Enzymes QP1 PMT

Question 1

What bonds does pH affect in enzymes

Answer 1

ionic bonds and hydrogen bonds

Question 2

give structural differences between amylose and cellulose

Answer 2

amylose has all monomers in the same orientation while in cellulose every alternate monomer is at 180 degrees

amylose= a-glucose, cellulose=b-glucose

amylose has hydrogen bonds within molecules and no hydrogen bonds between molecules while cellulose has H bonds between adjacent molecules

amylose has a 1-4 glycosidic bonds while cellulose has b 1-4 glycosidic bonds

Question 3

what properties of cellulose make it suitable for forming cell walls

Answer 3

-insoluble
-strong
- H bonds can form between adjacent fibrils

Question 4

why does a lower enzyme rate occur in a lower temperature

Answer 4

a lower temp is below the optimum.
There is low kinetic energy
Less chance of substrate entering the active site/ less chance of ESC formation/ fewer collisions between substrate and active site
- activation energy is harder to reach

Question 5

how do the structure of enzymes differ

Answer 5

different amino acid sequence/primary structure
-different tertiary structure (active site)

Question 6

how may DNA in different fish differ

Answer 6

-different base/nucleotide sequence
-different proportion of bases
-different allele/ gene would code for polypeptide

Question 7

how could the population of antarctic fish be conserved

Answer 7

-ban fishing
-limits of numbers caught
-protect this habitat
-ex situ/ captive breeding
-promoting other species for eating
-educating people on fishing industry