Prelims Summative Microbiology

Question 1

he works of Louis Pasteur and Robert Koch paved way to:

Answer 1

disprove that microorganisms could arise from non-living matter and develop methods for

Question 2

Which of the following pioneers of microbiology is credited with the discovery of microorganisms using quality magnifying lenses:

Answer 2

Leeuwenhoek

Question 3

Spontaneous generation is associated with which of the following

Answer 3

life from non-living materials

Question 4

Louis Pasteur:

Answer 4

disproved the theory of spontaneous generation by developing solid media upon which he grew organisms in a pure culture

Question 5

Koch’s postulates establish

Answer 5

cause-effect relationship between a specific microorganism and an infectious disease

Question 6

All bacteria

Answer 6

lack nuclei

Question 7

Which of the following microscopes produce three dimensional images?

Answer 7

scanning electron

Question 8

Which of the following not only reveals cell morphology but will provide additional information about the specimen:

Answer 8

Gram stain

Question 9

The peptidoglycan molecule is responsible for the

Answer 9

Semi-rigid cell wall structure of prokaryotes

Question 10

The Gram stain is based on differences in the __________ of bacteria.

Answer 10

cell wall

Question 11

Which one of the following statements does NOT describe flagella

Answer 11

they are responsible for attachment

Question 12

Formation of endospores:

Answer 12

can be triggered by adverse environmental conditions

Question 13

What do bacteria, algae, viruses, protozoa, and fungi all have in common?

Answer 13

. are too small to study with the unaided eye

Question 14

If a cell is expending a lot of energy, which of the following would be the best nutrient molecule to be broken down for immediate energy:

Answer 14

glucose

Question 15

Which of the following stains would be most suitable for microscopic study of bacterial cells that have a high lipid content in their cell walls

Answer 15

acid-fast stain

Question 16

The gram stain:

Answer 16

will differentiate bacterial cells based on chemical differences in their cell walls

Question 17

Which of the following is NOT true about bacterial endospores?

Answer 17

All bacteria can sporulate

Question 18

In bacteria, DNA is found where?

Answer 18

. In the nucleoid

Question 19

Which of the following is not true of the Gram stain process?

Answer 19

Gram positive bacteria will turn pink

Question 20

he method of pateurization called Ultra-High Temperature(UHT) involves which of the following?

Answer 20

Heating is done at 140 degrees for a period of 15 seconds and 149 degrees for 0.5 seconds