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Kingdom-Monera and Viruses

Total questions: 60

Worksheet time: 30mins

Name
Class
Date
1.

Which of the following are found in extreme saline conditions?

a)

Archaebacteria

b)

Eubacteria

c)

Cyanpbacteria

d)

Mycobacteria

2.

Viroids differ from viruses in having

a)

DNA molecules with protein coat

b)

DNA molecules without protein coat

c)

RNA molecules with protein coat

d)

RNA molecules without protein coat

3.

Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen ?

a)

Bacillus

b)

Pseudomonas

c)

Mycoplasma

d)

Nostoc

4.

The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the

a)

thermoacidophiles

b)

methanogens

c)

eubacteria

d)

halophiles

5.

Which of the following statements is wrong for viroids ?

a)

They are smaller then viruses

b)

They cause infections

c)

Their RNA is of high molecular weight

d)

They lack a protein coat

6.

Which one of the following statements is wrong ?

a)

Golden algae are also called desmids

b)

Eubacteria are also called false bacteria

c)

Phycomycetes are also called algal fungi

d)

Cyanobacteria are also called blue-green algae

7.

Methanogens belong to

a)

eubacteria

b)

archaebacteria

c)

dinoflagellates

d)

slime moulds

8.

Chromatophores take part in

a)

photosynthesis

b)

growth

c)

movemenet

d)

respiration

9.

Select wrong statement.

a)

the viroids were discovered by DJ Ivanowski

b)

WM Stanley showed that viruses could be crystallised

c)

The term 'Contagium vivum fluidum' was coined by WM Beijerinek

d)

Mosaic disease in tobacco and AIDS in human being are caused by viruses

10.

The structures that help some bacteria to attach to rocks and/or host tissues are

a)

rhizoids

b)

fimbriae

c)

mesosomes

d)

holdfast

11.

Archaebacteria differ from eubacteria in

a)

cell membrane structure

b)

mode of nutrition

c)

cell shape

d)

mode of reproduction

12.

Which of the following shows coiled RNA strand and capsomeres ?

a)

Polio virus

b)

Tobacco mosaic virus

c)

measles virus

d)

Retrovirus

13.

Pigment-containing membranous extensions in some cyanobacteria are

a)

heterocysts

b)

basal bodies

c)

pneumatophores

d)

chromatophores

14.

Which of the following are likely to be present in deep sea water ?

a)

Archaebacteria

b)

Eubacteria

c)

Blue-green algae

d)

Saprophytic fungi

15.

The Cyanobacteria are also referred to as

a)

protists

b)

golden algae

c)

slime moulds

d)

blue-green algae

16.

Which statement is wrong for viruses ?

a)

All are parasites

b)

All of them have helical symmetry

c)

They have ability to synthesise nucleic acids and proteins

d)

Antibiotics have no effect on them

17.

Nuclear membrane is absent in

a)

penicillium

b)

Agaricus

c)

Volvox

d)

Nostoc

18.

Maximum nutritional diversity is found in the group

a)

Fungi

b)

Animalia

c)

Monera

d)

Plantae

19.

In eubacteria, a cellular component that resembles eukaryotic cells is

a)

nucleus

b)

ribosomes

c)

cell wall

d)

plasma membrane

20.

Organisms called methanogens are most abundant in a

a)

cattle yard

b)

polluted stream

c)

hot spring

d)

sulphur rock

21.

Virus envelope is known as

a)

capsid

b)

Virion

c)

nucleoprotein

d)

core

22.

some hyperthermophilic organisms that grow in highly acidic habitats belong to the two groups called

a)

eubacteria and archaea

b)

cyanobacteria and diatoms

c)

protists and mosses

d)

liverworts and yeasts

23.

TO Diener discovered a

a)

free infectious RNA

b)

free infectious DNA

c)

infectious protein

d)

bacteriophage

24.

Thermococcus, Methanococcus and Methanobacterium exemplify

a)

archaebacteria that contain protein homologous to eukaryotic core histones

b)

archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoilded

c)

bacteria whose DNA is relaxed or positively supercoilded but which have a cytoskeleton and as well as mitochondira

d)

bacteria that contain a cytoskeleton and ribosomes

25.

Bacterial leaf blight of rice is caused by a species of

a)

Xanthomonas

b)

Pseudomonas

c)

Alternaria

d)

Erwinia

26.

Which one of the following statements about Mycoplasma is wrong ?

a)

They are also called PPLO

b)

They are pleomorphic

c)

They are sensitive to penicillin

d)

They cause disease in plants

27.

Barophillic prokaryotes

a)

grow slowly in highly alkaline frozen takes at high altitudes

b)

occur in water containing high concentrations of barium hydroxide

c)

grow and multiply in very deep marine sediments

d)

readily grown ans divides in sea water enriched in any soluble salt of barium

28.

Viruses that infect bacteria, multiply and cause their Lysis are called

a)

Iysozymes

b)

Iytic

c)

lipolytic

d)

Iysogenic

29.

which of the following statements is not true for retroviruses ?

a)

DNA is not present at any stage in the life cycle of retroviruses

b)

Retroviruses carry gene for RNA dependent DNA polymerase

c)

The genetic material in mature retroviruses is RNA

d)

Retroviruses are causative agents for certain kinds of cancer in man

30.

Viruses are no more 'alive' than isolated chromosomes because

a)

both require the environment of a cell to replicate

b)

they require both RNA and DNA

c)

they both need food molecules

d)

they both require oxygen for respiration

31.

