Cell Theory

Q.

Cell theory was given by

1. Robert Hooke

2. Meselson and Stahl

3. Robert Brown

4. Schleiden and Schwann

Q.

The dictum- "Omnis cellula e cellula" was proposed by:

1. Schwan

2. Virchow

3. Schleiden

4. Robert brown

Q.

The scientist who said that cells arise from pre existing cells is

1. schwann

2. virchow

3. hooke

4. schleiden

Q.

Who reported that the entity of an organism is not because of the cell but because of a collection of many cells?

1. Schleiden and Schwann

2. Dujardin

3. Dutrochet

4. Robert Brown

Q.

A common characteristic feature of plant sieve tube cells and most mammalian erythrocytes is

1. Absence of mitochondria

2. Absence of nucleus

3. Presence of cell wall

4. Presence of haemoglobin

Q. All of the following statements are true regarding the "cell theory" except

1. All living things are made up of cells
2. Cells are the smallest structural and functional unit of life
3. Cell comes only from pre-existing cells
4. All cells arise spontaneously

Q. New cells are generated from

Q.

Who among the following advocated cell theory?

1. Purkinje and Von Mohl

2. All the above

3. Schleiden and Schwann

4. Hertwig

Q.

Cell arises from the pre-existing cell was stated by

1. Haeckel

2. Virchow

3. Hooke

4. Schleiden

Q. Which of the following is not correct?
(a) Robert Brown discovered the cell.
(b) Schleiden and Schwann formulated the cell theory.
(c) Virchow explained that cells are formed from pre-existing cells.
(d) A unicellular organism carries out its life activities within a single cell.

Q. in coelenterates the arrangement of cell is more complex explain

Q. Corona virus is which type of virus RNA standed or DNA standed

Q. Virus are regarded as intermediat between non living and living organism . Justify the statement

Q. Which is correct about cell theory in view of current status of our knowledge about cell structure?

1. It needs modification due to discovery of sub cellular structure like chloroplasts and mitochondria.
2. Modified cell theory means that all living beings are composed of cells capable of reproducing.
3. Cell theory does not hold good because all living being do not have cellular organization (e.g., viruses)
4. Cell theory means that all living objects consists of cells whether or not capable reproducing.

Q.

give me the basics features of living organisms

Q.

comparisions between bacterim cell , plant cell and animal cell.