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
Masteriza [31]
3 years ago
14

Looking at your results of the Ames test , using bacteriological agar medium plates lacking the amino acid histidine, you find t

hat there are many colonies growing on the agar. Your interpretation of this result is:
A. The bacterium has turned its operon genes on, producing proteins necessary for growth
B. The chemical being tested is mutagenic
C. The bacterium does not have any plasmids, so it cannot grow on the medium
D. The drug being tested has no inhibitory effect on the bacterium, therefore it is not a good antibiotic to give for treatment of disease
Biology
1 answer:
rodikova [14]3 years ago
8 0

Answer:

B

Explanation:

The Ames test is a bacteriological technique commonly used to determine if a particular chemical or substance can cause mutations. To achieve this, researchers use bacteria (commonly <em>Salmonella typhimurium</em>) as this bacteria strain is unable to grow in a medium that does not contain histidine (a very important amino acid in the biosynthesis of proteins). If the studied substance is able to cause mutations, bacteria will mutate, and they will be able to grow on that particular media even if they don’t have histidine for their metabolism. Therefore, if there are colonies growing, the chemical being tested is mutagenic.  

I hope this clarify your inquiry.  

You might be interested in
Acording to erikson what is the first stage of psychosocial development?
Lilit [14]

Answer:

The answer would be trust .vs. mistrust

Explanation:

This is the first stage

Mark as branliest please :)

7 0
3 years ago
Why do rice plants include starch and protein in their seeds
Wittaler [7]
A single gene could be inserted into a plant's genome, enabling specific traits to be expressed easily. Scientists have identified genes for two enzymes needed to make pro-vitamin A. One of these genes comes from corn.
6 0
3 years ago
Read 2 more answers
How do fungi benefit trees?
MA_775_DIABLO [31]

Answer:

Some fungi help trees and other plants to grow. Because the fine threads that make fungal mycelium can spread over long distances, fungi can capture water and nutrients from far away and bring them back along the fine threads and close to plant roots.

Can you make me Brainliest Answer please?

Explanation:

5 0
3 years ago
A reaction produces a gas, which is collected in a glass cylinder. when a glowing splint is placed inside the container, it burn
defon

If a burning splint is placed in a container and burns more brightly in the presence of some gas already in the cylinder, that gas would probably be Oxygen.  

Oxygen is the main component of air that we need to breathe. It is the most commonly available oxidizer. Besides combustion, it plays many roles in our life such as; the food we eat requires oxygen which helps in digestion and absorption of nutrients by the cells.  


5 0
3 years ago
Which of the following would affect the function of an enzyme?
Blizzard [7]

TEMPURATURE:

Raising temperature generally speeds up a reaction, and lowering temperature slows down a reaction. However, extreme high temperatures can cause an enzyme to lose its shape (denature) and stop working.

pH:

Each enzyme has an optimum pH range. Changing the pH outside of this range will slow enzyme activity. Extreme pH values can cause enzymes to denature.

DIFFERENT SUBSTRATES:

Increasing substrate concentration also increases the rate of reaction to a certain point. Once all of the enzymes have bound, any substrate increase will have no effect on the rate of reaction, as the available enzymes will be saturated and working at their maximum rate.

I got these explanations from khan academy :)

5 0
2 years ago
Other questions:
  • Organisms that use energy from the sun to make their own food are called
    13·2 answers
  • How are alligators and crocodiles different?
    7·2 answers
  • Which molecule shown above contains a functional group that is a part of the molecule known as the "energy currency of living or
    6·1 answer
  • Which type of microscope is used to view very small cell components like proteins and DNA?
    13·2 answers
  • A scientific theory states that the universe is expanding. which of these statements is correct about this theory?
    13·2 answers
  • Which of the following shows the importance of incoming solar energy for life on earth?
    5·1 answer
  • Which of these components of the human body can control heartbeat?
    15·1 answer
  • What are some similarities between distance and displacement
    6·2 answers
  • Name the component of a person's diet that is essential for peristalsis​
    13·1 answer
  • What is the chromosome number for each is cell division occured
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!