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Suppose that an SBH experiment shows that all 4^l l-mers are present in the target DNA sequence. What is the minimum length of a target sequence consistent with this l-mer composition? How many minimum length target sequences consistent with this l-mer composition are there?
What is the pK of the weak acid HA if a solution containing 0.1M HA and 0.2M A has a pH of 6.5?
Consider this reaction from lactic acid fermentation, in the forward direction only: pyruvate + NADH + H+ ? lactic acid + NAD+ Answer and briefly explain.
What experiment could be performed to ascertain if an antimicrobial agent is bactericidal or bacteriostatic? Can a bacteriostatic agent become bactericidal in the long run or vice versa? Why?
What would happen to the membrane potential if a cell suddenly becomes more permeable to Na+?
Mendel crossed pea plants that were PP dd (purple flowers and short stems) with pp DD (white flowers and tall stems), and self-pollinated the F1 to obtain an F2. The two loci assort independently.
In garden peas, grey seed coat color is dominant to white seed coat color. In the following cross, the phenotypes of the parents and offspring are known, but the genotypes are unknown.
Determine the ultimate effect in an XY human with its SRY gene mutated, many mating were made among all-white cats. The progent from these mating showed the following phenotypic frequency,
Before freezing, you count your cell suspension in the presence of trypan blue. The initial volume of thecell suspension is 10ml. You add 0.1ml of the cell suspension to 0.1ml of trpan blue.
Discuss similarities and differences gram-positive and gram-negative cell walls with regard to sensitivity to antimicrobial agents, resistance to phagocytosis.
On a field trip, a student in a marine biology class collects an organism that has differentiated organs, cell walls of cellulose, and chloroplasts with chlorophyll a.
What is the frequency of heterozygotes Aa in a randomly mating population in which the frequency of all dominant phenotypes is 0.19? The answer key says it 0.18. Can someone please explain why.
You are to convert the 5 mM fumaric acid in a waste stream into malate using fumarase immobilized on nonporous spherical particles. The enzyme has a turnover number of 23/sec, and a Km of 1.55 mM.
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