Bacteria Test 3

Total Questions:50 Total Time: 75 Min

Remaining:

 

Questions 1 of 50

Question:Gram -ue and +ue bacteria have cell membrane made up of

Answers Choices:

Proteins and lipids

Cellulose

Fats

Chitin

Questions 2 of 50

Question:In bacteria

Answers Choices:

DNA is enclosed in nucleus

DNA is scattered

DNA is double stranded and ringed

None

Questions 3 of 50

Question:The chief component of bacterial cell wall is

Answers Choices:

Cellulose and chitin

Cellulose and pectin

Amino acids and polysaccharides

Cellulose and carbohydrates

Questions 4 of 50

Question:Nucleoid is present in

Answers Choices:

Bacteria

Virus

Slime moulds

Fungi

Questions 5 of 50

Question:What are episomes

Answers Choices:

Hereditary DNA of bacterial cell

Extrachromosomal hereditary material of bacteria associated with nucleoid

Modification of the cell membrane performing respiration

None of these

Questions 6 of 50

Question:Bacterial ribosomes are present

Answers Choices:

In cytoplasm

On endoplasmic reticulum

On nuclear membrane

None of these

Questions 7 of 50

Question:One of the following is not applicable to Escherichia coli

Answers Choices:

Transformation

Transduction

Flagella

Diploid

Questions 8 of 50

Question:Which one of the following organisms may respire in the absence of oxygen

Answers Choices:

Azotobacter

Clostridium

Rhizobium

Lactobacillus

Questions 9 of 50

Question:In bacteria the most resistant stage is

Answers Choices:

Capsuled vegetative cell

Newly divided cell

Endospore stage

Torula stage

Questions 10 of 50

Question:Pseudomonas citri Bacteria are made up of

Answers Choices:

Nucleic acid

Only proteins

Nucleic acid and proteins

Nucleosides

None of these

Questions 11 of 50

Question:Genes for antibiotic resistance are located in

Answers Choices:

Chromosome

Nucleus

Cell wall

Plasmid

Questions 12 of 50

Question:The cells of bacterium Staphylococcus remain arranged in the form of

Answers Choices:

Plate

Cube

Irregular cluster

Chain

Questions 13 of 50

Question:Bacteria obtaining energy from oxidation of inorganic substances are called

Answers Choices:

Chemolithotrophs

Photolithotrophs

Photo organotrophs

Chemo organotrophs

Questions 14 of 50

Question:A Dutch Scientist A.V. Leeuwenhoek discovered bacteria for first time in

Answers Choices:

Rain water

Soil

Air

Garden soil

Questions 15 of 50

Question:Which of the following does not evolve oxygen

Answers Choices:

Photosynthetic bacteria

Blue-green algae

Green algae

Autotrophic plants

Questions 16 of 50

Question:Under the optimum condition of temperature and nutrition most of the bacteria divide at the interval

Answers Choices:

24 hours

20 minutes

60 minutes

5 minutes

Questions 17 of 50

Question:Transformation experiments using Pneumococcus bacteria led to the hypothesis that

Answers Choices:

DNA is the genetic material

Bacteria have sexual reproduction

Chromosomes are made up of DNA

RNA is the transfer link

Questions 18 of 50

Question:The process in which viruses are involved in sexual reproduction of bacteria is called

Answers Choices:

Transduction

Transcription

Transformation

Translation

Questions 19 of 50

Question:Conjugation in bacteria was discovered by

Answers Choices:

Robert Koch

Schaudinn and Hoffmann

Lederberg and Tatum

Leeuwenhoek

Questions 20 of 50

Question:In bacteria, sexual conjugation is promoted by

Answers Choices:

F-factor

co-factor

F-factor

None of the above

Questions 21 of 50

Question:Sex factor in bacteria is

Answers Choices:

F-replicon

Chromosomal replicon

RNA

Sexpilis

Questions 22 of 50

Question:For the production of which of the following, the activity of the fungus or micro-organisms is not required

Answers Choices:

Casein

Paneer (Cheese)

Curd

Wine

Questions 23 of 50

Question:Curing of tea leaves is brought about by the activity of

Answers Choices:

Viruses

Fungi

Bacteria

Mycorrhiza

Questions 24 of 50

Question:Antibiotics are mostly obtained from

Answers Choices:

Bacteria (Actinomycetes)

Virus

Angiosperms

Fungi

Questions 25 of 50

Question:Which of the following red pigment is present in root nodules of bacteria

Answers Choices:

Phycoerythrin

Bacterio chlorophyll

Leg haemoglobin

Bacterio viridin

Questions 26 of 50

Question:Which of the following processes is performed only by bacteria

Answers Choices:

