Which one of the following organelles typically receives proteins that were translated directly into the ER?
Chloroplast
Cytosol
Golgi apparatus
Peroxisome
Mitochondria
In: Biology
ATP synthase converts the energy of a proton gradient to rotational/mechanical energy, which is used to generate ATP in a process called ?
In: Biology
A scientist wants to culture Organism A, a bacterium that
is
salt tolerant, penicillin resistant and turns bright purple
in
the presence of chemical X. You are the culture media
consultant and must recommend ways that she might enrich
her nutrient agar to create a selective and a differential
media for Organism A. You recommend the following two
“recipes”. HINT This is an imaginary bacterium. You
are to design two imaginary media- do not suggest ones
such a MacConkey agar.
a. Differential media
b. Selective media
In: Biology
Which of the following steps is NOT part of the life cycle of a lytic phage?
A. The phage DNA is transcribed, and the resulting mRNA is translated to make capsid proteins.
B. The phage DNA integrates into the bacterial chromosome.
C. Phage DNA is injected into the bacterial cell.
D. All of the steps listed are part of the life cycle of a lytic phage.
E. Many copies of phage DNA are made
In: Biology
In: Biology
BIO&160 QUESTIONS:
3. Explain how the various levels of structure of proteins (primary, secondary, tertiary, quaternary) are responsible for protein's very important role as enzymes.
In your answer, use the following terms correctly - induced fit, substrate, active site.
In: Biology
discuss the neural basis of waking behavior?
Describe the three tests that make use of a hidden platform in a swimming pool to examine memory in mice.
In: Biology
BIO&160 QUESTIONS:
2. Why do we say "all the oxygen we breathe comes from the
splitting of water?" Explain in your own words.
In: Biology
| METABOLISM (FERMENTATION) | What are the expected results/did you get them. | ||||||
| Tube | A | B | C | Initial Reading | Final Reading | Volume of the gas bubble created | If not why and Explain |
| 1 | 5 ml phosphate buffer | 1 5 ml phosphate buffer | 5 ml yeast | 1mL | 1.5mL | 0mL | |
| 2 | 5 ml phosphate buffer | 5 ml glucose | 5 ml yeast | 1.5mL | 6.5mL | 5mL | |
| 3 | 5 ml of 0.1 M MgSO4 | 5 ml glucose | 5 ml yeast | 1mL | 8mL | 7mL | |
| 4 | 5 ml of 50 mM EDTA | 5 ml glucose | 5 ml yeast | 1mL | 6mL | 5mL | |
| 5 | 5 ml of 100 mM EDTA | 5 ml glucose | 5 ml yeast | 1.5mL | 2.5mL | 1mL | |
| 6 | 5 ml of 250 mM EDTA | 5 ml glucose | 5 ml yeast | 1mL | 1mL | 0mL | |
| 7 | 5 ml pyruvate/EDTA | 5 ml glucose | 5 ml yeast | 1mL | 8.5mL | 7.5mL | |
| 8 | 5 ml phosphate buffer | 5 ml of 0.1 M lactose | 5 ml yeast | 1mL | 2mL | 1mL | |
| 9 | 5 ml phosphate buffer | 5 ml of 0.1 M galactose | 5 ml yeast | 1.5mL | 2mL | 0.5mL | |
Complete the last coloumn and state why these reactions occured. For example, in tube 3, there was a larger gas bubble because there was a presence of magnesium ions which meant the enzyme elonase was able to function.
In: Biology
BIO&160 Questions:
2. What is the connection between photosynthesis and rising CO2
levels and climate change? Why do climate researchers study
photosynthesis rates to make their predictive models about climate
change?
In: Biology
Q5. Aquaporins are water channels that allow rapid transport across cell membrane. You are interested in the role that these channels play in cerebral edema (brain swelling) after traumatic brain injury (TBI). This channel is expressed on a type of cell in the brain called an astrocyte which is responsive to osmotic pressure and helps regulate fluid balance in the nervous system.
A) Describe what happens to astrocytes when they are placed in i) hypertonic solution and ii) hypotonic solution. How might each of these conditions impact the activity of the aquaporins?
B) you are interested in designing a drug to block aquaporins after chronic TBI. Based on the structure of the channel what structural and chemical properties would be important to block channel activity (BE SPECIFIC).
In: Biology
1. In a paragraph, what are the major steps performed during next
generation sequencing of DNA? How do these steps differ in the
Illumina platform as compared to the Roche 454 platform?
2. In a paragraph, describe the major steps performed during DNA sequencing by the Pacific Biosciences, as well as the Oxford Nanopore Sequencing Technologies.
3. In a paragraph, describe the major advantages and disadvantages of each DNA sequencing platform.
In: Biology
Define “epidemiology” and briefly discuss three key developments in epidemiology from Snow until the present. How do the terms “epidemic” and “pandemic” relate to and differ from each other? Identify and discuss a recent example of epidemic and pandemic. You must cite and reference at least one scholarly source in APA.
In: Biology
This is a question for my biochemistry class. I have copied and pasted it below. This is all that was given to me.
Diagram the flow of genetic material in a cell.
In: Biology
Anthony was a normal, full-term baby at birth. Beginning at about 8 months of age, he suffered from a series of infections such as sinusitis, otitis media, and pneumonia. All of these conditions were successfully treated with antibiotics, but within a few weeks of the resolution of one infection, another would occur. Now at about three years old, Anthony is examined by a pediatrician who notes that he lacks tonsils. After speaking to Anthony’s mother, she reveals that she had a male relative die at infancy from an infectious disease. The pediatrician orders laboratory tests that reveal that the quantity of immunoglobulin in Anthony’s serum is about one-fifth of normal, and that there is a marked deficiency in the number of circulating B-lymphocytes in his blood. However, tests determine that the functional state of Anthony’s T-lymphocytes are all normal. The doctor diagnosis Anthony with a genetic disorder.
1. What genetic disorder does Anthony have?
2. What is the cause of this genetic disorder?
3. Why did Anthony lack tonsils?
4. What treatment(s) will Anthony need and for how long?
5. Explain why Anthony was free of infections in the first 8 months of life.
6. The infections that Anthony had are mostly caused by bacteria. Explain why he was more prone to bacterial infections than viral infections.
In: Biology