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TLS Online TPP Program

#Question id: 15604

The bacteria which cause septicaemia are fast becoming resistant to the antibiotics used for controlling them. Which one of the following explanations fits best?

#Unit 12. Applied Biology
  1. Each and every individual bacterium, in order to survive, develops a resistance to the antibiotic when exposed to it, and passes that resistance on to future generations.
  2. Only some bacteria, in order to survive, develop a resistance to the antibiotic when exposed to it, and pass that resistance on to future generations.
  3. A few bacteria have a natural heritable resistance to the antibiotic, so they survive when exposed to it, and pass that resistance on to future generations.
  4. All the bacteria have a natural heritable resistance to the antibiotic, so they survive when exposed to it, and pass that resistance on to future generations
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TLS Online TPP Program

#Question id: 1099

#Unit 4. Cell Communication and Cell Signaling

How does the toxin of Vibrio cholerae cause profuse diarrhea?
TLS Online TPP Program

#Question id: 1100

#Unit 4. Cell Communication and Cell Signaling

Which of the following results would most likely be an immediate result of a growth factor binding to its receptor?
TLS Online TPP Program

#Question id: 1101

#Unit 4. Cell Communication and Cell Signaling

The activity of adenylyl cyclase is essentially the opposite of which of the following enzymes?
TLS Online TPP Program

#Question id: 1102

#Unit 4. Cell Communication and Cell Signaling

Caffeine is an inhibitor of phosphodiesterase. Therefore, the cells of a person who has recently consumed coffee would have increased levels of which of the following molecules?
TLS Online TPP Program

#Question id: 1103

#Unit 4. Cell Communication and Cell Signaling

An inhibitor of which of the following enzymes could be used to block the release of calcium from the endoplasmic reticulum?
TLS Online TPP Program

#Question id: 1104

#Unit 4. Cell Communication and Cell Signaling

Which of the following statements is true of signal molecules?