Tag: bacteria
Questions Related to bacteria
What are the major groups of microorganisms?
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Bacteria, fungi
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Protozoa, algae
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Bacteria, fungi, protozoa, algae and virus.
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Fungi, algae and virus
Microorganisms are the organisms that we cannot see by our naked eyes. It can be prokaryotic unicellular like bacteria, eukaryotic unicellular like protozoa, eukaryotic multicellular like fungi and algae and even acellular like viruses.
Thus, the correct answer is option C.
Unicellular organisms are capable of (i) Independent existence (ii) Performing the essential functions of life
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Only I
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Only II
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Both A and B
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None of the above
Unicellular organisms are made up of a single cell and perform all the life processes for survival and independent existence. Hence, the cell is called as the fundamental structural and functional unit of life.
Escherichia colt has the following combination of characters.
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Rod shaped, 1-3$\mu $m long, gram negative
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Rod shaped, 1- 3$\mu $m long, gram positive
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Spiral, 1-3$\mu $m long, gram negative
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Spiral, 1-3$\mu $m long, gram positive
Binary fission in Amoeba involves ____________.
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Amitosis
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Mitosis
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Meiosis
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None of these
The reproduction in amoeba is asexual, called binary fission, where it replicated its cells by mitosis and its cell divide in two equal daughter cells. Amitosis is similar to binary fission. Meiosis does not take place in amoeba.
The correct answer is B.
Torula condition' occurs in ________.
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Rhizopus
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Ulothrix
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Spirogyra
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Riccia
Amoeba takes food through ____________.
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Phagocytosis
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Pinocytosis
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Endocytosis
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All the above
Amoeba takes its food by the method of phagocytosis (i.e ingesting or engulfing the food particles), also by means of pinocytosis (wherein amoeba wraps around its membranes around the food forms vesicles and pinch it inside the membrane and then gradually digests it) and by endocytosis (in which the outermost the membrane of amoeba either stretches inwards or projects outwards to obtain nutrition.
The correct answer is D.
Histological differentiation is absent in ____________.
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Amoeba
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Hydra
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Cockroach
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Earthworm
Which of the following is a photo-autotrophic bacterium
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Rhodospirillum
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Azospirillum
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NitrosomonasV
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Nitrobacter
Rhodospirillum bacteria is facultative aerobic Photo - autotrophic bacteria use non-sulphur aliphatic organic compound as donor of $H _{2}$ go,. Propyl alcohol .
$6CO _{2}+12CH _{3}CHOHCH _{3}\overset{Light}{\rightarrow}$
$C _{6}H _{12}O _{6}+12CH _{3}COH _{3}+6H _{2}O$
In Amoeba, the cell division takes place ____
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Involving changes in the chromatin reticulum
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Without involving changes in the chromatin reticulum
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Leading to reduction in the number of chromosomes
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Without dividing the nucleus
Ageing is slow or absent in
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Plants
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Parrot
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Monkeys
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Hydra
The ageing is very slow or is not seen with the human eye in unicellular organisms but they do age. They undergo constant spontaneous DNA damage that can lead to the death of cells when it no longer able to reproduce. Plants and parrot are multicellular organisms with the higher level of complexity. The complexity is such that cell divisions are limited and when the cell is not able to divide, it ages with the decay of organelles and finally dies. So these organisms do age and die after a perticular period of time. but Hydra is the only species that does not age and lose its capability to reproduce. So we can say that ageing is slow or absent in hydra.