Ripening of cheese

Synthesis of antibiotics

Humus formation

Formation of vitamin 'K in the intestine

Questions 27 of 50

Question:Human symbiotic bacteria help in

Answers Choices:

Intake of meals

Digestion of meals

Excretion of digested meal

None of the above

Questions 28 of 50

Question:Which one of the following bacteria has potential for nitrogen fixation

Answers Choices:

Nitrosomonas

Nitrobacter

Nitrosococcus

Rhizobium

Questions 29 of 50

Question:Certain bacteria living in the soil poor in oxygen convert nitrates into nitrites and then to free nitrogen and such bacteria are termed as

Answers Choices:

Nitrogen fixing bacteria

Denitrifying bacteria

Ammonifying bacteria

Saprophytic bacteria

Questions 30 of 50

Question:Which of the following is a flowering plant with nodules containing filamentous nitrogen-fixing microorganism

Answers Choices:

Casuarina equisetifolia

Crotalaria juncea

Cycas reuoluta

Cicer arietinum

Questions 31 of 50

Question:All of the following statements concerning the actinomycetous filamentous soil bacterium Frankia are correct except that Frankia

Answers Choices:

Can induce root nodules on many plant species

Cannot fix nitrogen in the free-living state

Cannot fix specialized vesicles in which the nitrogenase is protected from oxygen by a chemical barrier involving triterpene hapanoids

Like Rhizobium, it usually infects its host plant through root hair deformation and stimulates cell proliferation in the host's cortex

Questions 32 of 50

Question:Milk is changed into curd by

Answers Choices:

Acetobactor aceti

Bacillus megatherium

Xanthomonas citri

None of these

Questions 33 of 50

Question:Syphilis is caused by

Answers Choices:

Treponema pallidum

Virus

Nostoc

All the above

Questions 34 of 50

Question:The Bacillus haemophilus causes

Answers Choices:

Influenza

Pneumonia

A form meningitis

Whooping cough

Questions 35 of 50

Question:Natural genetic engineer is

Answers Choices:

Bacillus subtilis

Pseudomonas sp.

Escherichia coli

Agrobacterium tumefaciens

Questions 36 of 50

Question:Tetanolysin is produced by

Answers Choices:

Mycobacterium laprae

Clostridium botulinum

Clostridium tetani

None of these

Questions 37 of 50

Question:Which of the species of mycoplasma causes human sterility

Answers Choices:

M. hominis

M. fermentans

Both (1) and (2)

None of these

Questions 38 of 50

Question:The outermost limiting layer of mycoplasma is made up of

Answers Choices:

Cell wall

Cell membrane

Mucilaginous sheath

Slime layer

Questions 39 of 50

Question:Size of PPLO is

Answers Choices:

0.10\(\mu \)to 0.15\(\mu \)

0.21\(\mu \) to 0.25\(\mu \)

0.01\(\mu \)to 0.08\(\mu \)

0.05\(\mu \)to 0.10\(\mu \)

Questions 40 of 50

Question:Prokaryota includes

Answers Choices:

Mycoplasma

Ulothrix

Fungi

Mycoplasma and blue-green algae

Questions 41 of 50

Question:Nostoc may form

Answers Choices:

Simple colony

Compound colony

Both 1 and 2

None of these

Questions 42 of 50

Question:Nostoc is named after

Answers Choices:

Fritsch

Smith

Vaucher

R.N.Singh

Questions 43 of 50

Question:Which of the following contains polyhedral bodies

Answers Choices:

Mycoplasma

Bacteria

Nostoc

None of these

Questions 44 of 50

Question:Which of the following may be called as fission algae

Answers Choices:

Nostoc

Oedogonium

Volvox

None of these

Questions 45 of 50

Question:Atmospheric nitrogen-fixation is carried on by

Answers Choices:

Funaria

Anabaena

Chlamydomonas

Fern gametophyte

Questions 46 of 50

Question:Which is not true for the heterocyst of Nostoc

Answers Choices:

Intercalary position

Site of nitrogen fixation

Presence of polar nodules

\(C{O_2}\) fixation ability

Questions 47 of 50

Question:Which is not a cyanobacterium

Answers Choices:

Lyngbya

Plectonema

Anabaena

Sinorhizobium

Questions 48 of 50

Question:Which of the following is a Prokaryote

Answers Choices:

Chloreua

Chlamydomonas

Protomyces

Oscillatoria

Questions 49 of 50

Question:The most primitive in the following are

Answers Choices:

Cyanobacteria

Bryophytes

Gymnosperms

Monocots

Questions 50 of 50

Question:Auxospores and hormocysts are formed respectively, by

Answers Choices:

Some diatoms and several cyanobacteria

Some cyanobacteria and many diatoms

Several cyanobacteria and several diatoms

Several diatoms and a few cyanobacteria