Bio

Question 1

Give two ways pathogens cause disease

Answer 1

-They release toxins
-they do tissue damage

Question 2

What is an antigen

Answer 2

A protein that stimulates the production of antibodies

Question 3

Why is the mitochondria, Golgi and rer associated with B lymphocytes

Answer 3

B lymphocytes are made from protein which is stimulated by an antigen coming into contact with a pathogen. Ribosomes in the RER make proteins and Mitochondria produces ATP for protein synthesis

Question 4

injecting a person with antivenin doesn’t give them long term protection, why?

Answer 4

Because its passive immunity and no memory cells are made

Question 5

Suggest one possible problem with injecting people with antivenin made passively?

Answer 5

could transfer Disease

Question 6

Describe the function and structure of nucleus

Answer 6

Structure
-Nucleur pores
-nucleur envelope
-assosiated with histones

Function
-where genetic info held
-controls protein synthesis

Question 7

Give 2 prokaryotic features not in eukaryotic

Answer 7

Circular DNA
no membrane bound organelle

Question 8

What do hydrophobic tails and hydrophilic heads do

Answer 8

Hydrophobic tails mean they form a channel
hydrophilic heads allow ions to move through membrane

Question 9

Explain viral replication

Answer 9

1)Attachment proteins attach to receptors
2)inject nucleic acid
3)reverse transcriptase rna to dna
4)cell produces viral proteins
5) virus is assembled and released

Question 10

Explain how two enzymes with different amino acid sequence catalyse for same Reaction

Answer 10

-they have similar tertiary sturctures
-so from enzyme substrate complexes