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 structure in plant cells is made of cellulose and helps support the cell?
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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
Which sequence shows levels of organisation from smallest to largest?
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\(\text{Cell} \to \text{tissue} \to \text{organ} \to \text{organ system} \to \text{organism}\)
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\(\text{Tissue} \to \text{cell} \to \text{organ} \to \text{organism} \to \text{organ system}\)
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\(\text{Cell} \to \text{organ} \to \text{tissue} \to \text{organ system} \to \text{organism}\)
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\(\text{Organism} \to \text{organ system} \to \text{organ} \to \text{tissue} \to \text{cell}\)
Question 8
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 9
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 10
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 11
What adaptation helps a root hair cell absorb water effectively?
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A long projection that increases surface area
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A thick waxy outer layer
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A thick cell wall that blocks water uptake
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A high number of chloroplasts
Question 12
Why does a sperm cell contain many mitochondria?
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Release energy for tail movement
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Digest the egg's outer layer
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Carry half the chromosomes
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Detect chemicals released by the egg
Question 13
Which statement about mature human red blood cells is correct?
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They have no nucleus
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They contain chloroplasts
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They have a thick cellulose wall
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They are larger than most white blood cells
Question 14
What is diffusion?
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The net movement of particles from a high concentration to a low concentration
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The movement of water from a dilute solution to a concentrated solution
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The movement of particles from a low concentration to a high concentration using energy
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The breaking down of food using enzymes
Question 15
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 16
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 17
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 18
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 19
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 20
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 21
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 22
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 23
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 24
What is a specialised cell?
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A cell adapted for a particular function
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A group of similar cells working together
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A cell able to develop into many cell types
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A structure performing one task inside a cell
Question 25
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 26
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 27
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 28
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 29
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 30
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