answer.
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
irinina [24]
1 year ago
6

A loopful of bacteria containing 1000 bacterial cells is inoculated into a nutrient broth and incubated. The culture was in lag

phase for 10 minutes and then went into exponential log phase growth for 5 hours. The generation time for the bacterium is 15 minutes. Which equation set up is the correct one to determine how many cells at the end of the 5 hours of log phase growth.
A. 1000 X 2^20B. 1000 X 2^4C. 1000 X 5 X 2 X 15D. 1000 X 40(Calculate numbers)
Biology
1 answer:
blsea [12.9K]1 year ago
7 0

Answer:

The answer is A.

Explanation:

During logarithmic growth phase bacteria grows exponentially doubling every x minutes (x depends on the species). In this question doubling time/generation time is every 15 minutes and log phase takes 5 hours, which equals to the 300 minutes. During 300 minutes bacteria doubles 20 times (300/15 = 20) which equals 2^20. Bacteria culture has been started with 1000 bacterial cells so it must be added to the calculation therefore right answer is: 1000 X 2^20.

You might be interested in
Summarize variations in climate among three major zones as you travel south from the equator toward the South Pole?
Ainat [17]
Equator area: closest to the sun and hot and humid due to the mass evaporation from the excess heat. 

Mid equator/south pole: somewhat mild, colder, probably mid-humid, depending on which end of the midsection you're going for

South Pole: cold and dry. Cold because it's naturally far away from the sun (like the north pole) and dry because there isn't significant water evaporation here and any that may form crystallizes into snow and ice.
7 0
2 years ago
An unknown chemical is analyzed and found to contain the bases thymine and guanine. This chemical is most likely tRNA. mRNA. DNA
Verdich [7]

Answer:

DNA

Explanation:

Thymine is one of the four nucleobases that pairs with adenine to make up DNA, also called 5-methyluracil. It is replaced by uracil to make RNA molecules during transcription.

Theferore the unknown chemical analyzed was DNA because thymine is found in DNA and not in RNA molecules.

7 0
2 years ago
You visit a huge city with millions of people. If you were to start sampling the cystic fibrosis allele from one generation to t
lys-0071 [83]

Answer:

The frequency would be stable.

Explanation:

Based on the most common symptoms of cystic fibrosis, the disease only appears on adults and elderly. This feature means that the frequency of the disease would not drop or raise because they would still reproduce and pass the allele from generation to the next, maintaining the frequency stable.    

6 0
2 years ago
Select all that apply
Arisa [49]
Fitness magazine
please mark as brainliest
7 0
2 years ago
Read 2 more answers
review the micrographs of cells shown in figure 8-3. what information about cells do these micrographs suggest, which might not
aleksandr82 [10.1K]

Answer:

The micrographs of cells shown in figure 8-3. what information about cells do these micrographs suggest is explained below in details.

Explanation:

Micrographs are the intensified images collected from small microscopes. Cell micrographs are often obtained from tissue specimens and show a constant mass of cells and inside compositions that are difficult to distinguish individually. It provides accurate images of the exteriors of cells and whole plants that are not imaginable by TEM. It can also be practiced for particle counting and size resolution, and method control.

6 0
1 year ago
Other questions:
  • Which element acts as a hydrogen acceptor during aerobic respiration?
    8·2 answers
  • you are doing an experiment outside on a sunny day you find the temperature of some sand is 28 degress Celsius you also find the
    13·1 answer
  • Which of the following statements correctly identifies the relationship between a flower and a fruit
    9·1 answer
  • During georgia's severe drought what recreational facility was under construction
    9·2 answers
  • Many mammals control their body temperature by sweating. which property of water is most directly responsible for the ability of
    10·1 answer
  • The brachialis does not act at the shoulder and the coracobrachialis does not act at the elbow joint. Explain
    14·1 answer
  • why is climate change a serious threat to the least developed agriculture area, mountain region and island country?​
    7·1 answer
  • Raven is planning a vacation. She wants to go somewhere warm and sunny on her trip because her hometown experiences harsh winter
    6·2 answers
  • The figure below shows an organelle typically found in eukaryotic cells. Which of the following best describes the function of t
    12·1 answer
  • What combination of brightness, carbon dioxide, and water amount results in the greatest sugar production?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!