Contrast the following organelles or structures by filling in the table below. N
ID: 195918 • Letter: C
Question
Contrast the following organelles or structures by filling in the table below.
Nucleolus
Nucleus
Nucleoid
Nuclear envelope
Eukaryotic, prokaryotic, or both?
Key function?
Disorders at the organelle level. Each of the following medical problems involves a disorder in the function of an organelle or other cell structure. In each case, identify the organelle or structure involved, and indicate whether it is likely to be underactive or overactive in an individual with the medical problem.
Organelle or structure
Under- or overactive?
A boy is diagnosed with adrenoleukodystrophy (ALD), characterized by an inability of his body to break down very long-chain fatty acids
A couple hoping to conceive a baby find out that the husband’s sperm are nonmotile.
A young high school athlete has high glycogen and glucose levels, but exhibits muscle fatigue and lethargy
A smoker develops lung cancer and is told that the cause of the problem is a population of cells in her lungs that are undergoing mitosis at a much greater rate than is normal for lung cells.
Young child dies of Tay-Sachs disease because her cells lack the hydrolase that normally breaks down a membrane component called ganglioside GM2, which therefore accumulated in the membranes of her brain.
A man with cardiac problems finds out that he has familial hypercholesterolemia (FH), which is caused by mutations in the LDL-receptor which results in the inability to bring cholesterol into the cell.
A young child is placed on a milk-free diet because the mucosal cells that line his small intestine do not secrete the enzyme necessary to hydrolyze lactose, the disaccharide present in milk.
Nucleolus
Nucleus
Nucleoid
Nuclear envelope
Eukaryotic, prokaryotic, or both?
Key function?
Explanation / Answer
nucleolus: largest structre in the nucleus: it is involved biogenisis of ribosome.
nucleus: the membrane enclosed structre were most of the genetic materialis enclosed.
nucleoid: its nucleus like region where the genetic material of prokaryotes are concentrated.unlike nucleus it doesn't have a membrane enclosed.
Nuclear membrane:is the lipid bilayer membrane which surrounds the genetic material and nucleolus in eukaryotic cells. It separates the genetic material from cytosol.It is present only in eukaryotes.
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