If a binary signal is sent over a 3-khz channel whose signal-to-noise ratio is 20db, what is the maximum achievable data rate? ( analyze based on nyquist theorem and shannon theorem. maximum data rate is limited by the smaller value of nyquist limit and shannon limit. note that, the s/n in shannon equation is just a ratio, not in the unit of ‘db’.)

Which best describes the role or restriction enzymes in the analysis of edna a. to break dna into fragments that vary in size so they can be sorted and analyzed b. to amplify small amounts of dna and generate large amounts of dna for analysis c. to purify samples of dna obtained from the environment so they can be analyzed d. to sort different sizes of dna fragments into a banding pattern that can be analyzed