Genes

Question 1

Explain how epigenetic changes can cause differences in a characteristic

Answer 1

-histone modification/dna methylation
-affects activation/ deactivation of genes (genes switched on or off)
-affecting enzyme production.

Question 2

explain role of dna ligase in dna replication 2

Answer 2

-it joins sections of DNA together
-by forming phosphodiester bonds
-forms bonds between phosphate and deoxyribose sugar

Question 3

Genome

Answer 3

All the genes in an individual or species

Question 4

ideal conditions for bacterial growth

Answer 4

-sufficient nutrients to respire and grow
-sufficient oxygen if bacteria relies on aerobic respiration
-optimum temperature and PH
-no buildup of toxic waste products