Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

Multiple choice biology cell biology cell as structural and functional unit introduction to cell biology cell : the basis of life

Cell theory was established in

  1. 1838

  2. 1839

  3. Both A and B

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

  • Cell theory was proposed by a German botanist, Matthias Schleiden 1838 and English zoologist, Theodor Schwann in the year 1839. Cell theory was considered as the most acceptable theory which, elucidated the functioning of a cell.
  •  The cell theory includes the following points -
1) All living things are made up of cells.
2) The cell is the smallest living thing that can perform all the functions of life.   
Later on, in the year 1855, Rudolf Virchow added a new point in cell theory that all cells must come from pre-existing cells, which was also known as "Omnis cellula e cellula".

So, the correct answer is option B.

Multiple choice biology cell biology cell as structural and functional unit introduction to cell biology cell : the basis of life

Which of the following is not correct?

  1. Robert Brown discovered the cell

  2. Schlelden and Schwann formulated the cell theory

  3. Virchow explained that cells are formed from pre-existing cells

  4. A unicellular organism carries out its life activities within a single cell
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Robert Brown discovered the cell is false because cells were first discovered by Robert Hooke.

Mathias  Schleiden, Theodar Schwann, and Rudolf Virchow formulated the cell theory, according to which all living organisms are composed of cells. 
Much of the work of  Rudolf Virchow was in proving that cells arise from preexisting cells. 

Organisms consisting of a single cell carry out all functions of life by means of that single cell. 
So, the correct answer is 'Robert Brown discovered the cell'.

Multiple choice biology cell biology cell as structural and functional unit introduction to cell biology cell : the basis of life

One of the following contributed cell lineage to 'cell doctrine' or 'modern cell theory'.

  1. R. Hooke

  2. Schleiden and Schwann

  3. R. Virchow

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In 1855 Rudolf Virchow, after an exciting study of the growth of cells in human tissues, stated clearly that all arise only by the division of pre-existing cells. Virchow's famous statement of this concept, 'Omnis cellula e cellula', completed the cell theory. 

Multiple choice biology cell biology cell as structural and functional unit introduction to cell biology cell : the basis of life

Cell hypothesis was proposed by T. Schwann, the cell theory was proposed by 

  1. M.J. Schleiden

  2. T. Schwann

  3. M. J. Schleiden and T. Schwann

  4. C.P. Swanson
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Theodor Schwann and Matthias Jakob Schleiden proposed the cell theory which describes the properties of cells. These cells are the basic unit of structure in all organisms and also the basic unit of reproduction.

Multiple choice biology cell biology cell as structural and functional unit introduction to cell biology cell : the basis of life

The statement "All the tissues are made up of individual cells" was given by

  1. Schleiden

  2. Schwann

  3. Virchow

  4. Wallace
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Matthias Jakob Schleiden, a German botanist who gave the cell theory, proposes that all plant tissues are composed of cells and that cells are the basic building blocks of all plants and generalized as all the tissue is made up of individual cells.

Multiple choice biology cell biology cell as structural and functional unit introduction to cell biology cell : the basis of life

Who applied cell theory to plants?

  1. Schwann

  2. Schleiden

  3. Jensen

  4. Swanson
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cell theory was applied to plants by Schleiden. Theodor Schwann and Matthias Jakob Schleiden, proposed the cell theory which describes the properties of cells. These cells are the basic unit of structure in all organisms and also the basic unit of reproduction. The work on the plants was done by Matthias Jakob Schleiden.

Multiple choice biology cell biology cell as structural and functional unit introduction to cell biology cell : the basis of life

The statement - All the tissues are made up of individual cells, is given by

  1. Schleiden

  2. Schwann

  3. Virchow

  4. Wallace
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Two German biologists M.J.Schleiden (1838) and Theodore Schwann (1839) proposed the cell theory. According to the theory, all living organisms are composed of cells, which are the smallest entities that can be called as living.

Cells are the functional unit of an organism. Schleiden stated that all the tissues are made up of individual cells.
A German biologist Rudolph Virchow observed that all living cells arise from pre-existing cells (omniscellula e cellula) which was added to the cell theory as a doctrine. Alfred Russel Wallace, a British naturalist, conceived the theory of evolution through natural selection while working on Amazon River basin and then in the Malay Archipelago.
Thus, the correct answer is option A.

Multiple choice biology cell biology cell as structural and functional unit introduction to cell biology cell : the basis of life

Cell theory states that

  1. Cells have nucleus.

  2. Cells are the functional and structural units of plants and animals.

  3. All cells are non-living.

  4. Cells reproduce by mitosis and meiosis.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cell theory was proposed by a German botanist, Matthias Schleiden and English zoologist, Theodor Schwann in the year 1839. It states that cells are structural and functional unit of plants and animals. The cell theory includes the following points -
1) All living things are made up of cells.
2) The cell is the smallest living thing that can perform all the functions of life.   
3) All cells must come from pre-existing cells.

Multiple choice biology cell biology cell as structural and functional unit introduction to cell biology cell : the basis of life

Who among the following applied the cell theory to plants?

  1. Schwann

  2. Schleiden

  3. Jenseu

  4. Swanson
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The cell theory was developed from three German scientist's discoveries. They are Matthias Schleiden, Theodor Schwann, and Rudolph Virchow. In 1838, the German botanist Matthias Schleiden discovered that all plants were composed of cells.

Multiple choice biology cell biology cell as structural and functional unit introduction to cell biology cell : the basis of life

Robert Hooke gave the phrase omnis cellula-e-cellula.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cell theory was proposed by a German botanist, Matthias Schleiden and English zoologist, Theodor Schwann in the year 1839. Cell theory was considered as most acceptable theory which, elucidated the functioning of a cell. The cell theory includes the following points -
1) All living things are made up of cells.
2) The cell is the smallest living thing that can perform all the functions of life.   
Later on, in year 1855 Rudolf Virchow added a new point in cell theory that all cells must come from pre-existing cells, which was also known as "Omnis cellula e cellula".
So, the correct answer is option B.