Question

polymers are broken down into monomers through a process called hydrolysis. monomers are joined together to form polymers through a process called hydrolysis. clear selection
which of the following is not a primary function of proteins in living organisms?
transport of substances across cell membranes.
structural support.
long - term energy storage.
catalysis of chemical reactions.
if a scientist is studying a molecule that is composed of a long chain of nucleotides, which type of biological macromolecule are they most likely investigating?
carbohydrate
protein
nucleic acid
lipid
which of the following best describes the basic molecular structure of a disaccharide?
two simple sugar units joined together.
a single unit of a simple sugar.
a molecule composed of glycerol and fatty acids.
a long chain of many sugar units.

Explanation:

1. Polymers are broken down into monomers by hydrolysis, and monomers form polymers by dehydration - synthesis, so the first two statements are incorrect.
2. Proteins function in transport across cell membranes (e.g., transport proteins), provide structural support (e.g., collagen), and catalyze reactions (enzymes). Long - term energy storage is mainly by fats, not proteins.
3. Nucleic acids are composed of long chains of nucleotides.
4. Disaccharides are made up of two simple sugar units.

Answer:

1. None of the given options are correct for the first question as both statements are wrong.
2. C. Long - term energy storage
3. C. Nucleic acid
4. A. Two simple sugar units joined together