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
kirill115 [55]
3 years ago
14

Describe the principle of MPN for enumerating bacteria from a natural sample.

Biology
1 answer:
KengaRu [80]3 years ago
5 0

Answer:

MNP stands for the most probable number which is used for finding out the concentration of viable bacteria in a sample. It is commonly used to check the quality of water and its safety. Usually, the presence of fecal coliform bacteria is checked in this test.  

Principle of MNP: The sample which is to be tested is diluted serially and then inoculated into a broth medium containing lactose. If coliforms are present in the tube than it will consume lactose and release acid and gas.

Color change represents acid production and gas trapped in the Durham tube represents the gas production by bacteria. Then the number of tubes at each dilution that showed positive results are compared with standards to determine the most probable number of the bacteria.

You might be interested in
What is the Cas9 enxyme used for?
frez [133]

Answer:

RNA

Explanation:

CRISPR system was discovered by a Japanese scientist. Naturally bacteria and many other prokaryotes have CRISPR system in their genome which they use as a self defense against a pathogen which is invading them. It consists of inter spaced, short palindromic nucleotide repeats which encode a guide RNA (gRNA). This guide RNA (gRNA) recognizes the target sequence on the pathogen. The gRNA is followed by Cas9 enzyme which along with the gRNA plays a very important role in breaking genome of the pathogen. Once the target gene is cut down the rest of the DNA can be rejoined by non homologous end joining.

But nowadays, scientists are using this system for genome editing and incorporating desired gene between the two ends which are cut down by CRISPR Cas9 system.

7 0
3 years ago
Adaptation of spermatozoon
stellarik [79]
What is a spermatozoon?

6 0
3 years ago
A molecule that is positively charged on one end and negatively charged on the other end is
nataly862011 [7]

Answer:

Polar molecule

Explanation:

7 0
3 years ago
Which organism has cells that work together to form tissues, tissues that combine to form organs, and organs that work together
Debora [2.8K]
The answer you're looking for is Panda because a panda has an organ system, the other choices are all microscopic organisms so they don't have an organ system

Hope this helped you out :)
4 0
3 years ago
Read 2 more answers
What are:<br> Biochemical cycles and reservoirs for nutrients.<br><br> Thanks!
WINSTONCH [101]

Answer:

The term biochemical is a contraction that refers to the consideration of biological, geological and chemical apect of each cycle.

A nutrient reservoir is used to hold the water/ nutrient mixture plant need for strong growth and good health

Explanation:

<em>H</em><em>o</em><em>p</em><em>e</em><em> </em><em>T</em><em>h</em><em>i</em><em>s</em><em> </em><em>H</em><em>e</em><em>l</em><em>p</em><em>e</em><em>d</em><em> </em><em>You</em><em>!</em><em>!</em><em>!</em>

5 0
2 years ago
Read 2 more answers
Other questions:
  • What did chloroplasts evolve from according to the endosymbiotic hypothesis?
    13·2 answers
  • Compare the hibiscus and spider lily pollen grain structure​
    9·1 answer
  • What nerve transmits sound impulses to the brain?
    9·2 answers
  • A zoologist has been studying the annual migration of a species over a period of years. He missed the annual event on two occasi
    14·2 answers
  • what conditions create the largest waves in the ocean enter your answer in the space provided please help !!! ​
    9·2 answers
  • How is cell division different in prokaryotes and eukaryotes?
    8·1 answer
  • Black footed ferrets are native to the great plains. which factor would decrease an area's carrying capacity for these ferrets?
    9·1 answer
  • How would you correct the mutated cftr protein if you had the ability to tinker with it?
    8·1 answer
  • Regulating the manufacture of<br> is the function of RNA.<br> protein<br> cells<br> energy
    15·2 answers
  • A person's blood type is determined by?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!