Grade 10 Life Sciences June Paper and Memo:
Total: 150 Marks
Contents:
Biosphere to Ecosystems
Biodiversity & Classification
History of life
Chemistry of life
Cells
This is a practice paper with memorandum meant to test the student's knowledge, and will not be the same paper writt...
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 1.1.8) on your answer paper, for example 1.1.9 D.
1.1.1 Which of the following organelles is involved in transportation?
A Lysosome
B Centrosome
C Ribosome
D Golgi apparatus
1.1.2 The compound found ONLY in plant cells is…
A water.
B glucose.
C glycogen.
D cellulose.
1.1.3 All the interactions between biotic and abiotic factors in a region.
A Ecosystem
B Biome
C Environment
D Climate
1.1.4 Thabo wants to give his mom a pot with magnolias for her birthday. He
knows that magnolias need soil with good water-holding capacity and
nutrients. Which of the following should he use to fill his pot with?
A Only small soil particles alone
B Small soil particles with some added humus
C Sandy soil with some added humus
D Loamy soil with lots of gravel for drainage
1.1.5 What do we call the classification system where every organism has a dual
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Grade 10 June Paper
, name?
A Taxonomy
B Hierarchical system
C Two-domain system
D Binomial system
1.1.6 Radiometric dating is based on…
A comparison between fossils found at the same site.
B knowledge of geological time scale.
C radioactive decay principles.
D the rock layer in which the fossil was found.
1.1.7 A scientist who studies fossils is known as a/an…
A biologist.
B anthropologist.
C archaeologist.
D palaeontologist.
1.1.8 Soil and rock, forming the upper layer of the Earth’s surface is the...
A lithosphere.
B atmosphere.
C hydrosphere.
D biosphere.
(8x2=16)
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 1.2.10) in your answer
book.
1.2.1 Vitamin directly responsible for the absorption of Calcium in the body.
1.2.2 Level of classification found after phylum.
1.2.3 Those organisms that are unable to manufacture their own food.
1.2.4 Plant species whose introduction and/or spread outside their natural habitat
threaten biological diversity.
1.2.5 Death of all individuals of a species.
1.2.6 Organisms that do not have a distinct nucleus or enclosed structures.
1.2.7 The sorting and grouping of things according to similarities and differences.
1.2.8 The variety of life forms that occurs on earth.
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Grade 10 June Paper
, 1.2.9 The movement of water from a high concentration to a low concentration
into a cell through a semi-permeable membrane.
1.2.10 The monomers used to build proteins.
(10x1=10)
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 only A only, B
only, Both A and B or None, next to the QUESTION NUMBER (1.3.1 to 1.3.3) on
your answer paper.
COLUMN I COLUMN II
1.3.1 Contains genetic information A. RNA
B. DNA
1.3.2 Organic compound A. Vitamins
B. Carbohydrates
1.3.3 Dinosaur extinction A. Holocene extinction
B. Cretaceous-Tertiary
(3x2=6)
1. The table below shows a list of nutrients and food sources.
4
Nutrients Food Sources
Vitamin A ( retinol) Oranges
Vitamin B1 (thiamine) Carrots
Vitamin C (ascorbic acid) Liver
Vitamin D (calciferol) Cheese
Iodine Meat
Iron Spinach
Nitrogen Fish (sea)
Calcium
1.4.1 Name ONE nutrient and ONE food source form the list above which
will prevent each of the following disorders:
(a) Scurvy (2)
(b) Goitre (2)
(c) Beri – Beri (2)
3|Page www.summariessa.co.za Life Sciences
Grade 10 June Paper
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