Which one of the following statements about viruses is correct ?

a)

Nucleic acid of viruses is known as capsid

b)

Viruses possess their won metabolic system

c)

All viruses contain both RNA and DNA

d)

Viruses are obligate parasites

32.

Chromosomes in a bacterial cell can be 1-3 in number and

a)

can be circular as well as linear within the same cell

b)

are always circular

c)

are always linear

d)

can be either circular of linear, but never both within the same cell

33.

Tobacco mosaic virus is a tubular filament of size

a)

700 x 30 nm

b)

300 x 10 nm

c)

300 x 5 nm

d)

300 x 18 nm

34.

Organisms which obtain energy by the oxidation of reduced inorganic compounds are called

a)

homoautotrophs

b)

chemoautotrophs

c)

saprozoic

d)

coproheterotrophs

35.

In bacteria, plasmid is

a)

extra-chromosomal material

b)

main DNA

c)

non-functional DNA

d)

repetitive gene

36.

Plasmid is

a)

Fragment of DNA which acts as vector

b)

fragment which joins two genes

c)

mRNA which acts as carrier

d)

autotrophic fragment

37.

Interferons are synthesised in response to

a)

Mycoplasma

b)

bacteria

c)

Viruses

d)

fungi

38.

What is true archaebacteria ?

a)

All Halophiles

b)

All photosyntheitc

c)

All fossils

d)

Oldest living beings

39.

Cauliflower mosaic virus contains

a)

ssRNA

b)

dsRNA

c)

dsDNA

d)

ssDNA

40.

What is true for cyanobacteria ?

a)

Oxygenic with nitrogenase

b)

Oxygenic without nitorgenase

c)

Non-Oxygenic with nitrognase

d)

Non-Oxygenic without nitrogenase

41.

What is true for photolithotrophs?

a)

Obtain energy from radiations and hydrogen from organic compounds

b)

Obtain energy from radiations and hydrogen from inorganic compounds

c)

Obtain energy from organic compounds

d)

Obtain energy from inorganic compounds

42.

Small protein produced by vertebrate cells naturally in response to viral infection and which inhibit multiplication of viruses are called

a)

immunoglobulins

b)

interferons

c)

antitoxins

d)

lipoproteins

43.

Photosynthetic bacteria have pigments in

a)

leucoplasts

b)

chloroplasts

c)

chromoplasts

d)

chromatophores

44.

A few organisms are known to grow and multiply at temperatures of 100 - 105oC. They belong to

a)

Marine archebacteria

b)

Thermophilic sulphur bacteria

c)

hot-spring blue-green algae (cyanobacteria)

d)

thermophilic, subaerial fungi

45.

The main role of bacteria in the carbon cycle involves

a)

photosythesis

b)

chemosynthesis

c)

digestion or breakdown of organic compounds

d)

assimilation of nitrogenous compounds

46.

The hereditary material present in the bacterium Escherischi coli is

a)

single stranded DNA

b)

deoxyribose sugar

c)

double stranded DNA

d)

single stranded RNA

47.

Which one of the following statements about viruses is correct ?

a)

Viruses possess their own metabolic system

b)

Viruses contain either DNA or RNA

c)

Viruses are facultative parasites

d)

Viruses are readily killed by antibiotics

48.

The site of respiration in bacteria is

a)

episome

b)

mesosome

c)

ribosome

d)

microsome

49.

Influenza virus has

a)

DNA

b)

RNA

c)

Both (a) and (b)

d)

Only proteins and no nucleic acids

50.

IN bacterial chromosomes, the nucleic acid polymers are

a)

linear DNA molecule

b)

Circular DNA molecule

c)

of two types - DNA and RNA

d)

linear RNA molecule

51.

Sex factor in bacteria is

a)

chromosomal replicon

b)

F -replicon

c)

RNA

d)

sex-pilus

52.

Interferons are

a)

antiviral proteins

b)

antibacterial proteins

c)

anticancer proteins

d)

complex proteins

53.

The plasmid

a)

help in respiration

b)

genes found inside nucleus

c)

is a component of cell wall of bacteria

d)

is the genetic part in addition to DNA in microorganisms

54.

Tobacco Mosaic Virus (TMV) genes are

a)

double stranded RNA

b)

single stranded RNA

c)

polyribouncleotides

d)

proteinaceous

55.

Temperature tolerance of thermal blue-green algae is due to

a)

Cell wall structure

b)

cell organisation

c)

mitochondrial structure

d)

homopolar bonds in their proteins

56.

Escherichia coli is used extensively in biological research as it is

a)

easily cultured

b)

easily availbale

c)

easy to handle

d)

easily multiplied in host

57.

Genophore bacterial genome or nucleoid is made of

a)

histones and non-histones

b)

RNA and histones

c)

a single double stranded DNA

d)

a single stranded DNA

58.

Bacteria lack alternation of generation because there is

a)

neither syngamy nor reducation division

b)

distinct chromosomes are absent

c)

no conjugation

d)

no exchange of genetic material

59.

The main difference in Gram (+)ve abd Gram (-)ve bacteria resides in their

a)

Cell Well

b)

Cell membrance

c)

Cytoplasm

d)

flagella

60.

Which one belongs to the Monera ?

a)

Amoeba

b)

Escherichia

c)

Gelidium

d)

spirogyra

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