Cell

Question 1

Robert hooke

Answer 1

studied and discovered the cell from a thin slice of cork but was DEAD CELL

Question 2

Anton von leuwenhoek

Answer 2

first to observe few living cell like bacteria,protozoa,spermatozoa and RBC under his own designed microscope

Question 3

Robert Brown

Answer 3

discovered the nucleus of the cell (1831)

Question 4

Matthias schleiden

Answer 4

He was a german botanist.he studied a large number of plants and observed that all plants are composed of different kinds of cells which form the TISSUE of the plants.(1838)

Question 5

Theodore schwann

Answer 5

He was a british zoologist.He studied different types of animal cells and reported that cells has a thin outer layer called plasma membrane.
he also studied plant tissue and concluded that presence of cell wall is a unique character of plant cell.
he proposed a hypothesis that the body of plants and animals are composed of cells and their products.(1839)

Question 6

Schleiden and Schwann

Answer 6

Together formulated THE CELL THEORY.the theory do not explain how new cells are formed.

Question 7

Rudolf Virchow

Answer 7

first explain that cell divides and new cells are formed from pre existing cells (Omnis cellula-e-cellula)(1855)

Question 8

what are the exception to cell theory?

Answer 8

viruses (not made of cells but are composed of nucleoprotein particles).

Question 9

Plasmid

Answer 9

single chromosome,double stranded circular DNA.
provides resistance to antibiotics.
plasmid DNA used to monitor bacterial trasformation with foreign DNA.

Question 10

Genetic material of prokaryotes

Answer 10

NUCLEOID

Question 11

Cell envelope in prokayotes

Answer 11

Glycocalyx
Cell wall
Cell membrane

Question 12

what is used as a mordent in gram staining?

Answer 12

Iodine