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Elements of life

Biology • Atoms, Water & Chemical Bonds • Knowledge-Based • 5 questions

Elements of life Knowledge-Based Download PDF

Biology · Chemistry of Life · Biology · Atoms, Water & Chemical Bonds

5 Biology practice questions on Elements of life. Questions that assess core concepts and understanding.

Questions

  1. 1.

    Which of the following chemical elements is universally present in all proteins and nucleic acids, but is absent from pure carbohydrates and simple lipids?

    • A) Phosphorus
    • B) Sulfur
    • C) Nitrogen
    • D) Carbon
  2. 2.

    Which of the following chemical elements is present in the amino acids methionine and cysteine and forms covalent bridges essential for stabilizing protein tertiary structure?

    • A) Sulfur
    • B) Phosphorus
    • C) Nitrogen
    • D) Potassium
  3. 3.

    Which of the following chemical elements is an essential structural component of nucleic acid backbones, phospholipids, and adenosine triphosphate (ATP)?

    • A) Phosphorus
    • B) Sulfur
    • C) Calcium
    • D) Iron
  4. 4.

    Which of the following chemical elements is classified as a trace element required in minute quantities for normal human physiology?

    • A) Calcium
    • B) Phosphorus
    • C) Sulfur
    • D) Iron
  5. 5.

    Which four chemical elements make up approximately 96 percent of the mass of most living organisms?

    • A) Carbon, hydrogen, calcium, and iron
    • B) Nitrogen, phosphorus, sulfur, and potassium
    • C) Carbon, hydrogen, oxygen, and nitrogen
    • D) Oxygen, sodium, chlorine, and magnesium