A&P: Water, Ions, and Biomolecules

Why is water essential for living organisms?

• It is the primary component of the human body.

• It is used as a fuel source.

• It is only needed by aquatic organisms.

• It is not essential; organisms can adapt to its absence.

What is the role of ions in biological systems?

• They are insignificant and rarely found in organisms.

• They help in the transmission of nerve impulses.

• They prevent water from freezing.

• They are the primary source of energy.

Which of the following is NOT a function of carbohydrates in living organisms?

• Providing energy

• Storing genetic information

• Serving as a dietary fiber

• Supplying raw materials for synthesis of other molecules

What is the primary role of lipids in living organisms?

• Speeding up chemical reactions

• Providing structural support for cells

• Storing energy

• Facilitating communication between cells

Which of the following is a protein's function in living organisms?

• Insulation

• Catalyzing biochemical reactions

• Storing genetic information

• Providing buoyancy

Nucleic acids are important in living organisms because they:

• Provide structural support to the cell membrane.

• Store and transmit genetic information.

• Act as a primary source of energy.

• Serve as enzymes.

How does water contribute to temperature regulation in organisms?

• By changing state at high temperatures

• Through its low heat capacity

• By acting as an insulator

• Due to its high specific heat capacity

The four macromolecules are made up of what elements?

• Carbon and Hydrogen

• Carbon and Oxygen

• Hydrogen and Oxygen

• Carbon and Nitrogen

What is the monomer for fats and oils (lipids)?

• Triglycerides

• Phospholipids

• Steroids

• Waxes

Enzymes, which are vital for catalyzing reactions, are primarily made of which macromolecule?

• Carbohydrates

• Lipids

• Proteins

• Nucleic acids