Levels Of Organisation And Food Tests

Question 1

What is an organelle and an example?

Answer 1

A subcellular structure. E.g nucleus, ribosomes

Question 2

What is a cell and an example?

Answer 2

Smallest part of an organism. E.g Muscle

Question 3

What is a tissue and an example?

Answer 3

A group of similar cells that work together to carry out a particular function. E.g epitherial tissue

Question 4

What is an organ?

Answer 4

A group of different tissues that work together to perform a particular function

Question 5

What’s an organ system?

Answer 5

A group of organs that work together

Question 6

What’s an organism?

Answer 6

Highest level of organisation made up of multiple organ systems working together

Question 7

How do you create your sample for a food test?

Answer 7

1. Crush using mortel & pestle
2. Put in beaker with distilled water
3. Filter out using funnel and filter paper

Question 8

What is the Benedict’s Test?

Answer 8

• Test for sugars
• transfer 5cm3 of sample into a water bath at 75°c for 5 mins.
• if there are no reducing sugars, it stays blue.
• it turns brick red if sugars are present

Question 9

What is the iodine test?

Answer 9

• test for carbohydrates
• mix 5cm3 of sample with iodine solution.
• Creates a brown/orange colour which will turn black/blue if it contains starch

Question 10

What is the biuret test?

Answer 10

• tests for proteins
• mix 2cm3 of sample with 2cm3 biuret solution
• if contains proteins it goes from blue to pink/purple

Question 11

What is the emulsion test?

Answer 11

• tests for lipids
• mix sample with 2cm3 of ethanol and 2cm3 of distilled water
• it turns cloudy white if lipid is present