CIE Biology Paper-5: Specimen Questions 21 - 23 of 62

Question number: 21

Essay Question▾

Describe in Detail

Using the data in given draw a line graph to show the effect of pH on the time taken for the digestion of protein on the photographic film. Explain the effect of pH on the activity of the enzymes.

Image shows effect of pH on the time taken for the digestion of protein

Table shows data in different pH and time taken for protein to be digested

pH

time taken for protein to be digested/mins

2

13

6

10

7

1

9

3

12

4

showing a given graph.

showing a given graph.

here given table is represent a graph

Explanation

Here is the graph:

Enzyme mainly affected when pH goes change.

Enzyme mainly affected when pH goes change.

The point when enzymes are most active is called as optimum pH.

shows the relation between reaction velocity at Various pHlevel

shows the relation between reaction velocity at Various pHlevel

In given diagram graph is plotted reaction velocity against pH

Question number: 22

Essay Question▾

Describe in Detail

Figure shows a bone. Name it and what is the main function of this bone.

Figure showing a bone

Figure showing a bone

Figure shows a bone (human being) Identify it

Explanation

Humerus (the upper arm)

It is a long bone that is useful for the movement and support of the arm

Question number: 23

Essay Question▾

Describe in Detail

In picture there is a T. S of sunflower leaf. Label it.

Image shows T.S of sunflower leaf.

Image shows T. S of sunflower leaf.

Image shows T. S of sunflower leaf. Label it

Explanation

Labelled TS of Sunflower leaf

Image shows T.S of sunflower leaf(labeled diagram)

Image shows T. S of sunflower leaf (labeled diagram)

Image shows T. S of sunflower leaf.

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