Imagine That You Have Set Up a Genetic Screen to Identify

question 4

Multiple Choice

Imagine that you have set up a genetic screen to identify E. coli mutants that cannot metabolize the amino acid tryptophan for energy. Beginning with a master plate containing many colonies, you prepare replica plates on medium with glucose or tryptophan as the only energy source. You would look for colonies that ________.

• A) cannot grow on either type of media
• B) can grow on both types of media
• C) can grow only on the plates with tryptophan
• D) can grow only on the plates with glucose

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Definitions:

Connective Tissues

Tissues in the body that support, bind together, or separate other tissues and organs, characterized by few cells and substantial extracellular matrix.

Bone and Cartilage

Connective tissues in the body, where bone is hard and dense, providing structure and support, while cartilage is more flexible and cushions joints.

Lacunae

Small cavities in bone or cartilage tissue housing cells like osteocytes or chondrocytes.

Simple Squamous Epithelium

A single layer of flat cells lining surfaces where diffusion or filtration occurs, such as the alveoli in the lungs.