prokaryotes

Question 1

what bare characteristics of porkaryotic cells

Answer 1

• 1-10pm
• unicellular (may form chains or clusters )
• no nucleus
• 1 Circular DNA molecules ( vc chromosomes)
• located in nucleiod region
• no organelles
• ribosomes tree in cytoplasm
• divide by binary system

Question 2

internal membrane

Answer 2

created by infolding of plasma membrane

Question 3

flagella

Answer 3

locomotion

Question 4

pili

Answer 4

adhere cells to surfaces and each other

Question 5

what does sex pilus do

Answer 5

enables conjugation ( direct transfer of genes from one individual to another

Question 6

cytoskeleton

Answer 6

system of protein filaments that maintain cell shape and play roles in cell division

Question 7

what are the characteristics of cell walls ?

Answer 7

• surrounds plasma membrane
• it supports the cell and determines its shape

Question 8

what were prokaryotic taxonomy dna sequencing based on ?

Answer 8

• shape
• color
• motility
• nutrition
• antibiotic sensitivity

Question 9

what do bacterial cell walls contain ?

Answer 9

peptidoglycan

Question 10

what is the gram stain method

Answer 10

separates bacteria into two groups

Question 11

what are the two stains in the gram stain method ?

Answer 11

one violet and one red

Question 12

what does a gram positive bacteria have ?

Answer 12

a thick peptidoglycan layer

Question 13

what do gram negative bacteria have ?

Answer 13

thin peptidoglycan layer and an additional outer membrane