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
svetoff [14.1K]
3 years ago
12

Suppose that when you examined your tubes (in this exercise) after incubating them, you noticed that the unsealed control contai

ned slight yellowing at the top. suppose further that pair #1 showed complete yellowing of both tubes and pairs #2 and #3 showed slight yellowing of the unsealed tube.
Biology
1 answer:
aivan3 [116]3 years ago
6 0
The Oxidation-Fermentation Test is used to differentiate bacteria built on their capability to oxidize or ferment specific sugars.
Once microbes are inoculated,-One tube is sealed with a layer of sterile mineral oil to promote anaerobic growth and fermentation.-The other tube is left unsealed to allow aerobic growth and oxidation.
Organisms able to ferment the carbohydrate or ferment and oxidize the carbohydrate will turn the sealed and unsealed yellow throughout.
Organisms able only to oxidize the sugar will turn the unsealed yellow medium and leave the sealed medium green or blue.
Fragile fermenters will convert both tubes slightly yellow at the top.
Organisms not able to metabolize the sugar will either produce no color change or will turn the medium blue due to alkaline products from amino acids degradation.
Since Pair #1 showed complete yellowing for sealed and unsealed, these Organisms able to ferment the carbohydrate or ferment and oxidize the carbohydrate. So our interpretation will be that the organism has: Oxidation and fermentation OR fermentation only.
For tubes #2 and #3, the sealed tubes were green throughout suggests that they need oxygen for aerobic growth, and the fact that their unsealed tubes showed light yellowing is evidence for oxidation. Sealed - Green and Unseal - Yellow. Our interpretation for these pairs of tubes would be : Oxidation
Tube 1 can be either Oxidation and fermentation OR fermentation only. So reliability of this needs to be confirmed more with additional testing.
Tubes 2 and 3 are most reliable because they can only be oxidation only and no fermentation.
You might be interested in
Alcohol dehydrogenase (ADH) is an enzyme that aids in the decomposition of ethyl alcohol (CH3OH) into nontoxic substances. Methy
Thepotemich [5.8K]

Answer:

d. Competitive inhibition will decrease because the proportion of the active sites occupied by substrate will increase.

Explanation:

Enzymes are bio catalysts in living cells responsible for aiding biochemical reactions.

Their active sites are primary protein  3D structure  for binding with substrates during   reactions.

Enzymes reactions are usually affected by inhibitors(e.g methyl alcohol) which compete with the active site with the actual substrate(ethyl alcohol) ,

This is an example of competitive inhibition. The more ethyl alcohol available, the more active sites  occupied, therefore denying the inhibitor methylalchol  chances to the active site, thus preventing the formation of toxic formaldehyde, and more of non toxic substances from formation of more ADH-METHYL ALCOHOL COMPLEXES at the active sites

8 0
3 years ago
If the diploid number of a bull is 60, the chromosome number found in its sperm is <br>Help ASAP
dalvyx [7]

Answer:

30

Explanation:

sperm cells are haploid

6 0
3 years ago
Read 2 more answers
Diabetes is a disease where the body is unable to produce enough insulin in the pancreas to help lower the levels of blood gluco
JulijaS [17]

Answer:

It is the endoplasmic reticulum and the ribosomes of the specialized cells in the pancreas that make insulin

Explanation:

hfjd

6 0
3 years ago
Read 2 more answers
The diagram shows the transfer of energy. Which statement describes the condition of energy at position 2?
sladkih [1.3K]

The correct answer is (A)

Burning of wood is a chemical change as new substance is formed during the burning of wood which is not reversible.

Now, what happened during the burning of wood?

In the case of burning wood, stored potential energy( in the form of chemical energy) in the log is released due to heating by other excited atoms. This chemical reaction is called combustion that requires oxygen. We can also say that combustion is change of potential chemical energy into kinetic energy in the form of heat.

7 0
4 years ago
Read 2 more answers
Typhoid fever is caused by bacteria in contaminated food or drink. In 1903, an outbreak of typhoid fever in Ithaca, New York, ki
melomori [17]

Answer : Option B) Density -  dependent factor.

Explanation : Typhoid outbreak is dependent of the density as the people of the region are getting the water from the same source so, the density of the area is also an influencing factor in spreading the disease. The bacteria is also getting transmitted from one human to other human too.

5 0
3 years ago
Read 2 more answers
Other questions:
  • What is the function of the spinal cord
    7·2 answers
  • Please help me asap. Thank yew.
    8·2 answers
  • When do homologous chromosomes line up in the middle?
    9·1 answer
  • The nurse is assessing a primipara's fundal height at 36 weeks' gestation and notes the fundus is now located at the xiphoid pro
    10·1 answer
  • Apartment buildings and parking lots completley cover an area that was once an open grass, field. What factor most likely increa
    15·1 answer
  • In order for an animal cell in a culture to maintain homeostasis, the medium must not:
    10·2 answers
  • As a cells size increases it’s amount of DNA also increases
    15·2 answers
  • The various parts of the endomembrane system serve different functions in the cell. In this activity, you will identify the role
    5·1 answer
  • What kinds of cells can develop from unipotent stem cells
    10·1 answer
  • A student wants to know if the weight of a cart affects its speed at the bottom of a ramp. He changes the weight of the carts by
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!