Carbohydrates quiz #2 Flashcards
Carbohydrates quiz #2
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Which carbohydrate can be used by the body as an immediate source of energy?
Glucose is the carbohydrate that can be used by the body as an immediate source of energy. What is the primary function of carbohydrates attached to the exterior of cell membranes?
Carbohydrates attached to the exterior of cell membranes primarily function as chemical markers for cell recognition and communication. Which of the following is the part of the stem which transports sugars? A) Xylem B) Phloem C) Cambium D) Cortex
B) Phloem Which of the following polysaccharide functions in structure and support in a plant's cell wall? A) Starch B) Glycogen C) Cellulose D) Chitin
C) Cellulose Which polysaccharide is an important component in the structure of many animal and fungal cells?
Chitin is an important polysaccharide in the structure of many animal and fungal cells. What are the primary functions of carbohydrates in cells?
The primary functions of carbohydrates in cells include providing energy storage and structural support. What is the function of carbohydrates in the cell membrane?
Carbohydrates in the cell membrane function as recognition sites for cell-to-cell communication. What is the primary function of carbohydrates in the body?
The primary function of carbohydrates in the body is to provide energy. Which of the following cells transport sugars over long distances? A) Xylem cells B) Phloem cells C) Parenchyma cells D) Sclerenchyma cells
B) Phloem cells What function do carbohydrates fulfill in the plasma membrane?
Carbohydrates in the plasma membrane serve as recognition sites for cell signaling and communication. Which type of carbohydrates are chemical markers on cell membranes?
Oligosaccharides serve as chemical markers on cell membranes. Which of the following statements is true regarding fiber? A) It is a type of protein B) It is digestible by humans C) It aids in digestion D) It is a type of lipid
C) It aids in digestion Which of the following is a great source of carbohydrates? A) Meat B) Fish C) Bread D) Cheese
C) Bread Which polysaccharide is stored as an energy source in the body of animals?
Glycogen is the polysaccharide stored as an energy source in the body of animals. Carbohydrates are made up of which of the following monomers? A) Amino acids B) Nucleotides C) Monosaccharides D) Fatty acids
C) Monosaccharides Which of the following are sources of complex carbohydrates? A) Fruits B) Vegetables C) Whole grains D) All of the above
D) All of the above Which biomolecule is the primary source of energy in the human diet?
Carbohydrates are the primary source of energy in the human diet. Complex carbohydrates can be found in which of the following vegetables? A) Potatoes B) Lettuce C) Tomatoes D) Cucumbers
A) Potatoes What function is served by the carbohydrates attached to cell-surface proteins?
Carbohydrates attached to cell-surface proteins serve as recognition sites for cell signaling and communication. Which is the main use of carbohydrates in cells?
The main use of carbohydrates in cells is to provide energy and structural support. Complex carbohydrates are comprised of which of the following? A) Single sugar units B) Two sugar units C) Many sugar units D) No sugar units
C) Many sugar units Which of the following foods are the best sources of complex carbohydrates? A) White rice B) Whole grain bread C) Candy D) Soda
B) Whole grain bread Which nutrient class supplies glucose as the main source of energy for the body?
Carbohydrates supply glucose as the main source of energy for the body. What are carbohydrates and what is their defining structural feature?
Carbohydrates are carbon-based molecules characterized by the presence of multiple hydroxyl (–OH) groups. What is the general chemical formula for simple carbohydrates like glucose?
The general formula for simple carbohydrates is CnH2On, where n is the number of carbon atoms. What is the chemical formula of glucose?
The chemical formula of glucose is C6H12O6. What is an oligosaccharide and how many monosaccharide units does it contain?
An oligosaccharide contains between 2 and 20 covalently linked monosaccharide units. What is a trisaccharide?
A trisaccharide is an oligosaccharide composed of three monosaccharide units. What type of reaction forms polysaccharides from monosaccharides?
Polysaccharides are formed by dehydration synthesis reactions. What reaction breaks down polysaccharides into monosaccharides?
Hydrolysis reactions break down polysaccharides into monosaccharides. Which polysaccharide provides structural support in plant cell walls?
Cellulose provides structural support in plant cell walls. Which polysaccharide is used for energy storage in plants?
Starch is used for energy storage in plants. What is the monomer unit of carbohydrates?
The monomer unit of carbohydrates is the monosaccharide. What is dehydration synthesis and how does it relate to carbohydrates?
Dehydration synthesis is a reaction that joins monosaccharides by removing a water molecule, forming glycosidic bonds. What is the most abundant monosaccharide?
Glucose is the most abundant monosaccharide. What is the main storage form of glucose in plants?
Starch is the main storage form of glucose in plants. What is chitin and where is it found?
Chitin is a structural polysaccharide found in the exoskeletons of insects and crustaceans. What is the function of peptidoglycan?
Peptidoglycan is a structural polysaccharide that forms the cell walls of bacteria. What is the process called when two monosaccharides are joined together?
The process is called dehydration synthesis. What is required to break a glycosidic bond?
A water molecule is required to break a glycosidic bond during hydrolysis.
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