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Question: Electrocardiogram results show a shortened QT interval and an increase in the P-R interval (i.e., decreased duration of action potential and decreased conduction velocity). Laboratory results indicate that his serum potassium level has increased to a value of 6.5 mEq/L (normal: 3.5 to 5.0 mEq/L). This increase in serum potassium causes which of the following?
A. A decreased net driving force for potassium from cells
B. Decreased intracellular potassium concentration
C. Hyperpolarization of the resting membrane potential
D. More negative Nernst potential for potassium
E. More negative resting membrane potential
find the sequence of amino acids coded for by this mRNA.
DNAase is an enzyme that catalyzes the hydrolysis of covalent bonds that join nucleotides together. What will first happen to DNA molecules treated with DNAase.
Explain the general pattern of alternation of generation in plants. Explore why the gametophyte has been reduced to a part (or parasite) of the sporophyte as plants have evolved. Present and defend your finding. Please list sources used. Write in Tim..
Brown eyes (B) are dominant over blue eyes (b) in humans. If a brown-eyed man marries a blue eyed woman and they have three kids, and two of the three have brown eyes and other has blue, what would be the punnett square indicating so look like.
Suppose that the cell membrane is permeable to water but not to ions, Explain what will happen to the cell in terms of osmosis. If the membrane were permeable to ions,
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.
What must a biologist do if she or he finds that different methods of analyzing the same data give different estimates of the relationships among certain taxa.
Consider a transmembrane protein complex that forms a hydrophilic pore across the plasma membrane of a eukaryotic cell. The pore is made of five similar protein subunits, each of which contributes a membrane-spanning alpha-helix to form the pore.
What is the most common agent of UTIs . The pool regularly becomes infested with disease-causing viruses and bacteria. Which species are more possible to thrive in the changing environment.
in guinea pigs yellow coat color is produced by homozygous genotype YY, cream color by heterozygous genotype YW and white by homozygous WW.
how to Analysis of base composition from DNA. Using this data predict the % of adenine. If the same were detected in Tobacco Mosaic Virus [TMV], will it be possible to predict the % of adenine. This job gives reasons.
What would be TRC for a male with the genotype AABbCcDD? For a female. In contrast, each dominant allele in an individual's genotype contributes 12 ridges to the TRC in males and 10 ridges to the TRC in females.
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