Micro Organisms

Micro Organisms - Section 1

Q1: Which of the following structures is the smallest?

A Viriod

B Hydrogen atom

C Bacterium

D Mitochondrion

Q2: Eukaryotic cell organelles first emerged

A from a specialized lineage of cells within the kingdom Protista

B when prokaryotes engulfed each other and became interdependent

C when bacteria made their first attempts at reproduction

D just before the origin of the animal and fungal kingdoms

Q3: Genetic and biochemical similarities between contemporary cyanobacteria and eukaryotic chloroplasts are accepted to mean that

A eukaryotes evolved from bacteria

B eukaryotes evolved from archaea

C oxygenic photosynthesis first evolved in eukaryotes

D cyanobacteria arose from chloroplasts which escaped from plant cells

Q4: Which of the following is/are included in Kingdom Prokaryotae?

A Bacteria

B Protozoa

C Fungi

D All of these

Q5: All membranes of free-living organisms have phospholipid bilayers, but exception is

A bacteria

B fungi

C archaea

D protozoa

Q6: Who was the inventor of the Petri dish?

A R.J. Petri, an assistant of R. Koch

B A famous French cook

C Italian glass blower from Petri, Italy

D None of the above

Q7: The oldest eukaryotic organisms are considered to be

A diplomonads like Giardia

B archaea

C fungi

D animals

Q8: The membranes of which domains are chemically the most similar?

A Archaea and Bacteria

B Bacteria and Eukarya

C Eukarya and Archaea

D membranes of all three domains are chemically identical

Q9: Which of the following best represents the hierarchy of levels of biological classification?

A Phylum, kingdom, class, order, genus, species, family

B Kingdom, phylum, class, order, family, genus, species

C Kingdom, phylum, family, class, order, genus, species

D Class, order, kingdom, phylum, family, genus, species

Q10: Primary differences between cilia and flagella are

A arrangement of microtubules

B length and location of basal bodies

C how the microtubules are fused to each other

D number, length and direction of force

Q11: 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

Q12: Which of the following structure is absent in eukaryotic cells?

A Mitochondria

B Chloroplasts

C Golgi structure

D Mesosome

Q13: Most microbial structures and enzymes are composed of

A lipids

B proteins

C carbohydrates

D lipids and carbohydrates

Q14: 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

Q15: A newly discovered microscopic structure is hypothesized to be a living organism. Which of the following lines of evidence would support the contention that this organism may be alive?

A It contains DNA

B It is made of a single cell

C It utilizes energy

D All of these

Q16: Which one is not studied in microbiology?

A Bacteria

B Animal behaviour

C Fungi

D Algae

Q17: The individual best remembered for bringing microbes to the world is

A Robert Hooke

B Antony Van Leeuenhoek

C Robert Koch

D Masaki Ogata

Q18: Prokaryotic microorganism include

A protozoa

B fungi

C bacteria

D all of these

Q19: 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

Q20: Various bacterial species can be subdivided into

A subspecies

B biovarieties

C serovarieties

D all of these

Q21: The third kingdom, protista, as suggested by E.H. Haeckel includes

A bacteria

B algae

C fungi

D all of these

Q22: 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

Q23: Living organisms have many complex characteristics. Which one of the following is shared by non-living matter as well?

A Homeostasis

B Tissues

C Reproduction

D Molecules

Q24: The foundation for the germ theory of disease was set down by

A Robert Koch

B Ronald Ross

C Louis Pasteur

D Walter Reed

Q25: The five-kingdom system of classification was set up by

A Louis Pasteur

B Robert Whittaker

C Robert Koch

D Masaki Ogata

Q26: The idea of selective toxicity was first proposed by

A Antony van Leeuwenhoek

B Paul Ehrlich

C Louis Pasteur

D Alexander Fleming

Q27: The first organism in most natural food chains is

A a herbivore

B a decomposer

C photosynthetic

D carnivorous

Q28: All of the following are features of prokaryotes except

A nitrogen fixation

B photosynthesis

C sexual reproduction

D locomotion

Q29: Mycoplasmas are different from the other prokaryotes by

A presence of chitin in cell walls

B presence of murrain in cell walls

C presence of proteins in cell walls

D absence of cell wall itself

Q30: Which of the following microorganisms is classified as a member of archaebacteria?

A Gyanobacteria

B Methanobacteria

C Trichomonads

D Mycoplasma

Q31: Cell theory includes all of the following except

A all organisms are composed of one or more cells

B the cell is the most primitive form of life

C the cell is the structural unit of life

D cells arise by division of preexisting cells

Q32: Who discovered the bacteria that cause cholera?

A Pierre Berthelot

B Robert Koch

C Louis Pasteur

D Rudolf Virchow

Q33: A characteristic of protein synthesis in both the archaea and eukarya is

A transcription and translation are coupled

B translation is inhibited by diphtheria toxin

C proteins are synthesized from D-, rather than L-, isomers of amino acids

D the initiator tRNA is charged with N-formyl-methionine

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