In peas, tall (T) is dominant to short (t), yellow (Y) is dominant to green (y) and round (R) is dominant to wrinkled (r). A purebreeding plant with tall, green and wrinkled pea phenotypes is crossed to a purebreeding plant that is short and makes yellow, round peas. When peas from this F1 generation are crossed, what is the probability of obtaining a short plant that makes yellow, wrinkled peas in the F2?
In: Biology
What are advantages of the study on microbial growth and product production phases and kinetics
In: Biology
Explain how attenuation regulates the trp operon in response to cellular levels of tryptophan
In: Biology
Describe what is meant by the term consensus sequences for transcription in E. coli and their significance in regulating transcription from promoters recognized by the σ70 factor.
In: Biology
A central question in biology is, how do we have > 200 different cell types, complete with unique cell morphologies and functions, when all cells have the same DNA (the concept of genomic equivalence). Epigenetic regulation of gene transcription is one way to explain this. Define what is meant by epigenetic regulation of gene transcription, including different general epigenetic mechanisms, and describe three different contexts of a developmental process that is associated with epigenetic changes that we have discussed in class.
In: Biology
In: Biology
In: Biology
Assume that you are responsible for decontaminating materials in
a large hospital.
How would you sterilize each of the following? Briefly
justify your answers.
a. a mattress used by a patient with bubonic plague
b. intravenous glucose-saline solutions
c. used disposable syringes
d. tissues taken from patients
In: Biology
This is normally accomplished through methylation of a cytosine:
a. paternal effect b. imprinting c. epistasis d. maternal inheritance e. aromatase
In: Biology
Describe what it means for interactions to be selfish by using the concepts of actor and recipient.
In: Biology
In: Biology
A mountain climber ascends to an altitude where the partial pressure of oxygen in the atmosphere is very low.
1. What happens to levels of erythropoietin in the blood after a period of time at high elevations?
2.How does a low concentration of oxygen in the alveoli affect the state of contraction of pulmonary arterioles?
3.Explain why pulmonary edema is a symptom of altitude sickness
In: Biology
Using your knowledge of cellular respiration, provide a detailed accounting of the ATP produced. Be sure to include the exact contribution of the electron carrier molecules NADH and FADH2 and how this relates to ATP production.
In: Biology
In: Biology
How could you show that the adaptor protein AP2 has a phosphatidylinositol-4,5-bisphosphate (PIP2) binding domain?
In like a simple-ish explanation please.
In: Biology