Microbiology MCQs Mock Test – Chapter 70

The reproduction rate is equal to death rate in which stage

The most important vitamin for the growth of bacteria is

the first phase of a growth curve is

In the sigmoid curve (or) growth curve of bacteria how many stages are there

Cells are active and synthesizing new protoplasm. This stage of growth is called

Nagler reaction detects

Virulent factor in pneumococcus is

Vitamin K is necessary for the species

Example of anaerobic medium

The most important vitamin for the growth of bacteria is

Most bacteria do not require the ion

Ergot disease is caused by

Culture medium used for fungus is

The principle in microbiological assays is

The prote inaceous compound are converted to ammonia by

Clostridium welchii spore formation can be induced only on specified media such as

How much time a bacterium take for the complete duplication?

Sources of electron donars

Nitrites are oxidized to nitrates by a microorganism?

Physiologically the cells are active and are synthesizing new protoplasm in which stage of the growth in bacteria?

Rapid bacterial growth phase is known as?

The following disease are caused by Mycoplasma except

In the synthesis of cell components the major element required is

Log-phase is also known as

The bacteria which are able to grow at 0°C but which grow at 20°C to 30°C, are known as

If the source of energy for bacteria is from chemical compounds they are said to be

Electron microscope studies does not help in identifying the section of bacterial spore

The following organisms lack definite cell wall?

The most active stage in the sigmoid curve of bacteria in which maximum growth is attained

Which one of the following mineral elements play an important role in biological nitrogen fixation

D.pneumoniae can be cultivated in

Most bacteria require vitamins as

Wilson and Blair bismuth sulphite medium is used for the growth

In bacteria, the increase in population is in the manner

The orderly increase in the quantity of all the cellular components is known as

For the formation of cell-components the elements required are

pH required for the growth of bacteria is

Mycotoxins are produced by

The major constituents in agar are?

The no. of generations per hour in a bacteria is

The ion that is required in trace amounts for the growth of bacteria is

The most common mode of cell division in bacteria is

Growth in a closed system, affected by nutrient limitation and waste product accumulation is called?

D.pneumoniae can be identified by

Differential staining of bacteria spore is related to

The Bacter ia move in response to magnetic field is

Multiple antibiotic resistance is mediated by

“Antagonism “ is seen in

Yeast extract is an excellent source of?

The following organisms have been proposed as sources of single cell protein