Chemistry of Life in Cells

What is the primary role of carbohydrates in living organisms?

• To store genetic information

• To provide energy

• To form cell membranes

• To act as enzymes

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Which of the following is a function of nucleic acids in cells?

• To provide structural support

• To store and transmit genetic information

• To insulate the body

• To catalyze chemical reactions

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Phospholipids are crucial components of which cell structure?

• Nucleus

• Cell membrane

• Ribosome

• Mitochondria

Proteins are essential for many cellular processes. Which of the following is NOT a role of proteins?

• Acting as enzymes

• Storing genetic information

• Providing structural support

• Transporting molecules

Lipids are important for energy storage. Which of the following is a characteristic of lipids?

• They are soluble in water

• They are made of amino acids

• They do not mix with water

• They form the genetic code

Why is water important for cellular processes?

• It acts as a genetic material

• It provides energy

• Many cell processes are not possible without it.

• It forms the cell wall

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Which of the following best describes the role of the cell membrane?

• It stores energy for the cell

• It controls the movement of substances in and out of the cell

• It synthesizes proteins

• It replicates DNA

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Identify the four types of molecules important for cell processes.

• Carbohydrates, lipids, proteins, nucleic acids

• Water, oxygen, carbon dioxide, nitrogen

• Vitamins, minerals, enzymes, hormones

• Sugars, starches, fibers, fats

What is the significance of nucleic acids in protein synthesis?

• They provide energy for the process

• They act as enzymes to speed up reactions

• They contain the instructions for building proteins

• They form the cell membrane

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Proteins are made up of smaller molecules called what?

• Enzymes

• Amino acids

• Sugar

• Atoms

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