Structure and organisation

Question 1

What is an organ?

Answer 1

A group of tissues that work together to do a particular job

Question 2

What is an organelle?

Answer 2

A specialised structure within a cell

Question 3

What is a cell?

Answer 3

A basic structural and functional unit of a living organism

Question 4

What is a tissue?

Answer 4

A group of cells with a similar structure working together

Question 5

What is an organ system?

Answer 5

A group of organs with similar functions working together

Question 6

What is a nucleus?

Answer 6

Controls the cell activity and contains chromosomes.

Question 7

Describe the rest for glucose

Answer 7

1. Add benedict’s solution
2. Place in boiling bath
3. If glucose is present, orange-red precipitate forms.

Question 8

What is the test for starch?

Answer 8

1. Add iodine solution

2. If turns blue-black, starch is present

Question 9

What are the characteristics of an enzyme?

Answer 9

1. Biological catalysts
2. Not used up in reaction
3. Reaction specific
4. Made of protein

Question 10

What happens with enzymes?

Answer 10

1. Substrate enters enzyme’s active site
2. Forms enzyme-substrate complex
3. Reaction happens and product leaves active site

Question 11

How does temperature affect enzymes?

Answer 11

1. As it increases, reaction rate increases
2. Optimum temp is where the most reactions occur
3. If too hot proteins break down and enzymes become denatured

Question 12

What is the ph effect on enzymes?

Answer 12

1. There is an optimum ph
2. Ph affects shape of the active site.
3. At extremes the enzyme is denatured.

Question 13

What are the differences between animal and plant cells?

Answer 13

1. Animal cells don’t have a cell wall
2. There is no vacuole in an animal cell
3. Plant cells have chloroplasts