The term pollex refers to the

A. Glycerol and glycerol: Glycerol is a component of triglycerides and phospholipids, not a building block of sucrose. Pairing two glycerol molecules does not form a carbohydrate like sucrose.

B. Glucose and glucose: Two glucose molecules form maltose, a different disaccharide. Sucrose is not composed of two glucose units.

C. Glucose and fructose: Sucrose is a disaccharide formed by the covalent bonding of one glucose molecule and one fructose molecule. This combination correctly represents the building blocks of sucrose.

D. Glucose and galactose: Glucose and galactose combine to form lactose, the sugar found in milk. This pairing does not produce sucrose.

A. Pinocytosis: Pinocytosis is the process by which cells engulf extracellular fluid and dissolved solutes. It is a form of “cell drinking” and occurs in many cell types but is not specialized for attacking pathogens.

B. Phagocytosis: Phagocytosis is the process by which certain cells, such as macrophages and neutrophils, engulf large particles, bacteria, or debris. It is a key mechanism in the immune response, allowing white blood cells to destroy pathogens.

C. Exocytosis: Exocytosis is the process of vesicles fusing with the plasma membrane to release substances outside the cell. While important for secretion, it is not the mechanism by which pathogens are engulfed.

D. Intracellular vesicular trafficking: This refers to the movement of vesicles within a cell to transport molecules between organelles. It is involved in normal cellular logistics but does not directly involve engulfing pathogens.