predicted paper 1

Question 1

suggest why engulfing chloroplasts gave an advantage to these early eukaryote organisms

Answer 1

use chloroplast for photosyntheisis to produce glucose soable to survive longer with less food needed

Question 2

explain how standard deviation can help interpret data

Answer 2

find spread of data around mean, if there is no overlap it shows the data is significant

Question 3

what does the student need to control?

Answer 3

temperature OF SOLOUTION
pH OF SOLOUTION

Question 4

Explain the curve for enzyme A ON INCREASING CONCENTRATION

Answer 4

• initially rate of reaction increases as substrate concentration increases as enzyme substrate complex are formed
• increased substrate concentration increases collisions forming more enzyme substrate complexes
• eventually slows down as enzyme becomes occupied and become a limiting factor

Question 5

explain and describe 2 aseptic techniques

Answer 5

flame NECK of culture bottle to prevent contamination of bacteria
disinfect surfaces to prevent contamination

Question 6

compare structure of prokaryote and animal cell

Answer 6

circular dna linda dna
hastens no hastens
70 S ribosome 80 s ribosome
no nucelus, ncuelus
membrane bound organelles no membrane bound organelles

Question 7

how can you tell which inhibitor it is

Answer 7

increase concentration f substrate will increase rate of reaction of competitive but not non competitive inhibitor

Question 8

why does nblood need to be specific for human

Answer 8

red blood cells have antigens potential rejections