Indicate if each of the following descriptions matches lipids (1), nucleic acids (2), polysaccharides (3), or proteins (4). Your answer would be a four-digit number composed of digits 1 to 4 only, e.g. 1332.
( ) Their monomers contain phosphorus and nitrogen.
( ) They constitute almost half of the cell's dry mass.
( ) They are the main constituent of all cellular membranes.
( ) They are largely hydrophobic and can store energy.

Question

Quizplus · Accepted Answer

The nucleotides contain one to three phosphate groups and a nitrogen-containing base, and are polymerized to form long nucleic acid molecules such as DNA. Proteins are made of amino acids and make up half of the dry mass of the cell, i.e. approximately 15% of the total cell weight. Lipids have large hydrophobic fatty acid chains and, in addition to forming bilayer membranes, can store food energy and release it when necessary.

Indicate If Each of the Following Descriptions Matches Lipids (1)