Biology MCQ on Bacteria

A gliding motion, the mechanism of which is not understood, is a characteristic of

Bacterial flagella

Bacterial ribosomes

Plasmids are best thought of as

Bacterial flagella are powered by

The first stage of _______________ is characterized by the appearance of a chancre.

Rod shaped bacteria are called

Some bacteria form a thick-walled _______________ in response to poor nutrient conditions.

The disease caused by _______________ is sometimes called the “silent STD.”

Bacteria normally contain their genome in

Which of the following is a product for which bacteria are not employed?

Chemoautotrophic bacteria include

Nitrifying bacteria are an example of

Plant diseases such as citrus canker are caused by

A major portion of the world’s natural gas reserves were produced by

We can expect that one out of every _______________ bacteria have a mutant characteristic.

Which of the following belong to the Eubacteria?

All bacteria listed below are heterotrophic bacteria except

Pelvic inflammatory disease (PID) in women is caused by

The _______________ form a colony that approaches but does not reach true multicellularity.

In 1997 _______________ was the leading cause of death by a single infectious agent world-wide.

Genetic recombination occurs in bacteria through the transfer of

Gram-negative bacteria are resistant to the gram stain because of the presence of a large _______________ in an outer membrane layer.

Gram-negative bacteria are resistant to the gram stain because of the presence of a large _______________ in an outer membrane layer.

Organisms that obtain their energy by oxidizing inorganic chemical sources are called __________________.

Which of the following statements is(are) true about the cyanobacteria?

Bacteria are responsible for:

Which of the following are characteristics of bacterial cells?

When exposed to harsh conditions, some bacteria form:

Which one of the following statements is not true about bacteria and eukaryotes?

All of the following diseases are caused by bacteria except:

Streptococci are the bacteria which occur

Nostoc belongs to_______

In bacterial cell, which of the following is present?

Bacteria divide by

Which of the following bacteria are spherical in shape?

Which of the following bacteria are rods shaped?

which of the following bacteria are curved?

Electron microscope was discovered in:

Russian biologist named the viruses

Bacteria were first observed by

Viruses range is size from 20 nm to .

Viruses reproduce by:

Viruses appear like

The smallest viruses have only ________ genes

The protein coat that encloses the nucleic acid is in virus is called:

Capsid is made up of protein subunits called:

Some viruses have accessory structures called —— that help them infect their host

viruses may be:

Viruses have the ability to undergo:

HIV was discovered in:

Which bacteria found associatied with other organisms

In what year biologist had demonstrated that many diseases of man and other organisms were caused’by bacteria.

In bacterial cell plasma’ membrane is made up of:

In bacterial cell, which of the following is not present?

All viruses are

virus have

viruses are protein coat and nucleic acid

viruses are

Without DNA gyrase, bacterial chromosomes would

Competent bacteria can

In conjugation, two bacteria

Plasmids are

Plasmids are

The endosymbiont theory suggests

Chloroplasts are plant organelles that contain

The maternal parent of an organism overwhelmingly contributes

Mitochondrial DNA indicates a female who lived perhaps 200,000 years ago in Africa was

the direct maternal ancestor of everyone now living.

The word virus is derived from a Latin wordviron which means:

______discovered tobacco mosaic virus (TMV):

Bacteria were discovered by:

Cyanobacteria were discovered by:

Cyanobacteria were discovered by:

Cell membrane is composed of:

1nm =?

The average range size of virus is:

The protein subunits in the capsid of virus are

Virus capsid contains:

All viruses cause damage to their host: