Henrietta Lacks we can see this illustrated in that
women cells were taken without her knowledge or permission and used
for technological and medical purposes was this right
In: Biology
Is the culture medium: Phenyl ethyl Alcohol ( PEA)
Bacteria |
Gram stain |
Growth |
Changes in the culture medium or bacteria |
Escherichia coli |
Negative |
no |
|
Pseudomonas fluorescens |
negative |
no |
|
Enterobacter aerogenes |
negative |
no |
|
Alcaligenes faecalis |
Negative |
no |
|
Micrococcus luteus |
Negative |
yes |
No changes |
Staphylococcus epidermidis |
positive |
yes |
No changes |
Enterococcus faecalis |
positive |
Yes |
No changes |
Bacillus cereus |
positive |
Yes |
No changes |
Syprogyra is ________.
How Does escheria coli grow in a nutrient broth?
In: Biology
Why is a process as complex as the citric acid cycle actually an economical way for cells to do their metabolic business?
In: Biology
1. Misconceptions about the role of greenhouse gasses in climate change are almost as common as misconceptions about evolution. Usually, the misconceptions have a little bit of truth in them, but it is coupled with a misunderstanding. Take a look at the following misconceptions, choose one and discuss what is incorrect about that statement and what parts of it are correct. If you’re not sure what is wrong, just discuss what parts of it make sense to you.
a. Carbon dioxide destroys the ozone layer and lets in more sunlight, warming up the earth. More carbon dioxide emissions lead to a bigger hole and higher temperatures.
b. Carbon dioxide rises into the air because it is warm. The more carbon dioxide is released, the warmer the air gets causing global warming.
c. Light energy coming from the sun is absorbed by carbon dioxide in the atmosphere and the carbon dioxide sends the heat down to the surface of the earth, heating it up. The more carbon dioxide is released, the more heat is sent down to the earth’s surface.
d. CFCs are greenhouse gasses that destroy the ozone layer. As more CFCs are released, the ozone layer gets smaller and lets in more sunlight, causing the earth to heat up.
e. Ice usually reflects sunlight away from the earth and into space. Carbon dioxide causes ice to melt, meaning less sunlight is reflected and more is absorbed by the earth, further heating up the atmosphere.
f. Ozone is a greenhouse gas. When the ozone hole increases, it lets in more ozone. The ozone traps the heat radiating from the surface of the earth and keeps it from being lost to space, heating up the planet.
2. In many ways our actions can have a positive effect on the environment. Making these changes all at once can be overwhelming. But making one change at a time is quite do-able and can start you on a path toward making more environmentally-conscious changes in the future. Suggest one change in your habits or lifestyle that you feel willing and able to try making to reduce your impact on the environment.
In: Biology
Think about the diphtheria vaccine. how can people infected with COVID-19 generate free antibodies in their plasma when they are recovered. How and why is the plasma from recovered patients used as a one of the potential treatments for Infected covid-19 patients? Knowing this, think about how to make a vaccine against covid-19. Possibly substitute the virus for diphtheria? why do we need booster doses of the diphtheria vaccines?
In: Biology
Stimulated B lymphocytes switch from the synthesis of membrane-bound to secreted antibody molecules by increasing the concentration of CstF complexes that cleave and polyadenylate mRNAs. How does this up-regulation of CstF bring about the production of soluble antibodies?
It favors a strong polyadenylation site in the immunoglobulin primary transcript, creating a longer antibody molecule that is secreted.
It activates a weak polyadenylation site in the immunoglobulin primary transcript and prevents splicing, creating a shorter molecule that is secreted.
It favors a strong polyadenylation site in the immunoglobulin primary transcript, creating a shorter antibody molecule that is secreted.
It activates a weak polyadenylation site in the immunoglobulin primary transcript, creating a longer antibody molecule that is secreted.
It favors a strong polyadenylation site in the immunoglobulin primary transcript, aborting translation and creating a shorter antibody molecule that is secreted.
In: Biology
What are VBNC bacteria and why do they exist? How have they impacted our identification of microbial life on our planet? What strategies and approaches would you follow to attempt to successfully culture bacteria (that were shown to be present through bacterial DNA extraction, PCR and gel electrophoresis) from a soil sample that would be described as “sandy”? Include some rationale behind your plans. For example, how does an understanding of the physiological state of the bacteria factor into your plan? By physiological state, I mean, states of stress, nutrient depletion, etc. Why is this important in terms of basic and applied environmental microbiology?
In: Biology
Which of the following is FALSE regarding hox Genes?
Group of answer choices
They serve the role of defining segmental regions along the anterior to posterior axis during development
Their functions have diversified through gene duplications followed by differentiation (e.g. subfunctionalization), leading to differentiation of segmental regions in animals
They encode transcription factors that perform trans-regulatory functions
They are responsible for the major body plan differences among animal phyla
In: Biology
A)How are the cnidocytes distributed over the body of Hydra? Does their distribution suggest anything about their function? what?
B)In what way does the mesoglea of the cnidarians differ from the mesohyl of the poriferans?
c) what happens to a Hydra when the epithelia-muscular cells that run parallel to the long axis of the body contract? what happens then those cells that run perpendicular to the long axis of the body contract?
In: Biology
Which biomolecules are relevant to function and structure? Use those biomolecules to explain the difference in appearance of the two organisms. Explain your response.
In: Biology
What is pharmacogenomics? conduct research that presents well-developed argument/information that establishes the scope of the issue. The topic to be researched is the topic of Pharmacogenomics. Include your own opinions and thoughts on the topic. Background information needs to be properly cited. (At least 2 or 3 references are required.
In: Biology
Compare the timing of the molecular divergence of the four mammalian superorders, and the timing of their anatomical divergence as seen in the fossil record
In: Biology
What would happen to the expression of the trp operon if you replace the key tryptophan codons in the leader peptide with tyrosine codons?
In: Biology
a) How is the Hardy–Weinberg Model used to describe allele and genotype frequencies in a Population Gene Pool?
b) Explain how Natural Selection drives Allele Frequency Change in populations
c) Name and explain the three different impacts of selection on a population.
In: Biology
In: Biology