An exothermic chemical process that transfers energy for life processes, using glucose as fuel.

Apparatus used to measure the rate of respiration in small organisms.

The factor that we change in an experiment.

The factor that we measure in an experiment.

The effect of temperature on cellular respiration in small organisms: practical

Combined science

Aerobic cellular respiration in humans and other organisms

Anaerobic cellular respiration in humans and other organisms

Explaining the effect of temperature on the rate of cellular respiration

The effect of different substrates on cellular respiration in yeast: practical

Explaining the effect of different substrates on the rate of cellular respiration

Pupils will learn how substances essential for chemical reactions, and the products of the reactions, are transported into, around and out of plants, and about factors affecting the rate of water uptake by a plant.

Pupils learned about photosynthesis in producers, including a two-stage model of the process and the requirements and products of each stage.

This unit covers cellular respiration as an exothermic reaction in all cells, comparing aerobic and anaerobic processes. It explores cell structures and functions, enhanced by electron microscopy. Emphasis is on conducting experiments, analysing data, and interpreting results.

Aerobic and anaerobic cellular respiration

Physical activity and equipment requiring safe use

Look at the unbalanced equation for aerobic respiration. Which number in front of the CO$$_2$$ and H$$_2$$O would balance the equation?

Chemical reactions are all affected by temperature.

Organisms can die if they get too cold or too hot.

Cellular respiration is catalysed by enzymes.

The rate of cellular respiration is affected by temperature. Which is the best explanation for this?

to absorb carbon dioxide from cellular respiration

to absorb oxygen from cellular respiration

to provide oxygen for cellular respiration

to provide carbon dioxide for cellular respiration

The diagram shows part of the apparatus used in the investigation. What is the function of the soda lime?

An exothermic reaction transfers heat to the environment.

An exothermic reaction absorbs heat from the environment.

To start the reaction, it needs to be cooled.

The water bath in the apparatus is needed to keep the temperature constant because respiration is an exothermic reaction. Which statement about exothermic reactions is correct?

Wait for the organisms to adjust to the temperature.

Mark the starting positions of the coloured liquid in the capillary tubes.

After 5 minutes measure the distance moved by the liquid in each capillary tube.

The apparatus shown can be used to measure the effect of temperature on the rate of respiration. The steps of the method to use this apparatus are in the wrong order.

chemical process that transfers energy from glucose for life processes

the variable being tested or measured during an experiment

the variable that is altered during an experiment

apparatus used to measure the rate of respiration

Match the words to their correct meaning.

Where does anaeroboc respiration take place?

Respiration occurs continuously in the cells of every living organism. The energy transferred is needed for life processes. Which life process does **not** need energy transferred from respiration?

Whhat are the reactants in aerobic cellular respiration?

What is the product of anaerobic cellular respiration in animal cells?

Which two words complete this sentence? Anaerobic cellular respiration is a __________ process, so is a __________ way to transfer energy.

We make use of fermentation in yeast to make some foods and drinks. Which product of fermentation causes bread to rise?

Exit Quiz

Look at the unbalanced equation for aerobic respiration. Which number in front of the CO$$_2$$ and H$$_2$$O would balance the equation?