End of year review

Front

What is a hypothesis?

Back

An observation or prediction that can be tested.

Front

What is a theory in scientific terms?

Back

A well-substantiated explanation of an aspect of the natural world, based on a body of evidence.

Front

What does the fluid mosaic model describe?

Back

A plasma membrane is a mosaic of components that move freely and fluidly.

Front

What is competitive inhibition?

Back

A situation where a molecule can occupy the same active site as the substrate, preventing the substrate from binding.

Front

What are chromosomes?

Back

23 pairs of DNA 'packages' shown in a karyotype.

Front

What is the difference between a law and a theory?

Back

A law describes a universal principle, while a theory explains why that principle occurs.

Front

What is natural selection?

Back

The process by which organisms better adapted to their environment tend to survive and produce more offspring.

Front

What is the role of enzymes in biological reactions?

Back

Enzymes act as catalysts to speed up chemical reactions without being consumed.

Front

What is allosteric regulation?

Back

A process where the binding of a molecule at one site affects the activity at another site on the enzyme.

Front

What is feedback inhibition?

Back

A regulatory mechanism where the end product of a metabolic pathway inhibits an enzyme involved in its production.