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The McDonald–Kreitman test [1] is a statistical test often used by evolutionary and population biologists to detect and measure the amount of adaptive evolution within a species by determining whether adaptive evolution has occurred, and the proportion of substitutions that resulted from positive selection (also known as directional selection).
The plaque reduction neutralization test is used to quantify the titer of neutralizing antibody for a virus. [1] [2] The serum sample or solution of antibody to be tested is diluted and mixed with a viral suspension. This is incubated to allow the antibody to react with the virus. This is poured over a confluent monolayer of host cells.
The SAT Subject Test in Biology was the name of a one-hour multiple choice test given on biology by the College Board. A student chose whether to take the test depending upon college entrance requirements for the schools in which the student is planning to apply. Until 1994, the SAT Subject Tests were known as Achievement Tests; and from 1995 ...
Tajima's Neutrality Test — The purpose of Tajima's Neutrality Test is to assess the relationship between the number of segregating sites per site and nucleotide diversity. When alleles are selectively neutral the product 4Nv can be estimated in two ways. N represents the effective population size and v is the mutation rate per site.
The test was comprehensive and covered—in equal proportions—molecular biology, organismal biology, and ecology and evolution. [7] This exam, like all the GRE subject tests, was paper-based, as opposed to the GRE general test which is usually computer-based. It contains 194 questions which were to be answered within 2 hours and 50 minutes.
ATP is a molecule found only in and around living cells, and as such it gives a direct measure of biological concentration and health. ATP is quantified by measuring the light produced through its reaction with the naturally-occurring firefly enzyme luciferase using a luminometer.
Tests of sufficiency in biology are used to determine if the presence of an element permits the biological phenomenon to occur. In other words, if sufficient conditions are met, the targeted event is able to take place. However, this does not mean that the absence of a sufficient biological element inhibits the biological event from occurring.
The mean score for all test takers from July, 2009, to July, 2012, was 526 with a standard deviation of 95. [7] After learning that test content from editions of the GRE® Biochemistry, Cell and Molecular Biology (BCM) Test has been compromised in Israel, ETS made the decision not to administer this test worldwide in 2016–17.