SOL Practice Questions - Flashcardzes 2

Front

What are enzymes?

Back

Enzymes are biological catalysts that speed up biochemical reactions by lowering the activation energy required for the reactions to occur.

Front

What is the role of enzymes in biochemical reactions?

Back

Enzymes lower the activation energy, making it easier for reactions to occur, thus facilitating metabolic processes.

Front

What is cell theory?

Back

Cell theory states that all living organisms are composed of cells, and cells are the basic unit of life.

Front

What evidence supports cell theory?

Back

Microscopic examination revealing cells as the basic unit of life supports cell theory.

Front

What is the relationship between photosynthesis and cellular respiration?

Back

Photosynthesis converts solar energy into chemical energy (glucose), while cellular respiration releases stored energy from organic molecules.

Front

What is the function of the phospholipid bilayer in cell membranes?

Back

The phospholipid bilayer regulates the passage of substances into and out of the cell.

Front

What are integral membrane proteins?

Back

Integral membrane proteins are proteins that span the entire membrane and are involved in transporting substances across the membrane.

Front

What is the significance of the peripheral membrane proteins?

Back

Peripheral membrane proteins are attached to the exterior or interior surfaces of the membrane and play roles in signaling and maintaining the cell's shape.

Front

What is the role of cholesterol in cell membranes?

Back

Cholesterol helps to stabilize the fluidity of the cell membrane, making it less permeable to very small water-soluble molecules.

Front

What happens to molecules in a concentration gradient?

Back

Molecules tend to move from an area of higher concentration to an area of lower concentration until equilibrium is reached.