How are proteins, lipids, and polysaccharides similar?
A) They contain the same atoms are types of bonds between atoms.
B) They are natural polymers composed of repeating monomeric units.
C) They are formed during exergonic metabolic reactions in a cell.
D) They have characteristics similar to the elements making them up
Since Jiskha doesn't have a biology expert at this time, please try posting your question at this site.
http://www.biology-online.org/biology-forum/
In addition, be sure to make really good use of KhanAcademy!
http://www.khanacademy.org/science/biology
Choose from the general topics at the right and then find the specifics you need within each topic.
I am not a biologist but A and C are true.
B) They are natural polymers composed of repeating monomeric units.
The correct answer is B) They are natural polymers composed of repeating monomeric units.
Proteins, lipids, and polysaccharides are all types of biomolecules found in living organisms. They are similar in that they are all natural polymers, meaning they are composed of repeating units called monomers.
Proteins are polymers made up of amino acids as monomers. Amino acids are linked together in a specific sequence to form a linear chain, and this chain then folds into a specific three-dimensional structure, which determines the protein's function.
Lipids are another type of natural polymer. They are composed of fatty acids as monomers. Lipids include molecules such as triglycerides, phospholipids, and steroids. They are primarily involved in energy storage, insulation, and serving as structural components of cell membranes.
Polysaccharides are complex carbohydrates made up of monosaccharides (simple sugars) as monomers. Examples of polysaccharides include starch, glycogen, and cellulose. They serve as energy storage molecules (starch and glycogen) or structural components (cellulose) in cells.
While the answer choices A, C, and D may seem plausible, they are not accurate statements to describe the similarities between proteins, lipids, and polysaccharides. It is important to understand the fundamental composition and structure of these biomolecules to appreciate their similarity as natural polymers.