Biological Classification Test

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Biological Classification Test - 82

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Weekly Quiz Competition

Question 1
1 / -0

Approximately how many cells are present in the body of an adult person?

A
$$10^{14}$$

B
$$10^{15}$$

C
$$10^{18}$$

D
$$10^{21}$$

Solution

An adult human being has approximately 100 000 billion cells, all originating from a single cell, the fertilized egg cell.
So, the correct answer is option A
Question 2
1 / -0

Nervous system is affected by the shortage of.

A
Oxygen

B
Sulphur

C
Carbon

D
Sodium

Solution
Question 3
1 / -0

Select the correct sequence of events with respect to the fungal sexual cycle.

A
Karyogamy, plasmognmy and meiosis

B
Meiosis, plasmogamy and karyogamy

C
Plasmogamy, karyogamy and meiosis

D
Meiosis, karyogamy and plasmogamy

Solution

The sequences of events occur in a fungal sexual cycle
1. Plasmogamy- In plasmogamy, the cytoplasm of two cells fuses together without the fusion of nuclei. This process helps to bring the haploid nuclei in the same cell.
2. Karyogamy- It is the fusion of the nuclei. Karyogamy results in the formation of a zygote which is diploid.
3. Meiosis- After the formation of zygote, meiosis (reduction division) starts. After meiosis haploid stage of fungi gets established.
Thus the correct sequence of events is plasmogamy, karyogamy, and meiosis.
So, the correct option is 'Plasmogamy, karyogamy and meiosis'.
Question 4
1 / -0

George Bentham and J.D. Hooker divided dicots into

A
3 divisions

B
3 sub-divisions

C
2 sub-kingdoms

D
3 sub classes

Solution

Bentham and Hooker divided the Angiospermae into two classes: Dicotyledons and Monocotyledons and in between this they have placed Gymnosperms. Dicotyledons is again divided into three subclasses. They are Polypetalae, Gamopetale and Monochlamydeae. These sub classes are again divided into series. Series is again divided into order or cohort and order into family. So, the correct answer is '3 sub classes'.
Question 5
1 / -0

Respiratory enzymes are found associated with plasma membrane in:

A
Clostridium

B
Chlorella

C
Chara

D
Chlamydomonas

Solution

Prokaryotic cells lack membrane-bound organelles and the process of respiration occurs in the mesosome within the cytoplasm. The mesosome is created as the plasma membrane folds inward, and within this region are respiratory enzymes which function within an electron transport chain.
Thus Clostridium is the only prokaryote among the options given. Chlorella, Chara, and Chlamydomonas are algae and hence are eukaryotes.
So, the correct option is ' Clostridium'.
Question 6
1 / -0

In the life cycle of Ascomycetes and Basidomycetes cells in fruiting bodies are?

A
Monokaryotic and diploid (Ascus /Basidium )

B
Dikaryotic and haploid

C
Both

D
None
Question 7
1 / -0

Which of the following shows extensive metabolic diversity?

A
Humans

B
Fungi

C
Snakes

D
Blue - green algae

Solution

Cyanobacteria are considered to be metabolically diverse species as it can extract the energy from reduced form of carbohydrates such as sugar through a number of compounds as they have different organic or inorganic reduced electron compounds that act as oxidized inorganic molecules.

So, the correct option is 'Blue-green algae'.
Question 8
1 / -0

Read the following statements and find out the incorrect one.

A
Virus takes over the machinery of the host cell to replicate themself.

B
Virus contains both RNA and DNA.

C
AIDS in human is caused by a virus.

D
Generally in plant viruses, ss RNA is present.

Solution

A) The viruses are non-cellular organisms that are characterized by having an inert crystalline structure outside the living cell. Once they infect a cell they take over the machinery of the host cell to replicate themselves and kill the host.
B) A virus does not contain both RNA and DNA either they contain DNA as genetic material or RNA as genetic material.
C) AIDS is acquired immunodeficiency syndrome is an infection caused by the virus name HIV(human immunodeficiency virus). HIV is a retrovirus which use to attack on macrophages and T cells and uses their machinery to replicate which leads to destroying the host cells.
D) Generally, the viruses that infect plants have single-stranded RNA.
So the correct answer is 'Virus contains both RNA and DNA.'.
Question 9
1 / -0

Viruses are called obligate parasites because

A
Viruses must carry out their reproduction by parasitizing a host cell

B
They cannot multiply outside a living cell

C
They can only replicate inside of a specific host

D
All of the above

Solution

Virus, is a nucleoprotein entity which is able to utilize the synthetic machinery of a living cell of another organism for its multiplication which does not involve the growth and the division. Pasteur coined the term virus before its scientific discovery. The virus cannot grow on non living culture medium. It requires living cells for its metabolism and multiplication.
The virus is an obligate parasite as it is inert outside the host cell. An inert virus is called the Virion. A Biosynthetic machinery is absent. There is no system to liberate energy. A virus does not grow. It does not divide or reproduce like typical organisms without host machinery.
It multiplies by independent formation of its parts using host machinery and then assembly of parts to produce virus particles. A virus lacks irritability and motility. It requires a vector for transfer from one host to another.
So the correct option is 'All of the above'.
Question 10
1 / -0

Which statements is wrong about lichens?

A
Some species are eaten by reindeers

B
Lichens are indicators of pollutions

C
They grow rapidly about 2 cm per day

D
They have algal and fungal partners in their thallus

Solution

Lichen is a symbiotic partnership between fungus and alga. It has algal and fungal partners in its thallus. In this, the fungus is a dominant partner. Hence, lichen has majority of characteristics of fungus. It absorbs sulphur dioxide from the atmosphere. Hence, it is widely used as indicator of air pollution. It grows very slowly. It is eaten by snails, squirrels and some species of monkeys and reindeers during winter. They grow at 1 mm per day.
Thus, the correct answer is 'They grow rapidly about 2 cm per day.'

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Biological Classification Test - 82

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Biological Classification Test - 82

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SHARING IS CARING

Question 1

$$10^{14}$$

$$10^{15}$$

$$10^{18}$$

$$10^{21}$$

Solution

Question 2

Oxygen

Sulphur

Carbon

Sodium

Solution

Question 3

Karyogamy, plasmognmy and meiosis

Meiosis, plasmogamy and karyogamy

Plasmogamy, karyogamy and meiosis

Meiosis, karyogamy and plasmogamy

Solution

Question 4

3 divisions

3 sub-divisions

2 sub-kingdoms

3 sub classes

Solution

Question 5

Clostridium

Chlorella

Chara

Chlamydomonas

Solution

Question 6

Monokaryotic and diploid (Ascus /Basidium )

Dikaryotic and haploid

Both

None

Question 7

Humans

Fungi

Snakes

Blue - green algae

Solution

Question 8

Virus takes over the machinery of the host cell to replicate themself.

Virus contains both RNA and DNA.

AIDS in human is caused by a virus.

Generally in plant viruses, ss RNA is present.

Solution

Question 9

Viruses must carry out their reproduction by parasitizing a host cell

They cannot multiply outside a living cell

They can only replicate inside of a specific host

All of the above

Solution

Question 10

Some species are eaten by reindeers

Lichens are indicators of pollutions

They grow rapidly about 2 cm per day

They have algal and fungal partners in their thallus

Solution

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