Quiz about AT IG6Sci

Question 1

Which part of a cell contains genetic material and controls the cell's activities?

Accepted Answer

Nucleus

Answer

Cell wall

Answer

Chloroplast

Answer

Mitochondrion

Question 2

Which structure is found in plant cells but not in animal cells?

Accepted Answer

Chloroplast

Answer

Cell membrane

Answer

Nucleus

Answer

Ribosome

Question 3

What is the function of chloroplasts?

Accepted Answer

Make food by photosynthesis

Answer

Store water

Answer

Control cell activities

Answer

Provide support

Question 4

What is the name of the rigid layer that surrounds plant cells?

Accepted Answer

Cell wall

Answer

Cell membrane

Answer

Vacuole

Answer

Cytoplasm

Question 5

Which cell part controls what goes in and out of the cell?

Accepted Answer

Cell membrane

Answer

Nucleus

Answer

Cytoplasm

Answer

Mitochondrion

Question 6

Which organelle is the site of respiration in a cell?

Accepted Answer

Mitochondrion

Answer

Chloroplast

Answer

Nucleus

Answer

Vacuole

Question 7

What fluid-like substance fills the inside of a cell?

Accepted Answer

Cytoplasm

Answer

Cell wall

Answer

Nucleus

Answer

Vacuole

Question 8

Which structure stores materials and sometimes waste in plant cells?

Accepted Answer

Vacuole

Answer

Mitochondrion

Answer

Ribosome

Answer

Cell membrane

Question 9

What is the smallest unit of life?

Accepted Answer

Molecule

Answer

Atom

Question 10

Which of these is an example of a specialised cell?

Accepted Answer

D All of the above

Answer

A Blood cell

Answer

B Bone cell

Answer

C Nerve cell

Question 11

Which feature helps root hair cells absorb more water?

Accepted Answer

Thin cell wall and large surface area

Answer

Chloroplasts

Answer

Large vacuole

Answer

Cell membrane

Question 12

Which microscope type is commonly used in schools to view cells?

Accepted Answer

Compound light microscope

Answer

Electron microscope

Answer

Scanning probe microscope

Answer

X-ray microscope

Question 13

What is the advantage of staining cells before viewing under a microscope?

Accepted Answer

Makes structures visible by increasing contrast

Answer

Makes cells smaller

Answer

Kills the cells

Answer

Increases magnification

Question 14

Which unit is used to measure cells and microscopic structures?

Accepted Answer

Micrometres (microns)

Answer

Meters

Answer

Centimetres

Answer

Millimetres

Question 15

What happens to cells when they are placed in pure water (plant cells)?

Accepted Answer

Become turgid

Answer

Shrink

Answer

Undergo plasmolysis

Answer

Burst immediately

Question 16

Which organ system includes the brain and spinal cord?

Accepted Answer

Nervous system

Answer

Circulatory system

Answer

Respiratory system

Answer

Digestive system

Question 17

Which of the following is NOT a level of organisation in biology?

Accepted Answer

Atom

Answer

Cell

Answer

Tissue

Answer

Organ

Question 18

What is the basic difference between plant and bacterial cells?

Accepted Answer

Bacterial cells lack a nucleus (prokaryotic)

Answer

Bacteria have a nucleus

Answer

Plant cells lack cell walls

Answer

Plant cells are smaller than bacteria

Question 19

Which process describes movement of water through a selectively permeable membrane?

Accepted Answer

Osmosis

Answer

Diffusion

Answer

Active transport

Answer

Transpiration

Question 20

Which part of the cell contains chlorophyll?

Accepted Answer

Chloroplast

Answer

Vacuole

Answer

Nucleus

Answer

Cell wall

Question 21

Which structure helps keep the shape of animal cells?

Accepted Answer

Cytoskeleton

Answer

Cell wall

Answer

Chloroplasts

Answer

Vacuole

Question 22

Which statement about cells is true?

Accepted Answer

All living organisms are made of cells

Answer

All cells have chloroplasts

Answer

Cells are made of tissues

Answer

Cells cannot be seen with any microscope

Question 23

What organelle synthesises proteins?

Accepted Answer

Ribosome

Answer

Mitochondrion

Answer

Lysosome

Answer

Vacuole

Question 24

Which specialised cell contains haemoglobin?

Accepted Answer

Red blood cell

Answer

Nerve cell

Answer

Muscle cell

Answer

Skin cell

Question 25

29. Which structure is responsible for photosynthesis?

Accepted Answer

Chloroplast

Answer

Mitochondria

Answer

Nucleus

Answer

Ribosome

Question 26

How do substances move from high to low concentration without energy?

Accepted Answer

Diffusion

Answer

Active transport

Answer

Osmosis

Answer

Endocytosis

Question 27

Which term describes organisms made of many cells?

Accepted Answer

Multicellular

Answer

Unicellular

Answer

Acellular

Answer

Prokaryotic

Question 28

What is a tissue?

Accepted Answer

Group of similar cells working together

Answer

A single cell

Answer

An organelle

Answer

A molecule

Question 29

Which part of the microscope adjusts the amount of light passing through the slide?

Accepted Answer

Diaphragm (iris)

Answer

Objective lens

Answer

Eyepiece

Answer

Stage

Question 30

Which objective lens gives the highest magnification on a standard school microscope?

Accepted Answer

High-power (oil immersion sometimes higher)

Answer

Low-power

Answer

Medium-power

Answer

Scanning lens

Question 31

Which organelle helps break down waste and old organelles?

