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Q1. An experiment is designed to learn the mechanism of sucrose uptake by plant cells. Cells are immersed in a sucrose solution and pH of the solution is monitored. Samples of the cells are taken at intervals and their sucrose concentration is measured. Their sucrose uptake correlates with the rise in the solution's pH. This rise is proportional to the starting concentration of sucrose in the solution. A metabolic poison that blocks the ability of cells to regenerate ATP is found to inhibit the pH changes in the solution. Recommend a hypothesis accounting for these results. Suggest an experiment to test it.
Q2. Could intelligence be primarily a matter of having plenty of the right neurotransmitter at the correct synapses?
Assume that the rate of sea-floor spreading was constant during the 1-million-year period depicted above, what have to be the approximate age of marine fossils found in undisturbed sedimentary rock instantly overlying the igneous rock at the arrow la..
A can of Mountain Dew soda contains 46 g of sugar. Assume that your body completely digests this sugar, 170 kcal of heat energy is available from the sugar. Around how many grams of water will you have to evaporate as sweat to lose this 170 kcal of e..
Using the knowledge of DNA replication, describe the mechanisms in place for preventing mistakes during the process. Also discuss how potential mistakes can happen? What would be the consequences of such mistakes during the process.
The research team used the setup to study the incorporation of labelled nucleotides into culture lymphocytes and found that the lymphocytes incorporated the labelled nucleotide at significantly higher level after a pathogen was introduced into the cu..
Using information provided, what is the hydrogen/helium content inside a star that is the approximate age of our sun. what aspects are consequences of the evolutionary history of animals you are considering.
What are the genotypes of parent orange-fruited plants. Within the two groups defined by bone mass smaller skeletons have bones with evidence of epiphyseal plates should be. Give the age group and gender of the individuals in this fine.
What is the most possible explanation. Cultures from dialysate concentrate and the internal areas of the dialysis machines were negative; iodophor from a small in- use plastic container yielded a pure culture of P. aeruginosa. What improper method le..
North American supply of salmon has not increased. Freeing up these rivers to allow more wild salmon to propagate will increase U.S. exports which are very good for our economy.
If the ATP synthase molecules were randomly orientated so that about half faced the outside of the vesicle and half faced the inside, would you expect ATP to be synthesized.
Plasmids, which are associated with membrane proteins, depend on bacterial chromosomal DNA for replication. If the genome contains ~30,000 genes, about how many genes would be removed by a deletion of DNA that might be detected by karyotype analysis.
Describe why organisms only reproduce their own kind, and why offspring more closely resemble their parents than unrelated individuals of the similar species.
If a long-haired black male is crossed with a tortoise-shell female heterozygous for hair length what kind of kittens would be produced in the F1? If the F1 cats are allowed to generously interbreed among themselves, what are chances of obtain long-h..
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