Question

3 matching 0.75 points
match each of the following descriptions with one term on the list. terms can be used more than once.
found only in gram negative bacteria and
is responsible for endotoxin activity.
form axial filaments and give shape to spirochetes
an acid - fast bacterium
the main component of the bacterial cell wall.
region where dna is found in bacteria
random walk in bacteria involving rotation of flagella in
clockwise or anticlockwise directions
terms (partial list visible): endoflagella, flagellin, mycoplasma, run and tumble, lipid a, mycobacterium, nucleoid

Answer:

1. "Found only in Gram negative bacteria and is responsible for endotoxin activity."

• Explanation: Lipid A is the part of lipopolysaccharide (LPS) in Gram - negative bacteria that is responsible for endotoxin activity.
• Match: Lipid A

2. "Form axial filaments and give shape to spirochetes"

• Explanation: Endoflagella (or axial filaments) are characteristic of spirochetes and help in their movement and shape.
• Match: Endoflagella

3. "An acid - fast bacterium"

• Explanation: Mycobacterium is a genus of bacteria that are acid - fast, meaning they retain the primary stain in the acid - fast staining procedure.
• Match: Mycobacterium

4. "The main component of the bacterial cell wall." (Note: The original match here seems incorrect. The main component of the bacterial cell wall (peptidoglycan - containing walls) is peptidoglycan. But if we go with the given options and the possible intended question, if we consider the outer membrane of Gram - negative bacteria, but the main component of the cell wall (peptidoglycan layer) - however, among the given options, if we assume a mistake and maybe the question was about the outer membrane's lipid part, but more likely, if we follow the given options and the possible intended match, but actually the correct main component of the bacterial cell wall (for most bacteria) is peptidoglycan, which is not in the options. But if we consider the options, maybe there is a mistake. However, if we go with the given options and the way the question is set, perhaps a mis - question. But if we follow the original (incorrect) match, but actually the correct answer for main component of bacterial cell wall (peptidoglycan) is not here. But if we have to choose from the given, maybe a mistake. But assuming the question might have a typo, and if we consider the outer membrane's lipid A, but lipid A is part of LPS. Alternatively, if we consider the cell wall of Gram - positive has peptidoglycan, Gram - negative has peptidoglycan and LPS. But since the option given is Lipid A, which is incorrect. But following the original (wrong) match as per the image, but the correct biological fact is different. However, as per the given matching in the image (even if incorrect), the match is Lipid A, but that's wrong. The correct main component of bacterial cell wall is peptidoglycan. But since it's not in the options, maybe the question intended something else. But as per the image, the match is Lipid A (even though it's incorrect biologically).

5. "Region where DNA is found in bacteria"

• Explanation: In bacteria, the DNA is located in a region called the nucleoid, which is not a membrane - bound nucleus like in eukaryotes.
• Match: Nucleoid

6. "Random walk in bacteria involving rotation of flagella in clockwise or anticlockwise directions"

• Explanation: The "run and tumble" movement in bacteria involves the flagella rotating in different directions (clockwise for tumble, counter - clockwise for run) to move in a random - like walk pattern.
• Match: Run and tumble

Final Matches:

1. Found only in Gram negative bacteria and is responsible for endotoxin activity. - Lipid A
2. Form axial filaments and give shape to spirochetes - Endoflagella
3. An acid - fast bacterium - Mycobacterium
4. The main component of the bacterial cell wall. - (Note: Correctly should be peptidoglycan, but as per given options and image match - Lipid A (incorrect biologically))
5. Region where DNA is found in bacteria - Nucleoid
6. Random walk in bacteria involving rotation of flagella in clockwise or anticlockwise directions - Run and tumble