GCSE Combined Science Core Facts

The basic unit of life is the ____.

• atom
• tissue
• cell
• organ

Which structure holds genetic material in eukaryotic cells?

• Cell wall
• Vacuole
• Ribosome
• Nucleus

Prokaryotic cells lack a true nucleus.

• True
• False

Which pigment in chloroplasts is used in photosynthesis?

• Cellulose
• Plasmid
• Chlorophyll
• Cytoplasm

Where does aerobic respiration take place?

• Vacuole
• Nucleus
• Mitochondria
• Ribosomes

____ is the diffusion of water across a partially permeable membrane.

• Osmosis
• Diffusion
• Combustion
• Active transport

Active transport moves substances with a concentration gradient and needs no energy.

• True
• False

What charge do protons carry?

• Variable
• Positive
• Negative
• Neutral

The ____ number equals the number of protons.

• molar
• charge
• atomic
• mass

Neutralisation forms water and a ____.

• Metal
• Salt
• Fuel
• Gas

What is the pH of pure water?

• 0
• 1
• 14
• 7

A catalyst speeds up a reaction without being used up.

• True
• False

____ reactions release energy to the surroundings.

• Endothermic
• Exothermic
• Neutral
• Reversible

In what unit is force measured?

• Newtons
• Kilograms
• Joules
• Watts

Gravity is a contact force.

• True
• False