1. Examine the graph below, which shows growth curves of 4 strains of bacteria g
ID: 198634 • Letter: 1
Question
1. Examine the graph below, which shows growth curves of 4 strains of bacteria grown in the presence of glucose, at normal, atmospheric levels of oxygen. Because C & D both failed to grow under this condition, you repeated the experiment at a very low concentration of oxygen. Under this second condition, A grew very slowly, B grew at the same rate as in the first experiment, C did grow (although fairly slowly) and D still failed to grow at all. Based on the information provided, classify the bacteria represented by curves A, B, C & D by their oxygen requirements. (Match each class of microbe with the letter marking the growth of the bacterium mostly likely to fall into that class.) 2 0.7 0.07 0 3 69 12 15 18 Time (h) obligate aerobe Obligate anaerobe Aerotolerant anaerobe Microaerophile (4 points)Explanation / Answer
According to the given question A, B, C, and D can be labeled as:
Obligate aerobes can be perfectly matched with the option A. This is because, obligate aerobes need oxygen to grow. These organisms require the oxygen to metabolize the substances. This is the reason that when the level of oxygen was made to lower, the growth of these organisms also gets lower.
Obligate anaerobes can be perfectly matched with the option D. This is because obligate anaerobes are poisoned by the oxygen. These organisms cannot grow in the presence of oxygen.
Aerotolerant anaerobe can be perfectly matched with the option B. This is because these organisms does not require the oxygen for their growth but can tolerate the presence of oxygen.
Microaerophiles can be perfectly matched with the option C. This is because these organisms require oxygen but less than it present in the air. These organisms grow efficiently in the modified atmospheric conditions. The higher concentration of the oxygen is harmful for these organisms.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.