Question

what do fish, cheese, eggs, bacon, olive oil, and nuts have in common? they are all sources of fat. fats are part of a diverse group of molecules called lipids. lipids also include phospholipids, waxes, and steroids. lipids are one of the three main types of biological macromolecules, or large carbon - based molecules, found in the foods we eat. the other two are carbohydrates and proteins.

lipids perform many different functions. for example, fats store energy for long - term use, while phospholipids are the building blocks of cell membranes. waxes form protective outer barriers on animals and plants. steroids function as chemical messengers that regulate processes in the body.

select the true statements.

lipids are used for quick - acting, short - term energy in cells.

lipids are used to build cell membranes.

steroids are a type of lipid.

walnuts, salmon, and butter are dietary sources of lipids.

Explanation:

• Lipids are used to build cell membranes: As per the text, phospholipids (a type of lipid) are the building blocks of cell membranes.
• Steroids are a type of lipid: The text clearly states that lipids include steroids.
• Walnuts, salmon, and butter are dietary sources of lipids: The first paragraph mentions that nuts (walnuts), fish (salmon - a type of fish), and fats (butter is a source of fat which is a lipid) are sources of lipids.
• Lipids are used for quick - acting, short - term energy in cells: This is false. The text says fats (a type of lipid) store energy for long - term use. Carbohydrates are typically for quick - acting, short - term energy.

Answer:

• Lipids are used to build cell membranes.
• Steroids are a type of lipid.
• Walnuts, salmon, and butter are dietary sources of lipids.