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Grade 10 LS 2025 Mid-year exam with marking guideline

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Grade 10 Life Sciences 2025 Mid-year exam with marking guideline. Questions are different scientific levels and degrees of difficulty. Term 1 and 2 content is included in the paper. Sections included are: Chemistry of life Cells: Basic units of Life Cell division: Mitosis Plant and animal tissues Plant organs Support and transport systems: Plants Support systems: Animals

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SECTION A

QUESTION ONE

1.1 Answer the following multiple-choice questions by choosing the most appropriate
answer. Write down only the letter of your choice. Example 1.1.11 A
1.1.1 Which of the following is a monosaccharide?

A Starch
B Cellulose
C Glucose
D Sucrose

1.1.2 What is the main function of ribosomes in a cell?

A Stores genetic information
B Synthesize proteins
C Transports materials across the cell
D Produce energy

1.1.3 In insects, the exoskeleton limits growth. What adaptation allows them to grow?

A Cell division
B Moulting
C Muscle expansion
D Internal skeleton growth

1.1.4 A student cuts a plant stem and observes that water is no longer reaching the
leaves. Which tissue is most likely damaged?

A Xylem
B Phloem
C Collenchyma
D Epidermis




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© 2025 Tutorme LS. All rights reserved.

, 1.1.5 What is the function of adipose tissue?

A Transmit nerve impulses
B Contract to produce movement
C Transport oxygen
D Store fat and insulate the body

1.1.6 Which structure is responsible for the movement of chromosomes during
mitosis?

A Mitochondria
B Spindle fibres
C Ribosomes
D Cell membrane

1.1.7 A biology student is using a compound microscope to observe a
microscopic organism. The eyepiece of the microscope has a magnification of
10x, and the objective lens being used has a magnification of 40x. The total
magnification of the organism is:

A 4x
B 40x
C 400x
D 4000x

1.1.8 A person falls and fractures their humerus. During treatment, the doctor explains
that this bone is part of the appendicular skeleton. Which of the following bones
also belongs to the appendicular skeleton?

A Sternum
B Scapula
C Vertebra
D Skull

1.1.9 A plant growing in a desert has sunken stomata and a thick cuticle. These are
adaptations to:

A Increase water absorption
B Promote leaf growth
C Enhance transpiration
D Reduce water loss
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© 2025 Tutorme LS. All rights reserved.

, 1.1.10 Which of the following best explains why plant cells can remain rigid and not
burst in pure water, while animal cells may burst?

A Plant cells have a cell wall
B Plant cells contain less water
C Animal cells lack chloroplasts
D Animal cells have more vacuoles
(10 x 2) (20)


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 Biological catalysts that speed up chemical reactions in the body.

1.2.2 Organelle that undergoes cellular respiration.

1.2.3 Specialized cells surrounding each stoma that control its opening and closing.

1.2.4 Tough, fibrous tissue that attaches muscle to bone.

1.2.5 Simple permanent tissue with thin-walled living cells that serve as packing tissue.

1.2.6 Regulates the light intensity of a microscope.

1.2.7 Ability of water to spontaneously rise up a very narrow tube.

1.2.8 Layer of cells in the leaf that contains air spaces.

1.2.9 Flexible connective tissue found in joints that cushions bones and reduces
friction.

1.2.10 Epithelial tissue found in the trachea that has hair-like projections that help move
substances across the surface
(10 x 1) (10)




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