Question

question 8
match each level of protein organization with the correct description
primary choose
secondary choose
tertiary choose
quaternary choose
question 9 1 pts
which organic compound is not only responsible for energy storage, but can also provide thermal insulation?
nucleic acids
proteins
lipids
carbohydrates
question 10 1 pts
which is the main structural component of the walls that surround plant cells?
starch
cellulose
phospholipids
glycogen

Explanation:

• Question 8: The primary structure of a protein is the linear sequence of amino - acids. The secondary structure consists of local folding patterns like alpha - helices and beta - sheets. The tertiary structure is the three - dimensional structure of a single polypeptide chain. The quaternary structure is the structure formed by the association of multiple polypeptide chains.
• Question 9: Lipids, specifically fats, are used for energy storage and provide thermal insulation.
• Question 10: Cellulose is the main structural component of plant cell walls.

Answer:

• Question 8: No options provided to match, but descriptions are: Primary - Linear sequence of amino - acids; Secondary - Local folding patterns (alpha - helices, beta - sheets); Tertiary - Three - dimensional structure of single polypeptide; Quaternary - Structure from multiple polypeptide chains association.
• Question 9: C. Lipids
• Question 10: B. Cellulose