biology pastpaper igcse summer 3 years ago

 biology pastpaper igcse summer 2007

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UNIVERSITY OF CAMBRIDGE FOREIGN EXAMINATIONS

General Certificate of Education

Advanced Subsidiary Level and Advanced Level

*8210040505*

9700/02

BIOLOGY

Paper a couple of Structured Concerns AS

October/November 2007

one hour 15 minutes

Applicants answer on the Question Paper.

No Further Materials are essential.

READ THESE INSTRUCTIONS INITIAL

Write your Centre quantity, candidate quantity and term in the areas provided near the top of this page. Write in dark blue or black dog pen.

You may use a soft pen for any layouts, graphs or rough working. Do not make use of staples, conventional paper clips, highlighters, glue or perhaps correction liquid. DO NOT WRITE ON ANY BARCODES.

Response all questions.

At the conclusion of the evaluation, fasten all of your work securely together. The number of marks has in conference [ ] at the end of every question or perhaps part question.

For Examiner's Use

one particular

2

a few

4

a few

6

Total

This file consists of 13 printed web pages and a few blank webpages. SP (NF/CGW) T26890/4

В© UCLES 2007

[Turn over

two

Answer all the questions.

1

Fig. 1 . 1 shows a bacterial cellular dividing by binary transmutation.

magnification = x thirty seven 500

Fig. 1 . you

В© UCLES 2007

9700/02/O/N/07

For

Examiner's

Use

a few

(a) With regards to Fig. 1 . 1, point out three strength features of prokaryotic cells which are not shown simply by eukaryotic cellular material.

For

Examiner's

Use

1 )...................................................................................................................................... 2 ....................................................................................................................................... 3...................................................................................................................................[3] (b) Grow cells split by mitosis, not simply by binary transmutation.

(i)

Express three roles of mitosis in vegetation.

1 ............................................................................................................................... 2 ............................................................................................................................... 3...........................................................................................................................[3]

(ii)

Explain so why cells that are produced as a result of mitosis are genetically identical.........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................[3] [Total: 9]

В© UCLES 2007

9700/02/O/N/07

[Turn more than

4

2

Scientists are suffering from a variety of strategies to represent the three dimensional composition of healthy proteins. Fig. 2 . 1 reveals one way of which represents the framework of the proteins, haemoglobin.

A

Fig. 2 . 1

(a) (i)

Identity A and state its role.

term........................................................................................................................ role................................................................................................................................................................................................................................................................

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