Question 1:

Which of the following is NOT a characteristic of bacterial cells?

Explanation: Bacterial cells do not have a nucleus. Unlike eukaryotic cells, the genetic material in bacteria is not enclosed within a nucleus. Therefore, option A is correct.

Question 2:

What is the function of pili in bacterial cells?

Explanation: Pili (or fimbriae) in bacterial cells are used for attachment to surfaces. They help bacteria adhere to host tissues or other surfaces, facilitating colonization and biofilm formation. Therefore, option C is correct.

Question 3:

Which of the following is responsible for the motility of bacterial cells?

Explanation: Flagella are responsible for the motility of bacterial cells. Flagella are long whip-like structures that allow bacteria to move towards or away from different stimuli in their environment. Therefore, option A is correct.

Question 4:

Which of the following is NOT a mode of bacterial reproduction?

Explanation: Bacterial cells do not undergo mitosis. Unlike eukaryotic cells, bacterial cells divide by binary fission, a process in which the cell replicates its genetic material and divides into two daughter cells. Therefore, option D is correct.

Question 5:

What is the primary function of the bacterial cell wall?

Explanation: The primary function of the bacterial cell wall is protection. It provides structural support and helps protect the bacterial cell from changes in osmotic pressure and external threats. Therefore, option A is correct.