Tag: multicellular organisms

Questions Related to multicellular organisms

Match the following:
A                                                                                B
A. Barr body                             1   Gives a grey colour to the
                                                          cell body
B. Purkinje cells                       2. Condudion muscles of
                                                        heart.

C. Nissl bodies                           3. Present in neurilemma
D. Schwann cell                          4. Certain neurons having
                                                           flask shaped cylons.

E. Purkinje fibres                          5. Found in cylons of female.
The correct pairing is.

botany caskets of life the cell structure multicellular organisms number and shape of cells

  1. 5, 4, 1, 3, 2

  2. 3, 2, 5, 1, 4

  3. 5, 2, 1, 3, 4

  4. 4, 3, 2, 5, 1

Show answer
Correct Option: A

Few genes are found in all types cells

of differentiated multicellular organisms of high

class. It is called

botany caskets of life the cell structure multicellular organisms number and shape of cells

  1. Key genes

  2. Core genes

  3. House keeping genes

  4. None of the above

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Correct Option: B
Explanation:
Core genes refer to the genes present in all the cells of an organism.
Housekeeping genes are those genes which are always expressed in a cell and code for various proteins that are required for the normal functioning and sustenance of cell. These genes are expected to maintain constant expression levels in all cells and at all conditions. Lethal gene is the gene that generally formed by the mutation and causes the death of the organisms.
Thus, the correct answer is option B.

Distinction of individual cells is absent in coenoctic organism such as

botany caskets of life the cell structure multicellular organisms number and shape of cells

  1. Ulothrix.

  2. Volvox.

  3. Escherichia.

  4. Rhizopus.

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Correct Option: D

Who believed in the individuality of cells?

botany caskets of life the cell structure multicellular organisms number and shape of cells

  1. Leeuwenhoek

  2. Lamarck

  3. Dutrochet

  4. Malpighi

Show answer
Correct Option: C
Explanation:

In 1809, Lamarck concluded that all living beings are formed of cells. Living substance was first observed by Corti in 1772 and was named sarcode by Dujardin in 1835. Dutrochet believed in the individuality of cells, i.e., living organisms are made up of a number of individual cells.

So, C is the correct option. 

A multicellular organism possesses

botany caskets of life the cell structure multicellular organisms number and shape of cells

  1. Differentiated cells.

  2. Undifferentiated cells.

  3. Dedifferentiated cells.

  4. All of the above.

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Correct Option: D
Explanation:

A multicellular organism attains its multicellularity from a single cell. Single totipotent cell undergo number of mitotic and meiotic divisions to give rise to a multicellular structure where cells undergo differentiation to a particular function. Some of the cells are undifferentiated such as stem cells which can give rise to any type of cells of the body. Also multicellular organisms undergoes dedifferentiation process where a differentiated cell revert back to totipotent cell and can again differentiate to a particular type of cell witha particular function. So Multicellular organisms posses all these type of cells so Answer D is correct.

Human egg has a volume larger than human sperm by

botany caskets of life the cell structure multicellular organisms number and shape of cells

  1. $100,000$

  2. $10,000$

  3. $1000$

  4. $100$

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Correct Option: A
Explanation:

In short a gamete is an egg cell (female gamete) or a sperm (male gamete). This is an example of anisogamy or heterogamy, the condition in which females and males produce gametes of different sizes. This is the case in humans, the human ovum has approximately 100,000 times the volume of a single human sperm cell. 

Hence A is the correct option.

"Each cell leads a double life" was first proposed by

botany caskets of life the cell structure multicellular organisms number and shape of cells

  1. Schleiden.

  2. Grew.

  3. Von Mohl.

  4. Malpighi.

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Correct Option: A
Explanation:

Schleiden and Schwann presented a cell theory which proposed that each cell is itself is an organism which has all attributes of life. Each cell is living its individual life as well as the as a group of tissue which has become an integral part of plant. So Schleiden while observing plant cells discovered this double life of each cell. So option A is correct.

Functionally important dead cells are

botany caskets of life the cell structure multicellular organisms number and shape of cells

  1. Cork cells.

  2. Tracheary elements.

  3. Endothelial cells.

  4. Both A and B.

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Correct Option: D

Larger sized organisms usually have

botany caskets of life the cell structure multicellular organisms number and shape of cells

  1. Large sized cells.

  2. More non-cellular material.

  3. Higher number of cells

  4. More cellular excretions.

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Correct Option: C

Average size of human body cells is

botany caskets of life the cell structure multicellular organisms number and shape of cells

  1. $5-10\mu m$

  2. $10-15\mu m$

  3. $20-30\mu m$

  4. $70-80\mu m$

Show answer
Correct Option: C
Explanation:

The average size of a human cell is about 100 μm in diameter. The smallest of which is the red blood cell, and it also has not nucleus.