The French biochemist and microbiologist Louis Pasteur investigated the metabolism of yeast, which can survive under both aerobic and anaerobic conditions
He observed that the yeast consumed sugar at a much faster rate under anaerobic conditions than they did under aerobic conditions. Explain this "Pasteur effect."
Under anaerobic conditions, fermentation is being used, producing only two ATP molecules per glucose molecule. Under aerobic conditions, cellular respiration is being used, producing 36 to 38 ATP molecules per glucose molecule. More glucose is thus required under anaerobic conditions to yield the same amount of ATP as is produced under aerobic conditions.
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Which of the following statements is true?
a. Chromosomes are classified into two categories, the sex chromosomes that determine gender and autosomes that determine non-gender related traits. b. Homologous chromosomes differ in banding patterns, the traits they code for and size. c. While sex chromosomes determine different genders they look the same until they are stained. d. In humans all 46 chromosomes have an identical match called the homologue.
Which does NOT involve testing microbial sensitivity to antimicrobials?
A) disk diffusion method B) dilution method C) minimum inhibitory concentration D) toxic dosage level
Four of the following statements about the H5N1 virus are true. Which one is false?
A. It is symptomless in pigs. B. It has a high mortality rate in humans. C. It cannot infect birds. D. It moves poorly from human to human. E. It can move between pigs.
An emerging disease is one that
A. is now present on multiple continents. B. can be transmitted in multiple ways. C. is newly recognized in the last two decades. D. has suddenly caused an epidemic. E. can infect both humans and animals.