Accepted Answer

Lysosome

Answer

Ribosome

Answer

Nucleus

Answer

Chloroplast

Question 32

Which process releases energy from glucose in cells?

Accepted Answer

Respiration

Answer

Photosynthesis

Answer

Fermentation only in plants

Answer

Diffusion

Question 33

Which instrument is used to measure sizes of cells in micrometres on microscope slides?

Accepted Answer

Eyepiece graticule or stage micrometer

Answer

Ruler

Answer

Thermometer

Answer

Caliper

Question 34

Which term describes the movement of particles from an area of low concentration to high concentration using energy?

Accepted Answer

Active transport

Answer

Diffusion

Answer

Osmosis

Answer

Passive transport

Question 35

Which cell structure stores genetic information?

Accepted Answer

Nucleus

Answer

Mitochondrion

Answer

Cell membrane

Answer

Chloroplast

Question 36

Which feature is common to all living things?

Accepted Answer

They are made of cells

Answer

They can photosynthesise

Answer

They are multicellular

Answer

They have cell walls

Question 37

Which type of cell is likely to have many mitochondria?

Accepted Answer

Muscle cell

Answer

Red blood cell

Answer

Skin cell

Answer

Root hair cell

Question 38

What name is given to a single-celled organism like Amoeba?

Accepted Answer

Unicellular organism

Answer

Multicellular organism

Answer

Tissue

Answer

Organ

Question 39

Which component of blood helps fight infections?

Accepted Answer

White blood cells

Answer

Red blood cells

Answer

Plasma

Answer

Platelets

Question 40

What is the function of the cell membrane?

Accepted Answer

Controls movement of substances in and out

Answer

Provides rigid support

Answer

Contains chlorophyll

Answer

Produces energy

Question 41

Which of the following is a pure substance made of only one type of atom?

Accepted Answer

Element

Answer

Compound

Answer

Mixture

Answer

Solution

Question 42

What is an atom?

Accepted Answer

The smallest unit of an element

Answer

A particle made of many cells

Answer

A type of molecule only in compounds

Answer

A charged particle only

Question 43

Which is a mixture?

Accepted Answer

Air

Answer

Salt (NaCl)

Answer

Pure water (H2O)

Answer

Gold (Au)

Question 44

What is the chemical symbol for sodium?

Accepted Answer

Na

Answer

S

Answer

So

Answer

Sd

Question 45

Which substance is a molecule of two or more different elements chemically joined?

Accepted Answer

Compound

Answer

Element

Answer

Mixture

Answer

Alloy

Question 46

Which state of matter has a definite volume but no definite shape?

Accepted Answer

Liquid

Answer

Solid

Answer

Gas

Answer

Plasma

Question 47

Which statement about solids is true?

Accepted Answer

Particles are closely packed and vibrate in place

Answer

Particles are far apart and move freely

Answer

Solids have no definite shape

Answer

Solids are highly compressible

Question 48

What causes diffusion in gases and liquids?

Accepted Answer

Movement of particles from high to low concentration

Answer

Chemical reactions

Answer

Gravity

Answer

Magnetic forces

Question 49

Which material property describes how well a material resists scratching?

Accepted Answer

Hardness

Answer

Density

Answer

Elasticity

Answer

Conductivity

Question 50

Which material is a good electrical conductor?

Accepted Answer

Copper

Answer

Rubber

Answer

Plastic

Answer

Glass

Question 51

Which of these is a thermal insulator?

Accepted Answer

Wood

Answer

Metal

Answer

Copper

Answer

Aluminium

Question 52

What is meant by the density of a substance?

Accepted Answer

Mass per unit volume

Answer

Volume per unit mass

Answer

Total mass only

Answer

Weight per unit area

Question 53

What happens to the particles when a solid melts to a liquid?

Accepted Answer

They move faster and can slide past each other

Answer

They become more closely packed

Answer

They stop moving

Question 54

Which process changes a gas directly into a solid?

Accepted Answer

Deposition (or desublimation)

Answer

Evaporation

Answer

Melting

Answer

Condensation

Question 55

An alloy is best described as:

Accepted Answer

A mixture of metals

Answer

A pure element

Answer

A compound

Answer

A gas mixture

Question 56

Which property is important for materials used to make springs?

Accepted Answer

Elasticity

Answer

Hardness

Answer

Density

Answer

Conductivity

Question 57

Which term describes how a material returns to its original shape after being stretched?

Accepted Answer

Elasticity

Answer

Plasticity

Answer

Viscosity

Answer

Brittleness

Question 58

Which material would be suitable for making a window that must let light through?

Accepted Answer

Glass

Answer

Steel

Answer

Wood

Answer

Copper

Question 59

Which of these changes is physical and not chemical?

Accepted Answer

Melting ice

Answer

Burning wood

Answer

Rusting iron

Answer

Digestion of food

Question 60

Which bond holds atoms together within a molecule?

Accepted Answer

Chemical bond

Answer

Cell bond

Answer

Magnetic bond

Answer

Ionic lock

Question 61

Which of the following is an example of a chemical change?

Accepted Answer

Burning paper

Answer

Melting butter

Answer

Dissolving sugar in water

Answer

Cutting paper

Question 62

What is a solution?

Accepted Answer

A homogeneous mixture of solute dissolved in solvent

Answer

A pure element

Answer

A suspension

Answer

A compound

Question 63

Which factor does NOT affect rate of diffusion?

Accepted Answer

Concentration gradient

Answer

Temperature

Question 64

Which term describes materials that allow electric current to flow easily?

Accepted Answer

A Conductors

Answer

B Insulators

Answer

C Semi-solids

Answer

D Plastics

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