Answer:
to add nucleotides to a DNA primer
Explanation:
The Polymerase Chain Reaction (PCR) is a technique widely used in molecular biology in order to amplify small segments of DNA (100 to 1000 bases). PCR uses a thermostable DNA Taq polymerase that adds nucleotides to the DNA template at the position specified by short single-stranded DNA primers that bind to this template by complementary base pairing during the annealing phase of the PCR cycle. Subsequently, the DNA polymerase adds deoxynucleotide triphosphates (dNTPs) to the opposite DNA strand, this phase of the PCR cycle is known as the elongation phase. Finally, the resulting double-stranded DNA fragment is separated by heat during the denaturation step and this 3-step PCR cycle is repeated many times to amplify the target DNA region.
Answer:
The correct answer is c. "enhance the binding of norepinephrine to its receptors".
Explanation:
Monamine oxidase inhibitors (MAO inhibitors) were the first antidepressant drugs to be developed and cause the accumulation of norepinephrine, dopamine, and serotonin. MAO inhibitors function by inhibiting the activity of enzymes that broke down these compounds. The accumulation of norepinephrine enhance the binding of norepinephrine to its receptors, allowing for a higher effect of norepinephrine.
The right answer is 4).
The cytoskeleton is made up of biological polymers of proteins, sometimes called fibers because of their large size at the cellular level. They are classified into three categories:
Microfilaments: involves in cytoplasmic phenomena (division, endocytosis, migration).
Intermediate filaments: Maintenance of the nucleus structure.
Microtubules: Involved in the separation of chromosomes during mitosis.
Answer:
Taft appointed a secretary of the interior who undid some of Roosevelt’s conservation work.
Explanation:
From Roosevelt's guidance, Taft had the little opponent for the Democratic appointment for the administrator in 1908 and easily destroyed William Jennings Bryan for the administration that November. In the White House, he concentrated on East Asia more than European interests and regularly occurred to prop up or eliminate Latin American powers. Taft asked decreases to trade charges, then a major cause of national revenue, but the resulting proposal was massively affected by special matters.
Embryo, egg, hatching, chick, adult chicken.
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