Question

QUESTION 13 An organism with a temperature growth range of 45°C to 60°C would be called a(n) o extremophile. thermoduric. o thermophile. psychrotroph. psychrophile.

Answer 1

13. extremophiles are organisms that thrives in extreme environments.

Thermoduric is a microorganism that is able to survive high temperatures; specifically it can servive pasteurization.

Thermophiles are a group of heat loving microbes having ability to grow at high temperature usually more than 45°C.

Psychrotrophs are cold-tolerant bacteria or archaea that have the ability to grow and reproduce at low temperatures usually between 15 and 20°C.

Psychrophiles are extremophilic organisms having ability to grow and reproduce in low temperatures, ranging from −20 °C to +10 °C.

Thus, correct answer is option c.

14. Phototrophs: Use sunlight to prepare food.

Parasites: Lives on/in host and get food from the host causing disease.

Saprobes: Group of fungi that get its nourishment from nonliving or decaying organic matter.

Autotrophs: Prepare its own food using CO2 and water from environment with the help od sunlight.

Lithoautotrophs: diverse group of procaryotes, united only by their ability to oxidize an inorganic compound as an energy source.

Thus, the correct answer is option c.

15. The last phase of bacterial growth curve is death phase where population of bacterial cells declines exponentially and the cells are not not metabolically active. The population of cells increase in log phase whic is the second phase not the last one. The patient exprience most severe stage of infection in stationary phase because that is the time where the pathogen concentration is maximum in the body and equal number of pathogen grow to that of number of pathogen dying.

Thus, the correct answer is option d.

16. lophotrichous: multiple flagella at one polar end.

peritrichous: flagella uniformly distributed over the body.

amphitrichous: having a single flagellum at each end.

atrichous: Without flagella.

monotrichous: one flagellum at only one pole or end.

Thus, the correct answer is option a.