The Fundamental Unit of Life Test

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The Fundamental Unit of Life Test - 24

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Question 1
1 / -0

Nucleolemma is a part of

A
Nuclear membrane

B
Nuclear reticulum

C
Nucleolus

D
Nucleoplasm

Solution

Nucleo-lemma is a term used in parallel with plasma-lemma. The nucleo-lemma is a part of the nuclear membrane. The outer membrane may have ribosomes and interconnections with ER. Nuclear membrane has a large number of pores for the nucleo-cytoplasmic exchange of materials.
Hence the correct option is A.
Question 2
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Which of the following parts of a cell is non-living?

A
Centriole

B
Vacuole

C
Ribosomes

D
Mitochondria
Solution
- The living organelles are those that have protoplasm in them and carry out various metabolic activities within the cell.
- The cytoplasm and the nucleus together are known as the protoplasm and is the living matter of the cell.
- Organelles that are considered to be the living part of the cell are the mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes etc.
- The matrix of these organelles contains living matter and takes part in various metabolic reactions.
- While the vacuole is a part of a cell that is empty of cytoplasm, which makes the vacuole a non-living organelle.
So, the correct answer is option B.
Question 3
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In a eukaryotic cell, the nucleus has:

A
One membrane with pores

B
Two membranes with pores

C
Two membranes with pores through which substances do not pass

D
Two membranes with pores through which macromolecules may pass

Solution

In a eukaryotic cell. the nucleus is a defined central region. It is enveloped by a nuclear membrane which is made up of two layers. This membrane has a large number of pores (having a diameter of 200-800 angstroms). The pores facilitate the movement of substances between nucleus and cytoplasm.
Hence, the correct option is D.
Question 4
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Who showed that the nuclear membrane has many pores or circular structures or annuli?

A
Fawcell

B
Strasburger

C
Butchen

D
Callan and Tomlin

Solution

The nucleus is surrounded by a double membrane bearing many pores. These pores are important for cytoplasm-nucleoplasm communication and exchange of materials. Nuclear pores have diaphragms, septa annuli, microspores for movement of substances between nucleus and cytoplasm. The nuclear pore complex was first described by Callan and Tomlin.
Question 5
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Well defined nucleus is absent in

A
Blue green algae

B
Diatoms

C
Algae

D
Yeast

Solution

Algae are a very large and diverse group of eukaryotic organisms, ranging from the microscopic unicellular Chlorella and the diatoms to giant multicellular kelps, the large brown alga. Diatoms are algae (most commonly known as phytoplanktons) with secondary chloroplasts derived from an endosymbiotic red alga. Yeats is also a eukaryote belonging to the kingdom Fungi. However, the Blue-green algae or Cyanobacteria is the most primitive photosynthetic bacteria (prokaryotic- the absence of well-defined nucleus) cell which is quite small and usually unicellular, though they often grow in colonies large enough to see.
Hence, the correct answer is option A.
Question 6
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Which of the following statements is not true for Nostoc?

A
It is prokaryotic

B
It is autotrophic

C
It is filamentous

D
It is macroscopic

Solution

Nostoc is a filamentous blue green alga or cyanobacteria. It is prokaryotic and microscopic.
So, the correct answer is 'It is macroscopic'.
Question 7
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The given figure represents a .......... cell.

A
Prokaryotic

B
Eukaryotic

C
Ambiguous

D
Data insufficient

Solution

The given diagram shows a well-defined nucleus at the center of the cell. This is a clear indication that it is a eukaryotic cell. A eukaryotic cell possesses a nucleus, which contains most of the genetic material of the cell. Prokaryotic cells are primitive cells. They do not have a well-defined membrane-bound nucleus.
Hence the correct option is B.
Question 8
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Read the following statements and write the appropriate term against each I

I control the functions of a cell. Who am I?

A
Neuron

B
Nucleus

C
Chloroplast

D
Mitochondria

Solution

Neuron carries signals between the brain and various parts of the body. The chloroplast is a type of plastid, which produces green coloured pigment. The chloroplast is involved in carrying out photosynthesis. It gives a green colour to leaves. Mitochondria produce the energy currency, i.e., ATPs of the cell. It is also called as a powerhouse of the cell as it provides energy currency to a cell.
Nucleus regulates all the cellular activities by controlling the enzymes required for cellular processes. Enzymes are proteins and protein synthesis is controlled by nucleus as mRNA required for protein synthesis is made from DNA, which is situated in the nucleus. Thus, the correct answer is option B.
Question 9
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Which among the following is correctly represented?

A
Cell $$\rightarrow$$ tissue $$\rightarrow$$ organ $$\rightarrow$$ organ system $$\rightarrow$$ organism

B
Organism $$\rightarrow$$ organ $$\rightarrow$$ organ system $$\rightarrow$$ tissue $$\rightarrow$$ cell

C
Cell $$\rightarrow$$ tissue $$\rightarrow$$ organ system $$\rightarrow$$ organism $$\rightarrow$$ organ

D
None of the above

Solution

Cells are called the structural and functional unit of life because all the living organisms are made up of cells and also all the functions taking place inside the body of organisms are performed by cells. A group of cells, which are structurally similar and or work together to perform a particular function are called tissue. The collection of such tissues, which are joined in a structural unit to perform a certain function is called an organ. An organ system is a group of organs that work together to perform one or more functions, e.g., heart, blood, and blood vessels work together as a circulatory system. Organ systems work together and carry out normal functions of life, which form an organism. Thus, the correct answer is option A.
Question 10
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Which cell organelle is called the 'Suicidal bag of the cell'?

A
Ribosome

B
Lysosome

C
Chloroplast

D
Mitochondria

Solution

Lysosomes are eukaryotic cell organelles. They are small vesicle-like bodies that contain hydrolytic enzymes for digesting foreign particles and dead organelles.
They are known as suicide bags of the cell because they undergo autolysis and burst open when the cell is damaged. Thus, they digest their own cell, causing the cell to die.
So, the correct option is B.

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The Fundamental Unit of Life Test - 24

Result

The Fundamental Unit of Life Test - 24

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SHARING IS CARING

Question 1

Nuclear membrane

Nuclear reticulum

Nucleolus

Nucleoplasm

Solution

Question 2

Centriole

Vacuole

Ribosomes

Mitochondria

Solution

Question 3

One membrane with pores

Two membranes with pores

Two membranes with pores through which substances do not pass

Two membranes with pores through which macromolecules may pass

Solution

Question 4

Fawcell

Strasburger

Butchen

Callan and Tomlin

Solution

Question 5

Blue green algae

Diatoms

Algae

Yeast

Solution

Question 6

It is prokaryotic

It is autotrophic

It is filamentous

It is macroscopic

Solution

Question 7

Prokaryotic

Eukaryotic

Ambiguous

Data insufficient

Solution

Question 8

Neuron

Nucleus

Chloroplast

Mitochondria

Solution

Question 9

Cell $$\rightarrow$$ tissue $$\rightarrow$$ organ $$\rightarrow$$ organ system $$\rightarrow$$ organism

Organism $$\rightarrow$$ organ $$\rightarrow$$ organ system $$\rightarrow$$ tissue $$\rightarrow$$ cell

Cell $$\rightarrow$$ tissue $$\rightarrow$$ organ system $$\rightarrow$$ organism $$\rightarrow$$ organ

None of the above

Solution

Question 10

Ribosome

Lysosome

Chloroplast

Mitochondria

Solution

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