Which of the following statements is true? a. gram-positive bacteria have an outer membrane. b. gram-negative bacteria have a cell wall made of peptidoglycan, while gram-positive bacteria have a cell wall made of phospholipids. c. gram-positive bacteria have a single cell wall formed from peptidoglycan. d. the cell wall of gram-negative bacteria is thick, and the cell wall of gram-positive bacteria is thin.

A

Explanation:

Step 1 of 5

Bacteria are divided into two groups, namely Gram-positive bacteria and Gram-negative bacteria. This division is done on the basis of reaction of the bacteria to Gram staining.

Gram-positive bacteria lack an outer membrane and consist of many layered peptidoglycan instead. Also, Gram-negative bacterial cell wall is not thick and Gram-positive bacterial cell wall is not thin. It is actually the other way round. The peptidoglycan layers in Gram-positive bacteria make their cell wall thick whereas the few peptidoglycan layers in Gram-negative bacteria make their cell wall thin.

Step 2 of 5

Step 3 of 5

Hence, the options b, c and d are false.

Step 4 of 5

Gram-negative bacterial cell wall is made up of few layers of peptidoglycan along with some additional layers which are surrounded by the outer membrane. Cell wall of Gram-positive bacteria is made up of many layers of peptidoglycan and not of phospholipids.

The cell wall of Gram-positive bacteria is made up of only peptidoglycan. Many layers of peptidoglycan form its cell wall.

Step 5 of 5

Hence, the true answer is option   Hopefully this is right if not I am sorry

answer: i say it foxes

explanation:

you need to give us the answer options to for me to offical decide.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."