STABACK Biology Semester One Final Review

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What is active transport?

Back

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, using energy in the form of ATP.

Front

What is the chemical composition of carbohydrates?

Back

Carbohydrates contain carbon, hydrogen, and oxygen in a 1:2:1 ratio.

Front

What factors affect the rate of photosynthesis?

Back

Factors include temperature, amount of water, amount of carbon dioxide, and light intensity. The amount of oxygen present does not affect the rate.

Front

What is activation energy in a chemical reaction?

Back

Activation energy is the minimum energy required to initiate a chemical reaction, often lowered by the presence of an enzyme.

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What is homeostasis?

Back

Homeostasis is the process by which biological systems maintain stability while adjusting to conditions that are optimal for survival.

Front

What is diffusion?

Back

Diffusion is the passive movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of passive transport of molecules across a cell membrane via specific transmembrane integral proteins.

Front

What role do enzymes play in biological reactions?

Back

Enzymes act as catalysts to speed up chemical reactions by lowering the activation energy required.

Front

What are macromolecules?

Back

Macromolecules are large, complex molecules that are essential for life, including carbohydrates, proteins, lipids, and nucleic acids.

Front

What is the function of the human organ systems?

Back

Human organ systems work together to perform complex functions necessary for survival and maintaining homeostasis.