processes

Question 1

how an amino acid added to a polypeptide that’s is being formed at a ribosome during translation (3)

Answer 1

1-tRNA binds to specific amino acid
2-condensation reaction
3- anticodon binds to codon

Question 2

how can a sample of an organelle be isolated (4)

Answer 2

1- homogenise the sample
2-add an isotonic solution - to stop cellular functions
3-centerfigue to collect the nuclei and debris
4- use a ultracentrifuge at different faster speeds until the sample of the organelle is collected

Question 3

digestion of starch by mammal (4)

Answer 3

1- amylase hydrolyses the starch into maltose
2-breaking the glycosidic bonds
3-maltose enters the small intestine the microvilli
4- where the pancreas secretes the enzyme maltase to hydrolyse the maltose into glucose

Question 4

explain the roll of micelles in the absorption of fats (5)

Answer 4

1- micelles include bile salts and fatty acids
2-make the fatty acids soluble in water
3-carry the fatty acids into the cell
4-maintain higher concentration of fatty acids to ileum
5-fatty acids is absorbed by diffusion