Question

question 9
plant cell walls contain which of the following in abundance?
cellulose
starch
maltose
lactose
glycogen

question 10
lactose is a disaccharide formed by the formation of a __ bond between glucose and __.
glycosidic; lactose
none of these answer choices are correct.
glycosidic; ribose
hydrogen; fructose
hydrogen; sucrose

question 11
which of the following is an extracellular matrix role of carbohydrates? (select all that apply.)
protect an insects internal organs from external trauma
provides energy for muscle movement
prevent plant cells from lysing after the plant is watered
maintain the shape of a fungal spore
provides energy for homeostasis

Explanation:

• Question 9: Plant cell walls are mainly composed of cellulose, which provides structural support. Starch is an energy - storage molecule in plants, maltose is a disaccharide, lactose is a milk - sugar, and glycogen is an animal energy - storage molecule.
• Question 10: Lactose is a disaccharide formed by a glycosidic bond between glucose and galactose. None of the given options have galactose as the second sugar.
• Question 11: Carbohydrates in the extracellular matrix can protect an insect's internal organs (e.g., chitin in insect exoskeletons), and prevent plant cells from lysing (cellulose in plant cell walls). Energy for muscle movement and homeostasis is mainly provided by ATP from glucose metabolism, not directly by extracellular matrix carbohydrates, and maintaining the shape of a fungal spore is more related to the cell wall components like chitin rather than typical extracellular matrix carbohydrate functions in the general sense.

Answer:

Question 9: cellulose
Question 10: None of these answer choices are correct.
Question 11: protect an insect's internal organs from external trauma, prevent plant cells from lysing after the plant is watered