Free Carbohydrates MCQs with Answers
115 Carbohydrates MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Carbohydrates are organic compounds classified as monosaccharides, disaccharides and polysaccharides according to their structure and hydrolysis products. The topic covers glycosidic bonds, glucose and fructose, sucrose, lactose and maltose, starch, glycogen and cellulose, along with their roles in energy storage, structural support and food tests.
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115 questions · page 3 of 6
- A. High molecular weight
- B. Insoluble in water
- C. Tasteless
- D. Polymers of glucose
Explanation: The correct answer is High molecular weight. Polysaccharides are large and complex carbohydrates made up of many monosaccharide units…
Correct answer: High molecular weight- A. Ester
- B. Peptide
- C. Glycosidic
- D. Phosphodiester
Explanation: The correct answer is glycosidic. Amylase is an enzyme that catalyzes the breakdown of carbohydrates, specifically starch, into simpler…
Correct answer: Glycosidic- A. Chitin
- B. Starch
- C. Cellulose
- D. Glycogen
Explanation: Chitin is the correct answer because it is a polysaccharide that contains nitrogen, specifically in its N-acetylglucosamine monomers.
Correct answer: Chitin- A. 1,4 Glycosidic Linkage
- B. 1,2 Glycosidic Linkage
- C. 1,6 Glycosidic Linkage
- D. 1,3 Glycosidic Linkage
Explanation: In a sucrose molecule, the 1 carbon of glucose is connected to the 2 carbon of fructose, so this bond is called a 1,2 glycosidic linkage.
Correct answer: 1,2 Glycosidic Linkage- A. Carbon, nitrogen, and potassium
- B. Carbon, hydrogen, and chlorine
- C. Carbon, nitrogen, and oxygen
- D. Carbon, hydrogen, and oxygen
Explanation: Carbohydrates, as the name suggests, contains the elements carbon , hydrogen and oxygen. A typical example would be glucose.
Correct answer: Carbon, hydrogen, and oxygen- A. Glucose (C6H12O5)
- B. Sucrose (C2H2O)
- C. Rhamnose (C6H12O5)n
- D. Lactic acid (C3H6O3)
Explanation: Lactic acid is an organic molecule. Its chemical formula is C3H6O3 Lactic acid has the same proportion of carbon, hydrogen and oxygen as…
Correct answer: Lactic acid (C3H6O3)- A. Starch
- B. Maltose
- C. Sucrose
- D. Lactose
Explanation: When sucrose is hydrolyzed, one molecule each of α D -glucose and β D fructose.
Correct answer: Sucrose- A. Lactose and Glucose
- B. Lactose and Fructose
- C. Glucose and fructose
- D. Glucose and galactose
Explanation: Sucrose, also known as table sugar, is a disaccharide that is hydrolyzed into two monosaccharides: glucose and fructose.
Correct answer: Glucose and fructose- A. Sucrose, Glucose and Fructose
- B. Maltose, Lactose and Fructose
- C. Glycogen, Sucrose and Maltose
- D. Glycogen, Cellulose and Starch
Explanation: Polysaccharides are complex long-chain carbohydrates that are formed by dehydrate synthesis or polymerization of more than 10 but…
Correct answer: Glycogen, Cellulose and Starch- A. Sucrose
- B. Lactose
- C. Maltose
- D. Amylose
Explanation: Lactose, a disaccharide composed of glucose and galactose, contains a beta-1,4-glycosidic linkage.
Correct answer: Lactose- A. Cx(H2O)x
- B. C6H12O6
- C. Cx(H2O)y
- D. Cx(HO)y
- E. Cx(H2O2)y
Explanation: Carbohydrates are the instant sources of energy in living organisms. The general carbohydrate formula is Cx(H2O)y, where x and y are…
Correct answer: Cx(H2O)y- A. 1, 4 glycosidic linkage
- B. 1, 6 glycosidic linkage
- C. 1,2 glycosidic linkage
- D. 1,3 glycosidic linkage
Explanation: Fructose and glucose combine through condensation process to form sucrose.
Correct answer: 1,2 glycosidic linkage- A. Monosaccharides
- B. Oligosaccharides
- C. Polysaccharides
- D. Carbohydrates
Explanation: The formula (CH2O)n specifically describes monosaccharides, the simplest form of carbohydrates that consist of single sugar units.
Correct answer: Monosaccharides- A. Glycosidic bond
- B. Hydrogen bond
- C. Peptide bond
- D. Disulfide bond
Explanation: The correct answer is the glycosidic bond. This bond is a covalent linkage specifically formed between two monosaccharides, resulting in…
Correct answer: Glycosidic bond- A. i only
- B. ii only
- C. ii & iii
- D. i, iv & v
- E. i & v
Explanation: Explanation for this question will be added soon.
Correct answer: i & v- A. Triose
- B. Tetrose
- C. Pentose
- D. Hexose
- E. Heptose
Explanation: Explanation for this question will be added soon.
Correct answer: Tetrose- A. Sucrose
- B. Fructose
- C. Lactose
- D. Maltose
- E. Glycerose
Explanation: Explanation for this question will be added soon.
Correct answer: Lactose- A. It has a sweet taste
- B. It is found in fruits
- C. It rotates the plane of polarized light to left
- D. It exhibits mutarotation
Explanation: The explanation for this question will be added soon.
Correct answer: It rotates the plane of polarized light to left- A. C-H
- B. C-N
- C. C-O
- D. C-C
Explanation: Hydroxyl groups allow for the carbs to make glycosidic linkages which are the important bonds that allow for polymers.
Correct answer: C-O- A. Proteins
- B. Carbohydrates
- C. Lipids
- D. Vitamins
Explanation: Carbohydrates (example cellulose, starch, glycogen, glucose, fructose etc) are the most abundant biomolecules on earth.
Correct answer: Carbohydrates