In some cases, it may inhibit pathogen invasion of cells. Go back to question 7a or go on to question 7b . Examples could include turpentine and rosin in pine trees or gibberellin. Go back to question 6a or go on to question 6b . Explain the function and location of the pectin molecule shown in the diagrams and how the galacturonic acid influences its properties.
Pectins are components of the middle lamella and the matrix phase of the primary cell wall.
The galacturonic acid is important in making pectins acidic and making them soluble in hot water. Go back to question 1 or go on to question 2 . Lectins are proteins that specifically bind to or recognize specific sugars, but they are not antibodies. Abrin and ricin are examples. Go back to question 6b or go on to question 6c .