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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81. 'Biomolecules' such as starch, cellulose and glycogen yield which of the following upon hydrolysis?
- A. Maltose
- B. Sucrose
- C. Glucose
- D. Galactose
Explanation: Option C is correct since the three most abundant polysaccharides, starch, glycogen, and cellulose ( referred to as homopolymers) yield…
Correct answer: Glucose- A. 1000
- B. 2000
- C. 3 to 7000
- D. 3000 and more
Explanation: Option C is correct since the general formula of carbohydrates is Cx(h20)y where x is a whole number from 3 to many thousand whereas y may…
Correct answer: 3 to 7000- A. Maltose
- B. Sucrose
- C. Lactose
- D. All of these
Explanation: Maltose is the immediate product of digestion of starch. Sucrose is the tranport sugar in plants. Lactose is the sugar present in milk.
Correct answer: All of these- A. Monosaccharides
- B. Amino acids
- C. Fatty acids
- D. All
Explanation: Monosaccharide: The most basic, fundamental unit of a carbohydrate. These are simple sugars with the general chemical structure of C6H12O6.
Correct answer: Monosaccharides- A. Enzymes
- B. Coenzymes
- C. Vitamins
- D. Antibiotics
Explanation: Metabolically-important species that include phosphorylated ribose include ADP, ATP, coenzyme A, and NADH. Thus, option B is correct.
Correct answer: Coenzymes- A. Starch
- B. Cellulose
- C. Glycogen
- D. All of these
Explanation: Out of all the options, the most abundant carbohydrate in animals is glycogen.
Correct answer: Glycogen- A. Glycosidic Bond
- B. Hydrogen Bond
- C. Peptide Bond
- D. Disulphide
Explanation: A glycosidic bond or glycosidic linkage is a type of covalent bond that joins a carbohydrate (sugar) molecule to another group.
Correct answer: Glycosidic Bond- A. Carboan, water and oxygen
- B. Carbon, Sulphur and hydrogen
- C. Carbon, calcium and hydrogen
- D. Carbon, ahydrogen and oxygen
Explanation: Carbohydrates are organic molecules, which are built out of carbon, hydrogen and oxygen molecules
Correct answer: Carbon, ahydrogen and oxygen- A. β-D-glucose
- B. α--glucose
- C. γ-D-glucose
- D. α-L-glucose
Explanation: Starch is a polysaccharide composed of repeating units of alpha-glucose molecules joined together through glycosidic bonds.
Correct answer: α--glucose- A. Waxes
- B. Glycerol
- C. Starch
- D. Cellulose
Explanation: Cellulose is the most abundant carbohydrate in nature due to its role as a structural component in the cell walls of plants.
Correct answer: Cellulose- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: This structure shows a six-membered ring (pyranose form) with the OH group on the anomeric carbon (carbon-1) pointing down relative to the…
Correct answer: Option A- A. Glycosidic Bond
- B. Keto group
- C. Maltose
- D. Fructose
Explanation: Monosaccharides are polyhydroxy aldehydes or polyhydroxy ketones. This implies that monosaccharides contain either an aldehyde group or a…
Correct answer: Keto group- A. Glucose
- B. Maltose
- C. Sucrose
- D. Mannose
Explanation: When starch is ultimately broken down into glucose molecules, this occurs after further hydrolysis of maltose or other intermediates.
Correct answer: Maltose- A. They are both polymers of glucose
- B. They are geometric isomers of each other
- C. They can both be digested by humans
- D. They are both used for energy storage in plants
Explanation: The statement that is true regarding both starch and cellulose is that they are both polymers of glucose.Both starch and cellulose are…
Correct answer: They are both polymers of glucose- A. Glucopyranose
- B. Ribofuranose
- C. Glyceraldehyde
- D. Acetaldehyde
Explanation: When most monosaccharides are in a solution, they tend to form ring structures.
Correct answer: Ribofuranose- A. Hydrolysis
- B. Oxidation
- C. Condensation
- D. Glycolysis
Explanation: Condensation is a chemical reaction in which two molecules combine to form a larger molecule, releasing a small molecule, often water, as…
Correct answer: Condensation- A. Fructose
- B. Glucose
- C. Ribose
- D. Deoxyribose
Explanation: Typically, glucose forms a six-membered ring called a pyranose. This ring consists of five carbon atoms and one oxygen atom.
Correct answer: Glucose- A. 2
- B. 4
- C. 10
- D. 18
Explanation: 4 percent is correct option according to books4% is a reasonable and commonly accepted value that accounts for the total carbohydrate…
Correct answer: 4- A. Glycogen
- B. Collagen
- C. Starch
- D. Cellulose
Explanation: The correct answer is Option B: Collagen. Collagen is a protein, not a carbohydrate, and is essential for the structure and strength of…
Correct answer: Collagen- A. polysaccharides
- B. disaccharides
- C. monosaccharides
- D. oligosaccharides
Explanation: Disaccharides are carbohydrates composed of two sugar units joined by a glycosidic bond.
Correct answer: disaccharides