A group of students carry out an experiment to extract DNA from strawberries. First, the students make up a mixture containing 3g of salt, 100 cm3 of water and 10 cm3 of detergent.
State one piece of measuring apparatus the students would use when making up the mixture.
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The trp operon in e. coli regulates genes that code for enzymes required for synthesis of the repressible operon. when tryptophan is not available amino acid tryptophan. the trp operon is a in the environment, the trp repressor protein activeinactiveregulated. therefore, rna polymerase can bind to the genes to begin transcription.

Ricardo notices that when he plays soccer in the rain, his ball does not seem to go as far after a kick. what is the best scientific question that ricardo could ask about this observation? is soccer better played in the rain or sun? how does rain affect the distance a soccer ball can travel? how does rain affect the speed of a soccer ball? is soccer affected by the rain?

The bacteria found in soil is usually harmful and measures are taken to remove any traces of microorganisms. true or false