Marxism

Marxism is both the theory and the political practice (that is, the praxis) derived from the work of Karl Marx and Friedrich Engels. Any political practice or theory that is based on an interpretation of the works of Marx and Engels may be called Marxism; this includes different forms of politics and thought such as those of Communist Parties and Communist states, as well as academic research across many fields. And while there are many theoretical and practical differences among the various forms of Marxism, most forms of Marxism share:

• an attention to the material conditions of people's lives, and social relations among people
• a belief that people's consciousness of the conditions of their lives reflects these material conditions and relations
• an understanding of class in terms of differing relations of production, and as a particular position within such relations
• an understanding of material conditions and social relations as historically malleable
• a view of history according to which class struggle, the evolving conflict between classes with opposing interests, structures each historical period and drives historical change
• a sympathy for the working class or proletariat
• and a belief that the ultimate interests of workers best match those of humanity in general.

Gene expression

Gene expression first involves transcription, in which DNA is used as a template to produce RNA. In the case of genes encoding proteins, that RNA produced from this process is messenger RNA (mRNA), which then needs to be translated by ribosomes to form a protein. As ribosomes are located outside the nucleus, mRNA produced needs to be exported.

Since the nucleus is the site of transcription, it also contains a variety of proteins which either directly mediate transcription or are involved in regulating the process. These proteins include helicases that unwind the double-stranded DNA molecule to facilitate access to it, RNA polymerases that synthesize the growing RNA molecule, topoisomerases that change the amount of supercoiling in DNA, helping it wind and unwind, as well as a large variety of transcription factors that regulate expression.

Cognitive psychology

The nature of thought is another core interest in psychology. Cognitive psychology studies cognition, the mental processes underlying behavior. It uses information processing as a framework for understanding the mind. Perception, learning, problem solving, memory, attention, language and emotion are all well researched areas. Cognitive psychology is associated with a school of thought known as cognitivism, whose adherents argue for an information processing model of mental function, informed by positivism and experimental psychology.

Cognitive science is a conjoined enterprise of cognitive psychologists, neurobiologists, workers in artificial intelligence, logicians, linguists, and social scientists, and places a slightly greater emphasis on computational theory and formalization.

Metaphysics

Metaphysics is the branch of philosophy that investigates principles of reality transcending those of any particular science, traditionally, cosmology and ontology. It is also concerned with explaining the ultimate nature of being and the world.[1] Its name derives from the Greek words μετά (metá) (meaning "after") and φυσικά (physiká) (meaning "physics"), "physics" referring to those works on matter by Aristotle in antiquity. The prefix meta- ("after") simply meant the chapters in Aristotle's work that physically followed after the chapter "physics". Aristotle called them "first philosophy". Over time, the meaning of "meta" has shifted to mean "beyond; above; transcending" in English. Therefore, metaphysics is also the study of that which transcends physics.