Biology ยท Chemistry
Carbohydrates and Biomolecules
986 Questions
Carbohydrates and biomolecules questions test your understanding of sugars, monosaccharides, and metabolic substrates. The topic covers food transportation in plants and the biochemical properties of sweeteners. Practicing these questions builds a strong foundation for exam preparation.
Disaccharides and monosaccharidesArtificial sweetenersGlycogen storagePlant food transportGlycoprotein hormones
Carbohydrates and Biomolecules Questions
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Carbohydrates
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Complex Carbohydrates
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Starch
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Simple Carbohydrates
D
Correct answer
Explanation
Simple carbohydrates are composed of single sugar units (monosaccharides) or double sugar units (disaccharides) that are rapidly broken down and absorbed by the body. Complex carbohydrates, like starch and fiber, consist of longer chains.
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for energy & repair
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to grow
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for seed production
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for nitrogen production
D
Correct answer
Explanation
Glucose is a sugar used by plants for energy, growth, and repair. Nitrogen is a separate nutrient obtained from the soil, not a product of glucose metabolism.
A
Correct answer
Explanation
Plants produce glucose through photosynthesis, which they can either use immediately for cellular respiration or store as starch for later use. This flexibility is essential for plant survival during periods without light.
B
Correct answer
Explanation
Carbohydrates are organic molecules consisting of carbon (C), hydrogen (H), and oxygen (O) atoms, typically in a 1:2:1 ratio.
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Energy
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Stored energy
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Fat
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Hair & fingernails
A
Correct answer
Explanation
Carbohydrates are the body's primary and preferred source of quick energy for cellular functions and physical activity.
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Amino Acids
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Monosacharides
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Nucleotides
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Fatty Acids
B
Correct answer
Explanation
Monosaccharides (simple sugars like glucose) are the monomer building blocks of carbohydrates. Amino acids build proteins, nucleotides build nucleic acids, and fatty acids are part of lipids.
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glucose
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carbohydrate
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proteins
A
Correct answer
Explanation
Glucose is a simple sugar (monosaccharide) with the chemical formula C6H12O6, which organisms use as a primary source of energy.
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Disaccharides
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Polysaccharides
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Amino Acids
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Monosaccharides
D
Correct answer
Explanation
Carbohydrates are composed of sugar units. Monosaccharides, such as glucose and fructose, are the simplest form of these units and serve as the building blocks for more complex carbohydrates like disaccharides and polysaccharides.
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RQ of Carbohydrate is 1
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RQ of Proteins is 0.8 - 0.9
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RQ of Malic acid is 1.33 and Oxalic acid is 4.0
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All
D
Correct answer
Explanation
The Respiratory Quotient (RQ) for carbohydrates is 1, for proteins is 0.8-0.9, and for organic acids like malic and oxalic acid, it is greater than 1 (1.33 and 4.0 respectively).
B
Correct answer
Explanation
The Respiratory Quotient (RQ) is the ratio of CO2 produced to O2 consumed. For carbohydrates, the ratio is 1.
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Simple
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Complex
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I don't know
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I don't want to answer
A
Correct answer
Explanation
Glucose is a monosaccharide, which is the simplest form of a carbohydrate.
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Starch, Carbohydrates, Glucose
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Enzyme, catalyst, Fat
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Carbohydrates, proteins, fat
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Rice, potatoes, pasta
C
Correct answer
Explanation
The three primary macronutrients (food molecules) required by the body are carbohydrates, proteins, and fats.
D
Correct answer
Explanation
Carbohydrates are a macronutrient that provides 4 calories per gram.
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disaccharide
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polysaccharide
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numerosaccharide
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big sugar
B
Correct answer
Explanation
A polysaccharide is a long chain of monosaccharides linked together. Disaccharides consist of only two units.
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monosaccharide
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polysaccharide
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amino acid
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nucleic acid
A
Correct answer
Explanation
Carbohydrates are polymers made of repeating units called monosaccharides, such as glucose. Amino acids form proteins, and nucleotides form nucleic acids.