Answer:
Part A: False
Part B: Liver enzymes may activate some innocuous compounds, making them mutagenic
Explanation:
The Ames test, also known as <em>Salmonella typhimurium</em> reverse mutation assay, is a bacterial short-term technique used to identify if a particular chemical compound may cause mutations in target cells. It has been shown that there exists a positive correlation between carcinogenicity and mutagenicity in the Ames test, but this correlation is not absolute. In the Ames test, a rat liver homogenate (containing liver enzymes) can be added in order to identify substances that are not mutagenic themselves but are metabolized in order to form a mutagen (e.g., benzopyrene).
Answer;
The nervous system is composed of two basic cell types, namely, the Neurons and the neuroglial cells.
Explanation;
The nervous tissue is the main component of the nervous system which includes the brain, spinal cords and the nerves. It is a specialized tissue found in the central nervous system (brain and the spinal cord) and the peripheral nervous system (nerves). It consist of the neurons and the supporting cells called neuroglia.
The neurons are responsible for conducting and generating nerve impulses.
Neuroglial or glia cells are involved in many specialized functions apart from supporting of the neurons. There are six in number; four in the CNS and two in the PNS.
<span>Phosphorus cycles between living things and the environment, particularly the soil. This is the case with many other substances as well such as carbon. The cycling occurs due to the action of organisms which uptake and release phosphorus into the soil. Phosphorus exists in animals in many forms, particularly in the ATP molecule. When the animal dies, its remains are decomposed and the constituent ions are released into the soil, after which they are taken up by plants. Animals consuming these plants gain the phosphorus again, and the cycle continues.</span>
-binds to DNA during transcription and separates the DNA strands
-then uses one strand of DNA as a template from which to assemble nucleotides into a complementary strand of RNA. Hope this helped. ;)