Question

what is the macromolecule that stores all our long - term energy and makes up part of our cell membranes?
carbohydrate
protein
electrons
lipids
carbon is a vital part of the phospholipids that make up cell membranes and the carbohydrates that make up cell walls. which of the following allows carbon to bond with up to four other atoms at a time and form the macromolecules that are essential to life?
the six protons in its nucleus
the six neutrons in its nucleus
the two electrons in its inner shell
the four electrons in its outer shell

Explanation:

1. Lipids store long - term energy and are part of cell membranes. Carbohydrates are mainly for short - term energy, proteins have various functions like structure and enzymes but not the main long - term energy storage for cell membranes, and electrons are subatomic particles not macromolecules.
2. Carbon has four electrons in its outer shell. This allows it to form up to four covalent bonds with other atoms, which is crucial for forming macromolecules essential to life. Protons and neutrons in the nucleus are related to the atom's identity and mass, not bonding ability, and the two electrons in the inner shell do not contribute to its bonding capacity for forming complex macromolecules.

Answer:

1. D. Lipids
2. D. the four electrons in its outer shell