Question

question 7 (1 point)
which substance is composed of lipids?
wood
hair
oil on feathers
honey
question 8 (1 point)
proteins are the most diverse group of biological molecules in human cells.
true
false
question 9 (1 point)
which molecule is used as primary energy storage in animals?
starch
triglycerides
phospholipids
steroids

Explanation:

Question 7

Lipids are a diverse group of organic compounds that are insoluble in water but soluble in non - polar solvents. Oil is a type of lipid. Wood is mainly composed of cellulose (a carbohydrate), hair is mainly composed of proteins (keratin), and honey is mainly composed of sugars (carbohydrates).

Proteins have a wide variety of functions in the cell, such as catalyzing reactions (enzymes), providing structural support, transporting molecules, and acting as signaling molecules. There are thousands of different proteins with different structures and functions in human cells, making them the most diverse group of biological molecules.

Starch is the primary energy storage molecule in plants. Phospholipids are important components of cell membranes. Steroids have various functions such as being hormones (e.g., testosterone, estrogen). Triglycerides (fats) are the primary energy storage molecules in animals as they can store a large amount of energy.

Answer:

oil on feathers

Question 8