metabolism

Question 1

what is and does respiration do?

Answer 1

it’s a chemical reaction that releases energy from glucose

Question 2

what is the energy released by respiration used by and used for?

Answer 2

by enzymes to synthesise new molecules in the cell

Question 3

what is metabolism?

Answer 3

the sum of all the chemical reactions in a cell or the body

Question 4

the sum of all chemical reactions in a cell or the body is called?

Answer 4

metabolism

Question 5

glucose is the starting point for many new chemicals.

what is glucose converted to in plant cells?

Answer 5

• cellulose. (strengthens the plant cell wall)
• starch. (storage form of glucose)
• reacts with nitrate ions to create AMINO ACIDS (used to synthesise proteins)

Question 6

in humans and other animals, what is glucose converted to?

Answer 6

glycogen (storage form of glucose)

Question 7

how are lipid molecules formed ?

Answer 7

1 glycerol molecule + 3 fatty acid molecules —> lipid

we find lipid in the cell membrane

Question 8

where do we find lipid?

Answer 8

in the cell membrane

Question 9

what does the final reaction of metabolism involve?

Answer 9

protein

Question 10

what happens to excess proteins

Answer 10

they are broken down into the chemical urea

the urea is then excreted by the kidneys.