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The building blocks of sucrose are _______ and _______

A.

glycerol and glycerol

B.

glucose and glucose

C.

glucose and fructose

D.

glucose and galactose

Answer and Explanation

The Correct Answer is C

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.


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Related Questions

Correct Answer is B

Explanation

Electrolytes are essential for numerous physiological processes, and are critical for maintaining homeostasis. Electrolytes such as sodium, potassium, calcium, and chloride regulate nerve and muscle function, fluid balance, blood pressure, and acid-base equilibrium, all of which are essential for normal body function.

Correct Answer is B

Explanation

A. Detoxification of certain chemicals, such as drugs or pesticides: The smooth endoplasmic reticulum contains enzymes that modify and detoxify harmful substances, making them easier for the body to eliminate.

B. Protein synthesis in conjunction with ribosomes: Protein synthesis is primarily associated with the rough endoplasmic reticulum, which has ribosomes attached. The smooth ER does not participate directly in protein synthesis.

C. Lipid metabolism and cholesterol synthesis: The smooth ER is the main site for lipid and steroid hormone synthesis, including cholesterol, supporting membrane production and cellular signaling.

D. Breakdown of stored glycogen to form free glucose: The smooth ER in liver cells contains enzymes that catalyze glycogen breakdown, contributing to glucose release into the blood to maintain energy homeostasis.

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