Honors Biology Semester 1 Exam Review

Front

What is the direct source of energy for processes in our body?

Back

ATP (Adenosine Triphosphate) is the direct source of energy for cellular processes.

Front

What is the process of diffusion?

Back

Diffusion is the movement of substances from a high concentration to a low concentration.

Front

What role does mRNA play in protein synthesis?

Back

mRNA (messenger RNA) carries the genetic code from DNA to the ribosome for protein assembly.

Front

What is an independent variable in an experiment?

Back

The independent variable is the factor that is manipulated to observe its effect on another variable.

Front

Which trophic level receives the least amount of energy from the sun?

Back

The tertiary consumer typically receives the least amount of energy from the sun.

Front

Define autotrophs.

Back

Autotrophs are organisms that produce their own food, typically through photosynthesis.

Front

What is the function of ribosomes in a cell?

Back

Ribosomes are the sites of protein synthesis, where amino acids are assembled into proteins.

Front

Explain the concept of homeostasis.

Back

Homeostasis is the process by which living organisms maintain a stable internal environment despite external changes.

Front

What is the role of enzymes in biological reactions?

Back

Enzymes are catalysts that speed up chemical reactions in the body by lowering the activation energy.

Front

Define cellular respiration.

Back

Cellular respiration is the process by which cells convert glucose and oxygen into energy (ATP), carbon dioxide, and water.