Bacterial Structure and Function in Health and Disease

Bacteria are prokaryotic cells crucial to human health and disease. They lack complex structures like a nucleus but have a cell envelope, including a cell wall that determines gram staining. Some bacteria have a capsule for protection and adherence. The plasma membrane encloses the cytoplasm and is vital for various functions. Inside, ribosomes synthesize proteins, and the nucleoid contains genetic material. Plasmids offer advantages like antibiotic resistance. Bacteria move or attach using pili, fimbriae, and flagella.

What distinguishes prokaryotic cells like bacteria from eukaryotic cells?

• Ability to perform photosynthesis

• Lack of membrane-bound organelles

• Having a complex cell structure

• Presence of a nucleus

What is the primary function of the bacterial cell wall?

• To synthesize proteins

• To protect the bacteria

• To perform photosynthesis

• To store genetic material

How do gram-positive bacteria differ from gram-negative bacteria?

• Gram-negative bacteria retain the staining dye

• Gram-positive bacteria have a thinner peptidoglycan layer

• Gram-negative bacteria have a capsule

• Gram-positive bacteria have a single thick peptidoglycan layer

What is the role of the plasma membrane in bacterial cells?

• It stores genetic information

• It is responsible for protein synthesis

• It maintains the cell's internal environment

• It provides structural support

Which of the following is NOT a function of the bacterial plasma membrane?

• Protein synthesis

• Photosynthesis

• Respiration

• Synthesis of lipids

What is the function of ribosomes in bacterial cells?

• To protect the cell

• To synthesize proteins

• To transport nutrients

• To store energy

What is the nucleoid in bacterial cells?

• A membrane-bound organelle

• A region containing the cell's chromosome

• A structure for movement

• A type of ribosome

What advantage do plasmids provide to bacteria?

• They aid in movement

• They store nutrients

• They help in photosynthesis

• They confer antibiotic resistance

What is the function of pili in bacteria?

• To perform photosynthesis

• To store genetic material

• To synthesize proteins

• To attach to surfaces

How do flagella benefit bacterial cells?

• They provide structural support

• They store genetic information

• They allow the bacteria to move

• They help in protein synthesis