Biological Classification Test

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Biological Classification Test - 97

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Weekly Quiz Competition

Question 1
1 / -0

Match the lists.
I II
(a) Corynebacterium glutamicum $$(1)$$ Flexibility in shape
(b) Halobacterium $$(2)$$ Mineralisation
(c) Cristispira $$(3)$$ Lysine
(d) Bacillus mycoides $$(4)$$ Gas vacuoles
$$(5)$$ Parasite on bacteria

A
$$a-5, b-2, c-3, d-4$$

B
$$a-3, b-4, c-1, d-2$$

C
$$a-2, b-5, c-4, d-1$$

D
$$a-4, b-1, c-3, d-5$$

Solution

Corynebacterium glutamicum is a gram-positive soil bacterium. Through its metabolism, it synthesizes products such as serine, glutamate, and lysine - amino acids.
Question 2
1 / -0

Which of the following has peritrichous flagella?

A
Pseudomonas

B
Bacillus typhosus

C
Spirillium

D
Vibrio

Solution

There are four types of flagellar arrangements based on the number and placement of flagella on the cell. These are,
1. Monotrichous - A single flagellum extends from one end of the cell. Example includes Vibrio cholerae.
2. Amphitrichous - A single flagellum or multiple flagella extend from two ends of the cell. Examples include Alkaligens faecalis.
3. Lophotrichous - Tuft of flagella extend from one end or both ends of the cell. Examples include Spirillum.
4. Peritrichous - Multiple flagella randomly distributed over the entire bacterial cell. Example includes Bacillus typhosus.
Thus, the correct answer is 'Bacillus typhosus.'
Question 3
1 / -0

Select the correct combination of statements (a-d) regarding the characteristics of certain organisms.
(a) Methanogens are archaebacteria which produce methane in marshy areas.
(b) Nostoc is a filamentous blue-green alga which fixes atmospheric nitrogen.
(c) Chemosynthetic autotrophic bacteria synthesize cellulose from glucose.
(d) Mycoplasma lacks a cell wall and can survive without oxygen.
The correct statements are

A
b, c

B
a, b, c

C
b, c, d

D
a, b, d

Solution

Methonogens belongs to Archaebacteria group. They produce methane gas in marshy areas. They produce biogas. Nostoc are filamentous Blue-green algae. They are capable of converting atmospheric nitrogen into ammonium compounds and make it available to plants. Chemosynthetic autotrophic bacteria use inorganic molecules as a source of energy and convert them into organic substances. Mycoplasma are the smallest bacteria. They do not have cell wall around nuclear membrane. They can survive in anaerobic condition.
Thus, the correct answer is 'a, b, d.'
Question 4
1 / -0

Ruminococcus is a

A
Eubacterium

B
Halophile

C
Chemolithotroph

D
Methanogen

Solution

Ruminococcus is a genus of bacteria in the class Clostridia. It is anaerobic, Gram-positive Eubacterium. It is found in the intestines of humans. It is capable of cellulose degradation.
Thus, the correct answer is 'Eubacterium.'
Question 5
1 / -0

Water of river Ganges remains 'pure' due to presence of _______

A
Bacteriophages

B
Zooplankton

C
Bdellovibrios

D
Dinoflagellates

Solution
Question 6
1 / -0

Scrapie of shee and Cruetzfeldt-Jacob nervous disease of humans are caused by _________

A
Prions

B
Viroids

C
RNA-viruses

D
DNA-viruses

Solution

Option (A) is the right answer.

Scrapie of sheep and cruetzfeldt-Jacob nervous disease of humans are caused by prions.
Scrapie is a fatal degenerative disease that affects the nervous system of sheeps and goats.
It is one of the most several transmissible spongiform encaphalopathies(TSES) and as such its target to be caused by a prion.
Question 7
1 / -0

Methanogens belong to

A
Slime moulds

B
Eubacteria

C
Archaebacteria

D
Dinoflagellates.

