Biological Classification Test

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Biological Classification Test - 75

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Question 1
1 / -0

Cells of many protistans, plants, and fungi, but not animals, commonly have

A
Cell wall

B
Ribosomes

C
Plasma membrane

D
Mitochondria
Solution
- The cell wall is a structural layer outside the cell membrane, which provides the cell with structural support and protection and is found in algae, fungi, plants, bacteria, and archaea, but not animals.
- Ribosomes are minute particles with associated proteins and RNA to synthesize proteins and they can be found floating in the cytoplasm or attached to the endoplasmic reticulum. Ribosomes are present in both prokaryotic and eukaryotic cells.
- The plasma membrane is composed of a phospholipid bilayer arranged back to back and covered in cholesterol and protein molecules. Plasma membrane is present in all living cells.
- Mitochondria are rod-shaped organelles, considered the power generators of the cell which convert nutrients and oxygen into ATP. They are not present in bacteria.
Hence, the correct answer is 'cell wall'
Question 2
1 / -0

Choose the correct answers from the alternatives given..
Which one of the following is neither a prokaryote nor an eukaryote ?

A
Virus

B
E. ccli

C
Yeast

D
Cyanobacteria

Solution

Viruses are the only organisms which are neither prokaryotic nor eukaryotic as don't have a nucleus, completely ruling out the potential of them being classified as eukaryotic. While they don’t have there own mechanism of metabolism
they are unable to independently reproduce without using the host cell or the usual method of cell division. So the correct option is 'Virus'.
Question 3
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Which of the following kingdoms is mismatched?

A
Protista - various modes of nutrition

B
Animalia - rarely ingestive

C
Plantae - usually photosynthetic

D
Fungi - usually saprotrophic

Solution

The five-kingdom system of classification for living organisms, including the prokaryotic Monera and the eukaryotic Protista, Fungi, Plantae, and Animalia is complicated by the discovery of archaebacteria.
So, the correct option is 'Animaliararely ingestive'.
Question 4
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Which one of the following is not true about organisms included in the kingdom Monera?

A
They reproduce by mitosis

B
They originated at least 3.5 billion years ago

C
They have prokaryotic cellular organisation

D
Most have cell walls

Solution

Kingdom Monera primarily consist the prokaryotes, which are able to reproduce through the process of binary fission. It means that a cell replicates its DNA and then divides into two identical cells.
Hence, the correct answer is 'They reproduce by mitosis'.
Question 5
1 / -0

Choose the correct answers from the alternatives given.
Which one of the following living phenomena is absent in viruses?

A
Mutation

B
Replication

C
Production of energy

D
None of these

Solution

C. Production of energy
Solution : Viruses are too small and too simple to produce energy. They do not have any physiological system to produce energy. If they have, they would be free living and would be considered as a complete living organism. They undergo replication and mutation more than any other organism.
So the correct answer is "Production of energy".
Question 6
1 / -0

Kingdom monera belongs to _______.

A
Free-living organisms

B
Parasites

C
Nitrogen-fixers

D
All of these
Solution
Some of the bacteria (e.g., Cyanobacteria) who can produce their own food, are free living.
Some bacteria (e.g. Azotobacter) can convert atmospheric nitrogen into inorganic nitrogenous compounds and fix them into soil.
Some bacteria (e.g. Salmonella) are parasitic in nature. They causes diseases in humans, birds, plants, animals etc.
So the correct answer is "All of these".
Question 7
1 / -0

Choose the correct answers from the alternatives given.
Which of the following groups of components is found in all viruses?

A
Envelope, nucleic acid, capsid

B
DNA, RNA and proteins

C
Proteins and a nucleic acid

D
Proteins, nucleic acids, carbohydrates, and lipids
Solution
- Generally, plant viruses are single-stranded RNA viruses.
- Bacteriophages are generally double-stranded DNA viruses.
- The protein coat of the virus is called Capsid made of small subunits called Capsomeres. These capsomeres are arranged in helical or polyhedral geometric forms.
Hence, the correct answer is 'proteins and a nucleic acid'.
Question 8
1 / -0

Choose the correct answers from the alternatives given.
Facultative anaerobes:

A
require a constant supply of oxygen

B
are killed in an oxygenated environment

C
do not always need oxygen

D
are photosynthetic but do not give off oxygen

Solution

A facultative anaerobe is an organism that makes ATP by aerobic respiration if oxygen is present, but is capable of switching to respiration if oxygen is absent.
So, the correct option is 'do not always need oxygen'.
Question 9
1 / -0

Choose the correct answers from the alternatives given.
Which bacteria produces methane as byproduct

A
Green sulphur

B
Methanogens

C
Blue-greens

D
Rickettsias

Solution

Methanogens are microorganisms that produce methane as a metabolic byproduct in hypoxic conditions. So the correct option is 'Methanogens'.
Question 10
1 / -0

Choose the correct answers from the alternatives given.
An asexual spore produced by a sac fungus is called

A
conidium

B
ascospore

C
basidiospore

D
hypha

Solution

Conidium is a type of asexual reproductive spore of fungi which takes place at the tip or side of hyphae or on special spore-producing structures called conidiophores.
So the correct option is 'conidium.'

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Re-Attempt Weekly Quiz Competition

Biological Classification Test - 75

Result

Biological Classification Test - 75

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SHARING IS CARING

Question 1

Cell wall

Ribosomes

Plasma membrane

Mitochondria

Solution

Question 2

Virus

E. ccli

Yeast

Cyanobacteria

Solution

Question 3

Protista - various modes of nutrition

Animalia - rarely ingestive

Plantae - usually photosynthetic

Fungi - usually saprotrophic

Solution

Question 4

They reproduce by mitosis

They originated at least 3.5 billion years ago

They have prokaryotic cellular organisation

Most have cell walls

Solution

Question 5

Mutation

Replication

Production of energy

None of these

Solution

Question 6

Free-living organisms

Parasites

Nitrogen-fixers

All of these

Solution

Question 7

Envelope, nucleic acid, capsid

DNA, RNA and proteins

Proteins and a nucleic acid

Proteins, nucleic acids, carbohydrates, and lipids

Solution

Question 8

require a constant supply of oxygen

are killed in an oxygenated environment

do not always need oxygen

are photosynthetic but do not give off oxygen

Solution

Question 9

Green sulphur

Methanogens

Blue-greens

Rickettsias

Solution

Question 10

conidium

ascospore

basidiospore

hypha

Solution

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