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8 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

Which cell type is considered to have the oldest ancestor?

A

Archaea

B

Bacteria

C

Eukarya

D

they all share the same ancestor

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8 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

All the following are considered eukaryotes except

A

archaea

B

fungi

C

protozoa

D

humans

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8 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

Which of the following is the most primitive?

A

Virus

B

Eukaryote

C

Archaeon

D

Mitochondria

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8 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

Which of the following is not found in the kingdom Monera?

A

Organelles

B

Organized cell structure

C

Ability to reproduce

D

Ability to use energy

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8 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

Carl Woese and his colleague are best known for establishing

A

the five kingdom system

B

the three domain system

C

the prokaryote-eukaryote system

D

the plant-animal system

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8 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

In the three domain system of classification, the traditional bacteria are placed in the

A

eukarya

B

archaea

C

eubacteria

D

none of these

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8 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

The idea of selective toxicity was first proposed by

A

Antony van Leeuwenhoek

B

Paul Ehrlich

C

Louis Pasteur

D

Alexander Fleming

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8 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

Which of the following microorganisms is classified as a member of archaebacteria?

A

Gyanobacteria

B

Methanobacteria

C

Trichomonads

D

Mycoplasma

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8 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

All the following are basic properties of cells except

A

cells have nuclei and mitochondria

B

cells have a genetic programme and the means to use it

C

cells are capable of producing more of themselves

D

cells are able to respond to stimuli

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8 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

Prokaryotic microorganism include

A

protozoa

B

fungi

C

bacteria

D

all of these

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8 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

Who discovered the bacteria that cause cholera?

A

Pierre Berthelot

B

Robert Koch

C

Louis Pasteur

D

Rudolf Virchow

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8 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

The third kingdom, protista, as suggested by E.H. Haeckel includes

A

bacteria

B

algae

C

fungi

D

all of these

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8 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

The first organism in most natural food chains is

A

a herbivore

B

a decomposer

C

photosynthetic

D

carnivorous

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8 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

Micro organisms are found in which of the following kingdom of five kingdom concept (Whittaker's classification)?

A

Monera

B

Protista

C

Fungi

D

All of these

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8 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

The individual best remembered for bringing microbes to the world is

A

Robert Hooke

B

Antony Van Leeuenhoek

C

Robert Koch

D

Masaki Ogata

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8 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

Most microbial structures and enzymes are composed of

A

lipids

B

proteins

C

carbohydrates

D

lipids and carbohydrates

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8 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

The foundation for the germ theory of disease was set down by

A

Robert Koch

B

Ronald Ross

C

Louis Pasteur

D

Walter Reed

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8 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

The three domain version of life on earth is based on the

A

nucleic acid sequence data

B

morphological traits

C

metabolic traits

D

characteristics of the cell wall

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8 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

Which of the following may account for the small size of the cells?

A

The rate of diffusion

B

The surface area/volume ratio

C

The number of mRNAs that can be produced by the nucleus

D

All of the above

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8 followers study24x7 01 Jan 1970 05:30 AM study24x7 study24x7

Which of the following structures is the smallest?

A

Viriod

B

Hydrogen atom

C

Bacterium

D

Mitochondrion

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