cell theory, doctrine, and gram staining, singer and nicolson

Question 1

what are the drawbacks of cell doctrine?

Answer 1

rbs of camel don’t have a nucleus and viruses don’t follow cell doctrine

Question 2

professions of schwan and schleiden

Answer 2

botany and zoology respectively

Question 3

gram-positive takes what color after crystal violet

Answer 3

blue/ violet

Question 4

gram-negative takes what color after saffranine?

Answer 4

pink

Question 5

what is added after crystal violet

Answer 5

iodine

Question 6

three models by Nicolson and singer

Answer 6

quasi fluid nature of lipids, proteins icebergs floating in the sea of phospholipids, fluid mosaic model.

Question 7

cell wall percentage in gram-positive

Answer 7

20- 80 percent

Question 8

cell wall percentage in gram-negative

Answer 8

8-12 percent

Question 9

presence or absence of membrane in gram-positive and negative

Answer 9

outer membrane is absent in gram positive and present in gram negative

Question 10

teichoic acid presence and absence in gram-positive and negative

Answer 10

present in positive absent in negative

Question 11

length of mycoplasm, RBCs, bacteria

Answer 11

0.3 um, 7um, 3 to 5um