerulus collecting duct

B.Bowman’s capsule collecting duct

C.Bowman’s capsule distal convoluted tubule

glomerulus

distal convoluted tubule