WEST BANK HIGH SCHOOL
GRADE 11
LIFE SCIENCES
INFORMAL TEST 1
27 FEBRUARY 2024
MARKS: 50
EXAMINER: MS. SERFONTEIN
TIME: 45 MINUTES
MODERATOR: MR. HAYWOOD
This question paper consists of 6 pages
2
INSTRUCTIONS AND INFORMATION
1.
Answer ALL the questions
2.
Number the answers correctly according to the numbering system used in this
question paper.
3.
Present your answers according to the instructions of each question.
4.
Do ALL drawings in pencil and label them in black or blue ink.
5.
Draw diagrams or flow charts only when asked to do so.
6.
The diagrams in this question paper are NOT necessarily drawn to scale.
7.
Write neatly and legibly.
3
SECTION A
QUESTION 1
1.1.
Various options are provided as possible answers to the following questions.
Choose the correct answer and write only the letter (A to D) next to the question
number (1.1.1 to 1.1.4) on your LINE PAPER, e.g. 1.1.5 A
1.1.1. A cell division associated with growth in an organism is called ...
A. asexual reproduction.
B. budding.
C. meiosis.
D. mitosis.
(2)
1.1.2. The following is NOT the role of mitosis:
A. replacement of cells
B. repair of worn out tissues
C. growth
D. reduction of chromosome number
(2)
1.1.3. Phase where Chromosomes are arranged in the equator:
A. Metaphase
B. Anaphase
C. Interphase
D. Prophase
(2)
1.1.4. Each cell produced by mitosis will have ……
A. half the number of chromosomes.
B. a full set of chromosomes.
C. twice the number of chromosomes.
D. two nucleic acids.
(2)
(8)
4
1.2. Give the correct biological term for each of the following descriptions.
Write only the term next to the question number (1.2.1 to 1.2.3).
1.2.1. The structure that connects two chromosomes together during cell division.
1.2.2. The structure in a nucleus of a cell made up of two chromatids.
1.2.3. The division of cell’s cytoplasm, as opposed to its nucleus
(3)
1.3. Indicate whether each of the statements in COLUMN I applies to A ONLY,
B ONLY, BOTH A and B, or NONE of the items in COLUMN II. Write A
only, B only, Both A and B, or NONE.
COLUMN I
1.3.1. Cell division where sister chromatids have
the same chromosome number with the
COLUMN II
A. Cytokinesis
B. Meiosis
parent cell
1.3.2. In prophase the centromere forms the
spindle fibres
A. Plant cell
B. Animal cell
(2x2)
(4)
TOTAL QUESTION 1: 15
5
SECTION B
QUESTION 2
2.1
Define mitosis
(2)
2.2
Tabulate TWO differences between telophase in plant and animal cells
(5)
2.3
Provide TWO roles of mitosis.
(2)
2.4
The diagrams below show four stages of a cell undergoing
mitosis.Study the diagrams and answer the questions that
follow:
2.4.1 Give the NUMBERS of the diagrams in the correct order in which
they occur in this process.
2.4.2
(2)
(a) Name the stage of mitosis visible in DIAGRAM 2.
(1)
(b) Explain what occurs in this stage.
(2)
2.4.3 How many chromosomes will be present in each of the daughter cells shown
above after the process is complete?
2.4.4 Draw the phase that follows the one in diagram 4 above.
(2)
(4)
(20)
6
QUESTION 3
A survey was carried out at a local clinic. The findings of the survey detailing the
breast cancer and skin cancer content of the women’s different age groups and the
women’s names are given in the table below.
Women’s
names
Ann
Lisa
Nomsa
Age groups
35
45
50
Breast cancer
Skin cancer
25%
45%
60%
65%
20%
15%
3.1
Provide a hypothesis for the above investigation.
(2)
3.2
State the independent and dependent variables.
(2)
3.3
On the same system of axes, draw a bar graph to indicate the breast cancer
and skin cancer content of the women different age groups.
(6)
3.4
Give TWO names of women with most skin and breast cancers.
(2)
3.5
Supply reasons for your answer in 3.4 above.
(2)
3.6
Who has the moderate chance of getting both cancers?
(1)
QUESTION 3: 15
GRAND TOTAL: 50