Starting with a single bacterial cell at time zero, assuming binary fission every 20 minutes, how many cells will be present in a culture after 3 hours?   a. 1,024  b. 512  c. 2.0 X 103 (2,000)    d. 3.0 X 102 (300)    e. Correct answer not given

the transfer of genetic material during bacterial conjugation requires? a. flagella b. sex pili c. periplasmic flagella d. fimbriae e. cilia

The bacterial generation time refers to a.   The time required for a population of organisms to double in number through one round of binary fission   b.   The time when both the total cell number and cell mass double up   c. Both A and B d. Neither A nor B Clear my choice

Use the following diagram to answers the questions. A. Is this cell Gram + or Gram -? Provide 2 pieces of evidence to support your answer. B. If treated with Gram stain, what colour would the cell above appear? Explair what does this mean. C. Which structures above could be involved in conjugation? Why conjugation is an important process for the bacteria B C

Which of the specimen(s) is a eukaryote cell?   A. lymphocyte and red blood cells   B. dust mite   C. E. coli

In the experiments below, different prokaryotic cells were grown in broth cultures in the presence or absence of an antibiotic (either vancomycin or polymixin) After 1 hour, cells were rinsed, and the percent of bacteria that survived was determined. According to the data, which experiment (A or B) was done with vancomycin and which was done with polymyxin? Explain your reasoning in both cases. 100 0 A Bacillus E. coli with antibiotic without antibiotic B Methanoge n 100 Bacillus E. coli Methanogen

D A 5. What conclusion can you draw from the images of E. coli cells (above) taken from a culture in Stage C/D of the graph? A. The cell on the left is probably starving C. The cells will eventually make an endospore to survive D. The cell on the left is dead B. The cell on the right is starving E. Both cells will divide 6. Microbe X is producing 38 ATP per glucose while Microbe Y is producing 2 ATP per glucose. Which of these statements is most likely true? Choose all that apply. A. Microbe Y is probably fermenting sugar B. Microbe X is switching between O2 and NO3 in respiration C. phosphofructokinase is more likely to be inhibited in Microbe Y than Microbe X D. Microbe Y is probably growing anaerobically E. Microbe X is mostly relying on substrate-level phosphorylation H* innnde H* Na+ Na* Cytoplasm periplasm 7. What is responsible for the movement of H* out of the cell (above)? A. outer membrane porins B. flagella motor proteins C. cytochrome oxidase complex D. ATP synthase E. NADH…

THIS IS A MULTIPART QUESTION, PLEASE ANSWER ALL Using the image: 1. How would you categorize this medium? (Living/nonliving, Synthetic/complex, Rich/minimal) Briefly explain your responses. 2. Name the ingredient(s) that match the following nutrients: a. Source(s) of carbon b. Source(s) of nitrogen c. At least one source of minerals d. At least one source of growth factors, if any 3. What about this medium would change if agar were added as an ingredient? 4. Would you expect this medium to be differential, selective, or both? Explain your response.