Biology Year 9 End of Term Test Revision Set

Where does protein synthesis occur in a cell?

Ribosome

How many cells do unicellular organisms have?

One

Does a prokaryotic cell have a nucleus?

No

Does a eukaryotic cell have a nucleus?

Yes

Is a prokaryotic cell unicellular or multicellular?

Unicellular

Is a eukaryotic cell unicellular or multicellular?

Multicellular

What does the nucleus do?

Controls the activity of the cell

What does the cell membrane do?

Controls what enters and leaves the cell

What does a cell wall do?

Protects the cell

Where does respiration occur in a cell?

Mitochondria

What does the vacuole in a cell do?

Keeps the cell turgid

What does the chloroplast MAKE in a cell?

Proteins

In what part of a cell do most chemical reactions occur?

Cytoplasm

Define resolution for a microscope

The ability to distinguish two points which are close together

Define magnification for a microscope

The ability to make something appear larger

What type of cells are bacteria?

Prokaryotic

What is a specialised cell?

A cell that performs a specific function

What are stem cells?

Unspecialised cells that can turn into other cell types

True or false - We need new cells to repair tissues

True

True or false - We need new cells to make us be able to digest food

False

What is the main reason that we need new cells?

Growth and repair

What is a chromosome?

A small particle of DNA found within a coil

Are chromosomes arranged singly or in pairs?

In pairs

What is diffusion?

The movement of particles from an area of high concentration to an area of low concentration

True or false - Diffusion can happen in a solution or in a gas

True

True or false - Diffusion can happen in a solid

False

What is one adaptation of the root hair cell which allows it to take in nutrients?

Large surface area

What is an organ system?

A group of organs

What is an example of an organ system?

The circulatory system

True or false - enzymes can adapt

True

Does an enzyme have a specific shape?

Yes

What are the main things affecting enzymes?

PH and temperature

What are the two types of digestion?

Mechanical and chemical

What can the body turn food into?

Nutrients

Where is bile stored?

The gallbladder

Define transpiration

The exhalation of water vapour in a plant through the stomata

Where is water vapour exhaled in a plant?

Stomata

Define pathogen

A microorganism that causes disease

Define osmosis

The movement of molecules from an area of higher concentration to an area of lower concentration

Define active transport

The movement of energy from an area of lower concentration to an area of higher concentration through a partially permeable membrane with a high concentration gradient