Solution

Methanogens belong to archaebacteria. They are strict anaerobes. They are autotrophs which obtain both energy and carbon from decomposition products. They occur in marshy areas where they convert formic acid and carbon dioxide into methane with the help of hydrogen. This capability is commercially exploited in the production of methane and fuel gas inside gobar gas plants, e.g., Methanobacterium, Methanococcus. Some of the methanogens live as symbionts inside rumen of herbivorous animals that chew their cud. These archaebacteria are helpful to the ruminants in fermentation of celullose.
Question 8
1 / -0

During unfavourable conditions slime molds form spores which are survival for a long time, spore dispersal take place by

A
Water currents

B
Air currents

C
Insects

D
None of these
Solution
- Slime moulds are Saprophytic Protists.
- They move along decaying twigs and leaves engulfing organic material.
- Under a suitable condition, they form aggregation called Plasmodium.
- During unfavourable condition, the plasmodium differentiates and form fruiting bodies bearing spores at their tips.
- The spores possess true walls.
- They are extremely resistant and survive for many years even under adverse conditions.
- The spores are dispersed by air currents.
- So, the correct answer is 'Air currents'.
Question 9
1 / -0

Thermococcus, Methanococcus and Methanobacterium are

A
Archaebacteria having eukaryotic histone homologue

B
Bacteria with cytoskeleton

C
Archaebacteria with negatively supercoiled DNA as in eukaryotes but lacking histones.

D
Bacteria with positively coiled DNA, cytoskeleton and mitochondria.

Solution

Thermococcus, Methanococcus and Methanobacterium are Archaebacteria. They lack histones. They have negatively supercoiled DNA. They differ from bacteria in a way that they survive extreme conditions. Unlike bacteria, archaea cell walls do not contain peptidoglycan.
Thus, the correct answer is option C.

Question 10

1 / -0

Asexual and sexual spores found in fungi respectively are.

Conidia & Zoospores

Oospores & Ascospores

Sporangiospores & basidiospores

Ascospores & basidiospores

Solution

Name of spores	Type of spores
Conidia & Zoospores	Both are asexual spores
Oospores & Ascospores	Both are sexual spores
Sporangiospores & basidiospores	Asexual & sexual
Ascospores & basidiospores	Both are sexual spores

So, the correct answer is ' Sporangiospores & basidiospores

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Re-Attempt Weekly Quiz Competition

	I		II
(a)	Corynebacterium glutamicum	$$(1)$$	Flexibility in shape
(b)	Halobacterium	$$(2)$$	Mineralisation
(c)	Cristispira	$$(3)$$	Lysine
(d)	Bacillus mycoides	$$(4)$$	Gas vacuoles
		$$(5)$$	Parasite on bacteria

Biological Classification Test - 97

Result

Biological Classification Test - 97

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SHARING IS CARING

Question 1

$$a-5, b-2, c-3, d-4$$

$$a-3, b-4, c-1, d-2$$

$$a-2, b-5, c-4, d-1$$

$$a-4, b-1, c-3, d-5$$

Solution

Question 2

Pseudomonas

Bacillus typhosus

Spirillium

Vibrio

Solution

Question 3

b, c

a, b, c

b, c, d

a, b, d

Solution

Question 4

Eubacterium

Halophile

Chemolithotroph

Methanogen

Solution

Question 5

Bacteriophages

Zooplankton

Bdellovibrios

Dinoflagellates

Solution

Question 6

Prions

Viroids

RNA-viruses

DNA-viruses

Solution

Question 7

Slime moulds

Eubacteria

Archaebacteria

Dinoflagellates.

Solution

Question 8

Water currents

Air currents

Insects

None of these

Solution

Question 9

Archaebacteria having eukaryotic histone homologue

Bacteria with cytoskeleton

Archaebacteria with negatively supercoiled DNA as in eukaryotes but lacking histones.

Bacteria with positively coiled DNA, cytoskeleton and mitochondria.

Solution

Question 10

Conidia & Zoospores

Oospores & Ascospores

Sporangiospores & basidiospores

Ascospores & basidiospores

Solution

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