Question 1
Which cell structure contains genetic material and controls cell activities?
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Nucleus
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Cytoplasm
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Cell membrane
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Mitochondrion
Question 2
In most animal and plant cells, where does aerobic respiration release energy?
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Mitochondria
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Ribosomes
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Nucleus
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Cell wall
Question 3
Which organelle contains chlorophyll for photosynthesis?
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Chloroplast
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Mitochondrion
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Nucleus
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Vacuole
Question 4
Which plant cell structure is made of cellulose?
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Cell wall
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Cell membrane
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Cytoplasm
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Nucleus
Question 5
What is the main function of the cell membrane?
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Control substances entering and leaving
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Release energy by aerobic respiration
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Build proteins from amino acids
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Store genetic information
Question 6
Which structure is found in both animal cells and plant cells?
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Cytoplasm
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Cell wall
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Chloroplast
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Large permanent vacuole
Question 7
What is a group of similar cells working together called?
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Tissue
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System
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Organism
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Organelle
Question 8
How is the stomach best described?
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As an organ
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As a tissue
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As an organ system
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As an organelle
Question 9
The mouth, oesophagus, stomach and intestines are part of which organ system?
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Digestive system
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Respiratory system
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Circulatory system
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Nervous system
Question 10
Which statement describes diffusion?
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Particles spread from high to low concentration
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Particles move from low to high concentration
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Water crosses a partially permeable membrane
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Cells use energy to move particles
Question 11
When will oxygen diffuse into a cell?
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When its concentration is higher outside
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When its concentration is higher inside
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When concentrations are equal
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When the cell has no membrane
Question 12
What is a main function of cytoplasm?
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Site of many chemical reactions
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Storage of genetic information
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Control of substances entering the cell
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Absorption of light for photosynthesis
Question 13
What does a plant cell's permanent vacuole contain?
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Cell sap
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Chlorophyll
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Genetic material
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Cellulose fibres
Question 14
A microscope image is \(30\,\mathrm{mm}\) and the real object is \(3\,\mathrm{mm}\). What is the magnification?
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\(10\times\)
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\(0.1\times\)
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\(90\times\)
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\(27\times\)
Question 15
An eyepiece lens is \(10\times\) and an objective lens is \(40\times\). What is the total magnification?
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\(400\times\)
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\(50\times\)
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\(4\times\)
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\(4000\times\)
Question 16
Which plant tissue transports dissolved sugars around the plant?
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Phloem
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Xylem
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Epidermis
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Palisade mesophyll
Question 17
Which structure is present in plant cells but not animal cells?
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Chloroplast
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Cell membrane
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Cytoplasm
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Nucleus
Question 18
How does a flagellum help a unicellular organism?
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It enables movement
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It absorbs light
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It stores genetic material
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It builds a cell wall
Question 19
What is an organ system?
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A group of organs working together
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A group of similar cells
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A group of identical tissues
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One organ carrying out one function
Question 20
What is an organ?
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Different tissues working together
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Similar cells working together
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Different organs working together
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Structures working inside one cell
Question 21
What is the main function of a red blood cell?
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Transporting oxygen
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Destroying pathogens
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Making hormones
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Digesting food
Question 22
Why do muscle cells contain many mitochondria?
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Release energy for contraction
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Store oxygen for transport
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Make contractile protein fibres
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Carry impulses from motor neurones
Question 23
What does microscope magnification describe?
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Image size divided by actual size
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Ability to distinguish close points
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Width visible through the eyepiece
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Number of pixels in a digital image
Question 24
What is resolution in microscopy?
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Ability to distinguish two close points
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Image size divided by actual size
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Width visible through the eyepiece
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Amount of light reaching the specimen
Question 25
Which cell structure makes proteins?
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Ribosome
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Mitochondrion
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Nucleus
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Cell membrane