Year 9 Rev

Question 1

Ribosomes

Answer 1

Structures in prokaryotic and eukaryotic cells, they create protein

Question 2

Why do egg and sperm cells contain haploid nucleuses (nuclei)

Answer 2

Haploids=contain only half of genetic information
When a sperm cell fussed with a egg cell a diploid zygote is formed with all the information needed

Question 3

Magnification =

Answer 3

Image size (i) / real size (r)

Question 4

What are enzymes

Answer 4

Enzymes are biological catalysts that control reactions in the body. Each enzyme is specific (only works with one substrate)

affected by temperature substrate c indentation and ph

Question 5

What are substrates

Answer 5

When the enzyme has attached to the substrate, the molecule is called the enzyme-substrate complex.
For example, the sugar found in milk is called lactose. With the aid of the enzyme, lactase, the substrate, lactose, is broken down into two products, glucose and galactos