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BiologySECMay2023.pdf
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Index Number:___________ SEC04/1.23mMATRICULATION AND SECONDARY EDUCATION CERTIFICATE
EXAMINATIONS BOARD
SECONDARY EDUCATION CERTIFICATE LEVEL
2023 MAIN SESSION
SUBJECT: Biology
PAPER NUMBER: I
DATE: 8th May 2023
TIME: 9:00 a.m. to 11:05 a.m.
Directions to candidates
• Write your index number in the space at the top left-hand corner of this page.
• Answer ALL questions. Write all your answers in the spaces provided.
• The mark allocation is indicated at the end of each question. Marks allocated to parts of
questions are also indicated in brackets.
• You are reminded of the necessity for orderly presentation in your answers.
• The use of electronic calculators is permitted.
For examiners’ use only:
Question 1 2 3 4 5 6 7 8 9 10 Total
Score
Maximum 11 10 11 8 10 10 10 10 10 10 100
© The MATSEC Examinations Board reserves all rights on the examination questions in all examination papers set by the said Board.
,SEC04/1.23m
DO NOT WRITE ABOVE THIS LINE
1. a. This question is about bacteria and viruses. From the list below, choose the most
appropriate term to fill in the blanks.
binary fission decomposing nitrogen fixing host
prokaryotes protein coat reproduce single-celled
Bacteria and viruses may not be visible with the human eye, but they are all around us in
staggering numbers. Bacteria are ____________________ i.e. made up of simple cells,
with free floating genetic material. A virus is not a living organism and can only grow and
________________ in the cells of a ______________. Viruses are not cellular.
Bacteria, by contrast, are ___________________ organisms that produce their own energy
and can reproduce on their own. While both can cause disease, bacteria also serve other
vital roles in nature. Many bacteria living in the human gut, help in digestion of food and
absorption of the products formed, _______________________ and __________________
organic material in soil. Bacteria reproduce mainly by __________________ .
Viruses are an assembly of different types of molecules that consist of genetic material with
a _______________________ and, sometimes enveloped with a layer of fat too. (4)
b. The table below shows some characteristics of plants and fungi. Fill in the missing
characteristics.
Characteristic Plants Fungi
Reproduction Some reproduce by seeds None reproduce by seeds
Main carbohydrate stored Glycogen
Cell wall is made up of Cellulose
Structure of organism Mycelium and hyphae
(3)
Page 2 of 16
,SEC04/1.23m
DO NOT WRITE ABOVE THIS LINE
c. In the table below, list TWO differences and TWO similarities between a plant-like
protist and an animal-like protist.
Plant-like protist Animal-like protist
E.g. Euglena E.g. Amoeba
(Source: https://as1.ftcdn.net/v2/jpg)
Differences
i)
ii)
Similarities
i)
ii)
(2,2)
(Total: 11 marks)
Please turn the page.
Page 3 of 16
, SEC04/1.23m
DO NOT WRITE ABOVE THIS LINE
2. a. Figure 2.1 below shows two plants which have flowers that resemble human organs.
Lamprocapnos spectabilis Celosia argentea var. cristata
Figure 2.1: Heart shaped and brain shaped flowers
(Source: Lamprocapnos spectabilis https://www.deviantart.com/finnisterre/
Celosia argentea https://www.pinterest.com/pin/)
i) Both plants have broad leaves with a network of veins. Use this information to
deduce whether these flowering plants are dicots or monocots.
_________________________________________________________________________ (1)
ii) Based on your answer to part a i), predict the number of petals expected in each
flower.
_________________________________________________________________________ (1)
b. Dawsonia superba is the tallest moss on Earth. Under optimum conditions it can grow up
to 50 cm. It is found in certain regions of New Zealand and Australia.
i) Describe the habitat of this plant.
_________________________________________________________________________ (1)
ii) Explain why it is unusual that mosses grow to such heights.
_____________________________________________________________________________
_________________________________________________________________________ (2)
iii) The leaves of mosses have a primitive type of cuticle. Explain the importance of the
cuticle in leaves.
_____________________________________________________________________________
_________________________________________________________________________ (2)
Page 4 of 16
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