Practice Examination

2020

___________________________________________________________

Student Class/
Name Section

Biology (XI) 5090/62

Paper 6 ATP 1 Hour
Max. Marks: 40
Candidates answer on the Question Paper.
No Additional Materials are required
______________________________________________________________________________

READ THESE INSTRUCTIONS FIRST

Write your Name, Class, Section and Date.

Write in dark blue or black pen.
You may use a pencil for any diagrams, graphs or rough working.
Do not use staples, paper clips, highlighters, glue or correction fluid.

Answer all questions.

At the end of the examination, fasten all your work securely together.
The number of marks is given in brackets [ ] at the end of each question or part question.
Electronic calculators may be used.

Signature of the Invigilator: Signature of the Examiner:

____________________________________________________________________________

This document consists of 9 printed pages including the top sheet.

[Turn over
 2

1. Using paper and plasticine to represent a wind dispersed fruit, such as Acer, it is

possible to adjust the size of the wing. The effect of different wing size was investigated

by dropping a model fruit with different surface areas, from the same height in the same

wind conditions. The horizontal distance travelled by the model was measured. Each

model fruit was dropped five times.

The results are shown below.

a. Complete the table by calculating the mean (average) distance travelled by the

model fruits. (2)

b. Plot the mean distance the model fruit travelled against the surface

area of the model fruit as a line graph. (4)

Practice Exam XI Biology 5092/62

 3

c. Describe the relationship between the surface area and the mean distance

travelled. (2)

...........................................................................................................................................

............................................................................................................................................

d. Outline the importance of seed dispersal away from the parent plant. (2)

..............................................................................................................................................

..............................................................................................................................................

..........................................................................................................................................

[Total 10]

Practice Exam XI Biology 5092/62

 4

2. As the heart pumps blood around the human body, a pulse may be felt at certain sites, such

as the one shown in the figure given below.

a. Label, on the figure given below, one other site where a pulse may be felt. (1)

Practice Exam XI Biology 5092/62

 5

b. Suggest why it is possible to feel the pulse at these sites (2)

.........................................................................................................................................................

.........................................................................................................................................................

A student counted the number of pulses felt in 15 seconds at the site shown on their wrist. The

student did this three times.

The results are recorded in the table given below.

c(i). Complete the right hand column in the table to show the number of pulses per minute for

each count [3]

c(ii)Calculate the mean pulses per minute. [2]

d. Explain why it is advisable to repeat readings at least three times. (2)

.........................................................................................................................................................

.........................................................................................................................................................

.........................................................................................................................................................

e . State two factors that may affect heart rate. [2]

.........................................................................................................................................................

.........................................................................................................................................................

........................................................................................................................................................

[Total 12]

Practice Exam XI Biology 5092/62

 6

[5]

Practice Exam XI Biology 5092/62

 7

[2]

(i) Determine the length of one starch grain in mm, given that the cells are magnified
860 times.

Show your working.

Length of starch grain ……………………. [2]

Practice Exam XI Biology 5092/62

 8

(ii) Name the metabolic process by which plants make carbohydrates.

………………………………………………………………………………… [1]

(c) Fig. 3.2 shows a plant that is able to grow in soil that is short of nitrates, because it can
produce protein in an unusual way

• The leaves attract insects.

• The insects become stuck to the leaves.

• Secretion of enzymes takes place from glands on the leaf.

Suggest how this plant produces protein from the trapped insects.

................................................................................................................................................

................................................................................................................................................

...............................................................................................................................................

.............................................................................................................................................. [3]

(d) (i) State how nitrates are of benefit to green plants.

..............................................................................................................................................

..............................................................................................................................................

.............................................................................................................................................. [2]

Practice Exam XI Biology 5092/62

 9

(ii) Using apparatus like that shown in Fig. 3.3, outline how you could show the effect of nitrates
on plant growth

.........................................................................................................................................................

.........................................................................................................................................................

.........................................................................................................................................................

.........................................................................................................................................................

.........................................................................................................................................................

.....................................................................................................................................................[4]

[Total 18]

Practice Exam XI Biology 5092/62