Answer:
Because older cultures of gram-positive bacteria tend to lose their ability to retain crystal-violet in the peptidoglycan of their cell walls and can be confused with gram-negative bacteria.
Explanation:
Gram staining is used to differentiate between two major groups of bacteria. Gram-positive and gram-negative, these bacteria differ in the amount of peptidoglycan in their cell walls. Gram-positive bacteria have a higher amount of peptidoglycan, which absorbs the violet crystal complex used in gram staining, staining them purple/violet. Old cultures of gram-positive bacteria tend to lose the ability to retain the violet crystal and are stained by safranine, staining them red/pink and appear to be gram-negative.
The answer is (c). microspore.
Its gone be b cause the organism can produce them out
Answer:
The relationship between cell division and cell growth is that cell division needs to occur for the cells to divide and grow individually.
Explanation:
cell division refers to the process by which the mother cells divides into two daughter cells and cell growth refers to the process by which the size of the cell increases as it grows. They are two different but important and interlinked processes in the cell cycle. They depend on each other as failure in one will lead to failure in the other process too. The cell needs to grow proper in order to divide and create more cells.
Answer: DNA polymerase I is able to proofread; DNA polymerase III is not.
Explanation:
Escherichia coli is a gram negative anaerobic bacteria that is found in the gastrointestinal tract of and humans and animals. Escherichia coli has 5 types of DNA polymerase.
a. Polymerase I is used to repair any damaged DNA and proof reading
b. Polymerase II is used in proof reading, DNA Replication and repairs.
c. Polymerase III is primarily responsible for DNA replication. It also has the ability to proof read.
d. Polymerase IV is used to change genetic information of Escherichia coli.
e. Polymerase V is used in DNA repair in Escherchia coli.
