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A biologist is examining an organelle with an electron microscope. She observes a continuous network of membranes. The tubed membranes are in contact with the nucleus and have small, round structures on the outside of the membranes. Which cell organelle is being observed?
Compare and contrast gene expression in prokaryotes vs. eukaryotes from the standpoint of promoter sequences
An individual with a disease demonstrates a set phenotypic presentation, Another individual with the same phenotypic presentation is discovered. When we sequence their genome, we find that there are two distinct DNA sequences involved, both differ..
Describe the difference between an acid solution and a basic solution at the molecular level.
You start to have a scratchy feeling in the back of your throat. After a few days it hurts to swallow, so you go to doctor. The doctor tells you that you have strep throat.
Describe the role of 2,3-bisphosphoglycerate in the function of hemoglobin. Explain how HbF can bind oxygen from HbA. Describe the effect of Ach on Nicotinic and Muscarinic receptors. Identify organs with each type of receptor.
Suppose that in plants, smooth seeds (S) are dominant to wrinkle seeds (s) and tall plants (T) are dominant to short plants (t). A tall plant with smooth seeds was backcrossed to a parent that was short and wrinkle. What proportion of the progeny ..
Explain the central dogma of biology? What is the RNA world hypothesis? If you mix all the macromolecules required for cell metabolism (lipids, carbohydrates, proteins, RNA, DNA), will you utilize a living cell? Justify your answer, give a referen..
Do you think the concept of emergence is important inhelping us to better understand how biological systems function? Why or why not?
Which of the following hormones is able to alter gene expression in the mitochondria? Which of the following is Not associated with thein tracellular mechanism of hormone action used by lipid solublehormones?
Imagine five cells, each of a different shape and all requiring oxygen. Which of the following would have the most satisfactory oxygen supply? Why
Assume that a mutation occurs in an intron of a gene encoding a protein. What would the most probable effect of the mutation be on the amino acid sequence of that protein.
If 9% of an african population is born with a severe form of sickle cell anemia (ss), What percentage of the population will be more resistant to malaria because they are heterozygous (Ss) for the sickle-cell gene?
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