The correct answer is the control variable. For example, if you want to measure how men and women like cats, you would present the same cats to all the people (that;s the constant variables) and gender is your control variable.
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<span>The operon binds to the RNA polymerase and releases the repressor.</span><span>
Amino acids like tryptophan and tyrosine are used to produce neurotransmitters and other products. Hormones such a serotonin and melatonin are made products of tryptophan as well as norepinephrine and adrenalin.</span>
Answer:
A. Indigestible fiber
Explanation:
Humans cannot digest cellulose, but it is still important in the diet as a fiber.
The material that are used by biotechnologists would be C. Restriction endomuclease. These are specialized group of enzymes that can cleave or break multiple phosphodiester bonds between DNA sequences.
