O-LevelBiologyCoordination & Response5090/21 · May/June 2015 · Q49 Marks

Define the term drug.

(a)Define the term drug.[2]
(b)Fig. 4.1 shows some of the organs of a person that can be affected by the use of drugs. D lung E [Figure 4.1] Complete Table 4.1 by naming organs D and E and by giving one effect of each drug on the named organ. Table 4.1 drug organ label on Fig. 4.1 name of organ one effect of drug heroin D alcohol E[4]
(c)(i)Name two toxic components of tobacco smoke. 1 2[2]
(c)(ii)State the likely effect on her baby if a mother smokes tobacco throughout pregnancy.[1]

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Mark scheme

Marking points from the official mark scheme (May/June 2015). The mark or mark type is shown in brackets.

[max 2] externally administered ;
[max 2] substance;
[max 2] modifies/affects chemical reactions in body;
[4] brain; depressant; A named parts of brain
[4] liver; ref. damage; A named, e.g. cirrhosis/liver failure/fatty liver disease
[max 2] nicotine ;
[max 2] tar;
[max 2] carbon monoxide;
[1] reduced birth weight ; A premature birth/breathing problems

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