Digestive System & Biological Molecules - exam practice
Digestive System & Biological Molecules
Question 1 of 4
There are numerous digestive substances that help break down food into smaller molecules that can be absorbed into the bloodstream.
What do we call substances like amylase and protease which speed up chemical reactions?
Describe how to use a test to determine if the breakdown of starch has taken place in a sample of food.
The table below shows the nutritional information of hot dogs made from pork and a plant-based alternative, made from soya.
Evaluate the use of hot dogs made from pork compared with the plant-based hot dogs in providing customers with a healthy, balanced diet.
Use information from the table and your own knowledge to answer the question.
Adults should consume around 1 gram of protein per kilogram of body mass.
Examples of foods that contain protein are meat, fish, eggs, nuts, and cheese.
Describe how you would test a sample of food to show it contains protein.
Describe at least one safety precaution you would take during this test.
A student tested foods for different biological molecules.
His results were recorded in the following table.
Suggest why the student recorded one of the results with a question mark.
Which of these statements are correct about the composition of cheese?
The student is worried that the results for apple juice and vegetable oil have been swapped.
Give two reasons why this is not possible.