Question

11 multiple choice 5 points when an enzyme is denatured, it’s ______ is changed.
order of amino acids
chemical composition
substrate
shape
12 multiple choice 5 points bears are able to hibernate all winter from eating food high in lipids. in which two ways does this
quick energy and insulation
long term energy and insulation
long term energy and building muscle
quick energy and building muscle

Explanation:

Question 11

Enzymes are proteins with a specific 3D structure (shape) crucial for their active site to bind substrate. Denaturation involves breaking non - covalent bonds (like hydrogen bonds) that maintain the protein's secondary, tertiary, or quaternary structure. The order of amino acids (primary structure) isn't changed in denaturation, the chemical composition (it's still the same protein) doesn't change, and the substrate is what the enzyme acts on, not what's changed in denaturation. So when an enzyme is denatured, its shape is changed.

Lipids are a source of long - term energy storage (more than carbohydrates for long - term use). Also, lipids (like fats) provide insulation, which helps bears stay warm during hibernation. Carbohydrates are for quick energy, and proteins are for building muscle. So lipids in the bears' food provide long - term energy and insulation.

Answer:

D. shape (assuming the options are labeled A - D with A: order of amino acids, B: chemical composition, C: substrate, D: shape)

Question 12