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Movement of chloride ions across the cell membrane from the the outside of nerve cells to the inside has a delta-G of about 1.1 kcal/mol even in the presence of a gradient. Why is the gradient alone not enough to get the ions into the cell? (Think about how delta-G is calculated for movement into a cell.)
a) must also take into consideration other ion concentrationsb) must also take into consideration the membrane potentialc) must also take into consideration the temperatured) must also take into consideration cotransport
In the case of a locus with two alleles, P is the frequency of AA, H is the frequency of Aa, and Q is the frequency of aa. As with gene frequencies, genotype frequencies must sum to 1.
The ability to taste "Wine" is controlled by a dominant allele W, while individuals homozygous for the recessive allele w, are unable to taste Wine. In a recent genetics class of 125 students, 88 were able to taste Wine, but 37 could not. Assume H..
Needed immunity involves both a humoral immune response and a cell-mediated immune response. To review the definitions of these immune responses.
A sex-linked recessive gene "c" produces red-green color blindness in humans. A normal woman whose father was color blind marries a color blind man.
How do phospholipids interact with water molecules.
How, at what time the shoot tip touched the other plant's stem did the shoot switch from growing straight to growing in a spiral? Write down a hypothesis first.
An analyzer is studying a gene that codes for a very small polypeptide phe his gly cys gly. He treated the cells with different mutagens with the results to the protein.
The picture below shows xylem and phloem tissue in a stem. Arrows show the direction of movement of water (gray arrows) and sugar (black arrows). Using your knowledge of water potential,
Dominant-recessive relationships can make determining genotype tricky, since an individual with the dominant phenotype may have either the homozygous dominant genotype or the heterozygous phenotype.
Three groups of cyclists shown above consumed 3-different types of diets: high-carbohydrate, a diet mixed in carbohydrates, or a diet higher in protein and fat.
how is diffusion important to ATP production? what body systems would use diffusion or osmosis?
An oligomeric protein has a molecular weight of 126000. A 820 mg sample was treated with an excess of 1-fluoro-2,4-dinitrobenzene until the reaction was finish.
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