Biology Hl Paper 2007

1359 words - 6 pages

1 hour



BIOLOGY HIGHER LEVEL PAPER 1 Thursday 9 May 2002 (afternoon)

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.


18 pages

–2– 1. Which processes occur during interphase? I. II. III. A. B. C. D. DNA replication DNA transcription Separation of replicated DNA molecules


I and II only I and III only II and III only I, II and III


What is the ratio of the ...view middle of the document...


Which response summarises meiosis?

Pairing of chromosomes

Number of divisions


A. B. C. D.

No No Yes Yes

One Two One Two

Two diploid cells Four diploid cells Two haploid cells Four haploid cells


A healthy couple have a daughter who has a rare disease caused by a recessive mutation of a gene. They then have two healthy children. What is the probability that a fourth child will have the same rare disease? A. B. C. D. 0.00 0.25 0.50 0.75


What is a clone? A. B. C. D. A group of organisms which could interbreed and produce fertile offspring. A group of cells descended from two parent cells. A group of organisms of the same species living together and interbreeding. A group of organisms with identical genotype.


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The diagram below shows a food web. Which organisms in the food web are only primary consumers? P S T R U A. B. C. D. P and S Q and R T and U R and T Q


Which graph shows the effect of temperature on the rate of photosynthesis? A. Rate B. Rate

Temperature C. Rate D. Rate







Which characteristics apply to all evolving populations? I. II. III. A. B. C. D. Overproduction of offspring Different genotypes in the population Different chances of survival

I and II only I and III only II and III only I, II and III


The data below shows the height of two populations of bean seedlings.
Height of Population I / cm Height of Population II / cm

10 11 12 13 13 14 15 16 17
x = 13.4 s = 2.3

8 9 9 10 10 10 14 15 16
x = 11.2 s = 2.9

Which conclusion is supported by the data? A. B. C. D. The median values are 13.4 for I and 11.2 for II. The median and the mode values for II are the same. 95 % of the values in I are within 2.3 cm of the mean. The variability in height is greater for I than for II.


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Which products are formed by the action of the enzymes listed?
Protease Amylase

A. B. C. D.

Amino acids Dipeptides Proteins Polypeptides

Maltose Disaccharides Starch Glucose


What are the states of the valves when the ventricles are relaxed?
Atrio-ventricular valves Semilunar valves in the arteries

A. B. C. D.

Open Open Closed Closed

Open Closed Open Closed


Where are the chemoreceptors that detect the changes in blood pH and levels of glucose found?
Changes in blood pH Changes in blood glucose

A. B. C. D.

Brain stem Carotid vein Carotid artery Venae cavae


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