The outermost layer of a Gram-positive bacterium is made of:Question 10Answera.peptidoglycan.b.proteins.c.lipids.d.carbohydrates.e.chromosomes.

Breakdown the Problem

1. Identify the structure and composition of the outermost layer of a Gram-positive bacterium.
2. Review the components listed in the possible answers to determine which is correct.

Relevant Concepts

• Gram-positive Bacteria Structure: The outer layer of Gram-positive bacteria is characterized by a thick peptidoglycan layer, which is crucial for maintaining cell shape and integrity, and for withstanding osmotic pressure.

Analysis and Detail

1. Peptidoglycan Layer: This is the primary structural component in the cell wall of Gram-positive bacteria, consisting of sugars and amino acids.
2. Other Components: While proteins, lipids, carbohydrates, and chromosomes are present in bacteria, they do not make up the outermost layer in the context of Gram-positive bacteria.

Verify and Summarize

Upon analyzing the components, it is confirmed that the outermost layer of a Gram-positive bacterium is made up predominantly of peptidoglycan.

Final Answer

The correct answer is a. peptidoglycan.