1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lana66690 [7]
3 years ago
9

Suppose you are trying to identify an unknown bacterial species. You perform a Gram stain and the slide is a blue/purple color w

hen you are finished. Are the bacteria gram-positive or gram-negative?
Biology
1 answer:
mixas84 [53]3 years ago
4 0

Answer:

IN GRAMS stain bacteria having blue /purple colour are <u>GRAM positive</u><u> </u>bacteria.

Explanation:

GRAM staining is the technique to differentiate bacteria on the basis of stain. In this procedure bacterial cells with blue/purple colour are Gram positive and cells with pink colour are Gram negative.

                                            PROCEDURE

  • In the first step cells are stained with crystal violet dye which is blue in color.
  • Then Grams iodine solution is added, it forms a complex between dye and iodine. This complex is insoluble in water.
  • Next step is addition of ethyl alcohol as a decolorizing agent. It shrinks the peptidoglycan layer by dehydrating it. In gram negative bacteria on the treatment of alcohol this complex( crystal violet- iodine complex) comes out from the outer membrane because of thin peptidoglycan layer. Gram negative bacteria lost color and decolorized. While in Gram positive bacteria because of thick peptidoglycan ,crystal violet-iodine complex trapped in the membrane. And cells don't give violet color of dye.
  • After this a counterstain safranine is used, which can not color the stained Gram positive bacteria. Gram negative decolorized bacteria stain pink with safranine.

 

You might be interested in
Sets the metabolic rate for the cells of the body describes
Kazeer [188]

Answer:

BMR ;  Basal Metabolic Rate

Explanation:

MR is  the rate of energy expenditure per unit time by endothermic animals at rest....

Metabolic comprises the process that the body needs to function.

Basal metabolic rate is the amount of energy per unit of timethat a person  needs to keep the body functioning at rest

3 0
3 years ago
Organisms that obtain energy by eating nutrients that make up other organisms are called:
balu736 [363]

The organisms that obtain energy by eating nutrients that make up other organisms are called Hetertrophs. The correct answer between all the choices given is the second choice or letter B. I am hoping that this answer has satisfied your query about and it will be able to help you, and if you’d like, feel free to ask another question.

3 0
3 years ago
I just need the correct answers
rosijanka [135]
The answer is “it is the gap between neurons” and “it ensures that information travels in one direction only.”
6 0
3 years ago
Which body system is not directly connected to itself?
nekit [7.7K]

Answer:

<h3>0 endocrine </h3>

Explanation:

<h3>I hope it helps ❤❤</h3>
8 0
3 years ago
As discussed in lecture, when a woman's basal body temperature rises it means __________________________
borishaifa [10]

<span>Basal Body Temperature (BBT) is the body temperature upon waking up or when a person is at rest. After ovulation, a woman’s BBT rises because of increase in progesterone level. BBT swill stay high throughout the post-ovulation phase and until the following cycle. If there is pregnancy, BBT will stay high.</span>

8 0
3 years ago
Other questions:
  • A sperm cell fuses with an egg cell to produce a zygote. How does the DNA content of the zygote compare to that of the egg? Of t
    12·2 answers
  • The genetic code is a sequence of DNA nucleotides. In eukaryotic cells, the DNA is located in the nuclei of the cells. The genet
    13·1 answer
  • What is the origin of each strand of the new double helices created after DNA replication?
    7·1 answer
  • A step in food chain or food webs.
    10·1 answer
  • Which organism is an example of a producer. A OWL B SNAKE C MOUSE DGRASS
    5·2 answers
  • Jupiter is a Jovian planet. Compared to the<br> terrestrial planets, Jupiter has a
    7·2 answers
  • Explain one way the water cyce affects weather.
    8·1 answer
  • PLs HELP !!!!!
    6·2 answers
  • When does the exponential growth of a population stop?
    13·1 answer
  • According to Figure 9 of Chapter 14, approximately how many amino acid differences are
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!