MDCAT Biology MCQ #103

A student examines a PTB diagram of a T4 bacteriophage. Which geometric description accurately identifies the shape of the phage head containing the DNA?

MDCAT Biology MCQ #103

  1. Question 1

    Q1. A student examines a PTB diagram of a T4 bacteriophage. Which geometric description accurately identifies the shape of the phage head containing the DNA?

    • A) Perfectly spherical
    • B) Strictly hexagonal
    • C) Helical cylinder
    • D) Elongated icosahedron

    Answer: Elongated icosahedron

    Explanation: The T4 bacteriophage head is an elongated icosahedron. Hexagonal is often used to describe the 2D appearance, but icosahedral is the 3D geometric reality.