Carbohydrates MCQs Based on One Shot Notes
Carbohydrates MCQs
Here are 50+ multiple choice questions (MCQs) with their answers related to carbohydrates in biochemistry:
- What is the general formula for carbohydrates?
- (a) Cn(H2O)nC_n(H_2O)_nCn(H2O)n
- (b) CH4CH_4CH4
- (c) CnH2OnC_nH_2O_nCnH2On
- (d) CnH2nOn+1C_nH_{2n}O_{n+1}CnH2nOn+1
Answer: (a) Cn(H2O)nC_n(H_2O)_nCn(H2O)n
- Which of the following is an example of an aldose?
- (a) Fructose
- (b) Ribulose
- (c) Glucose
- (d) Xylulose
Answer: (c) Glucose
- Which monosaccharide contains a ketone group?
- (a) Glucose
- (b) Fructose
- (c) Galactose
- (d) Mannose
Answer: (b) Fructose
- Disaccharides are composed of how many monosaccharides?
- (a) One
- (b) Two
- (c) Three
- (d) More than three
Answer: (b) Two
- Which of the following is a reducing sugar?
- (a) Sucrose
- (b) Lactose
- (c) Starch
- (d) Cellulose
Answer: (b) Lactose
- Which of the following polysaccharides is a structural component of plant cell walls?
- (a) Glycogen
- (b) Amylopectin
- (c) Cellulose
- (d) Amylose
Answer: (c) Cellulose
- Glycogen is primarily stored in which of the following tissues?
- (a) Liver and muscles
- (b) Heart and brain
- (c) Lungs and pancreas
- (d) Skin and adipose tissue
Answer: (a) Liver and muscles
- Which disaccharide is composed of glucose and fructose?
- (a) Maltose
- (b) Lactose
- (c) Sucrose
- (d) Cellobiose
Answer: (c) Sucrose
- Which of the following is not a monosaccharide?
- (a) Glucose
- (b) Ribose
- (c) Lactose
- (d) Mannose
Answer: (c) Lactose
- The breakdown of glycogen into glucose is called?
- (a) Glycogenesis
- (b) Glycogenolysis
- (c) Gluconeogenesis
- (d) Lipogenesis
Answer: (b) Glycogenolysis
- Which of the following carbohydrates is found in milk?
- (a) Fructose
- (b) Maltose
- (c) Lactose
- (d) Sucrose
Answer: (c) Lactose
- What is the basic unit of cellulose?
- (a) Glucose
- (b) Galactose
- (c) Ribose
- (d) Fructose
Answer: (a) Glucose
- What type of bond joins monosaccharides in a disaccharide?
- (a) Hydrogen bond
- (b) Glycosidic bond
- (c) Peptide bond
- (d) Ionic bond
Answer: (b) Glycosidic bond
- Which pathway is responsible for producing NADPH?
- (a) Glycolysis
- (b) HMP shunt
- (c) Citric Acid Cycle
- (d) Beta-oxidation
Answer: (b) HMP shunt
- Which of the following sugars is a non-reducing sugar?
- (a) Sucrose
- (b) Glucose
- (c) Maltose
- (d) Lactose
Answer: (a) Sucrose
- In the HMP shunt, what is the primary sugar used to generate ribose-5-phosphate?
- (a) Fructose-6-phosphate
- (b) Glucose-6-phosphate
- (c) Glyceraldehyde-3-phosphate
- (d) Pyruvate
Answer: (b) Glucose-6-phosphate
- Which enzyme is responsible for breaking down starch into maltose?
- (a) Amylase
- (b) Lactase
- (c) Sucrase
- (d) Cellulase
Answer: (a) Amylase
- The storage form of glucose in plants is?
- (a) Glycogen
- (b) Amylose
- (c) Amylopectin
- (d) Starch
Answer: (d) Starch
- Which of the following is a triose?
- (a) Ribose
- (b) Glucose
- (c) Glyceraldehyde
- (d) Erythrose
Answer: (c) Glyceraldehyde
- Which of the following is a homopolysaccharide?
- (a) Glycogen
- (b) Heparin
- (c) Hyaluronic acid
- (d) Chondroitin sulfate
Answer: (a) Glycogen
- What enzyme converts glucose-6-phosphate to fructose-6-phosphate in glycolysis?
- (a) Phosphofructokinase
- (b) Hexokinase
- (c) Phosphoglucoisomerase
- (d) Aldolase
Answer: (c) Phosphoglucoisomerase
- Which of the following polysaccharides is used for energy storage in animals?
- (a) Starch
- (b) Glycogen
- (c) Cellulose
- (d) Pectin
Answer: (b) Glycogen
- Which of the following is an epimer of glucose?
- (a) Mannose
- (b) Galactose
- (c) Fructose
- (d) Ribose
Answer: (b) Galactose
- The enzyme that converts glucose-6-phosphate to glucose is?
- (a) Glucose-6-phosphatase
- (b) Phosphoglucomutase
- (c) Hexokinase
- (d) Glucokinase
Answer: (a) Glucose-6-phosphatase
- Which of the following sugars is found in RNA?
- (a) Ribose
- (b) Deoxyribose
- (c) Glucose
- (d) Fructose
Answer: (a) Ribose
- Which of the following enzymes is involved in the non-oxidative phase of the HMP shunt?
- (a) Glucose-6-phosphate dehydrogenase
- (b) Transketolase
- (c) Phosphofructokinase
- (d) Hexokinase
Answer: (b) Transketolase
- Which of the following carbohydrates is a pentose sugar?
- (a) Ribose
- (b) Galactose
- (c) Mannose
- (d) Glucose
Answer: (a) Ribose
- Which disaccharide contains a beta-1,4 glycosidic bond?
- (a) Sucrose
- (b) Lactose
- (c) Maltose
- (d) Amylose
Answer: (b) Lactose
- Which polysaccharide consists of a branched chain structure?
- (a) Amylose
- (b) Amylopectin
- (c) Cellulose
- (d) Erythrose
Answer: (b) Amylopectin
- Which of the following is not a polysaccharide?
- (a) Chitin
- (b) Starch
- (c) Cellulose
- (d) Sucrose
Answer: (d) Sucrose
- Which of the following is an essential intermediate in gluconeogenesis?
- (a) Pyruvate
- (b) Citrate
- (c) Malate
- (d) Oxaloacetate
Answer: (d) Oxaloacetate
- Which of the following sugars is commonly known as table sugar?
- (a) Sucrose
- (b) Glucose
- (c) Fructose
- (d) Maltose
Answer: (a) Sucrose
- What is the storage form of carbohydrates in plants?
- (a) Amylose
- (b) Amylopectin
- (c) Starch
- (d) Glycogen
Answer: (c) Starch
- Which sugar is part of the structure of DNA?
- (a) Glucose
- (b) Ribose
- (c) Deoxyribose
- (d) Galactose
Answer: (c) Deoxyribose
- Which of the following is not part of the glycolytic pathway?
- (a) Pyruvate
- (b) Phosphoenolpyruvate
- (c) Malate
- (d) Fructose-1,6-bisphosphate
Answer: (c) Malate
- Which of the following enzymes catalyzes the first step of glycolysis?
- (a) Hexokinase
- (b) Phosphoglucomutase
- (c) Aldolase
- (d) Enolase
Answer: (a) Hexokinase
- Which of the following processes is involved in the formation of glucose from non-carbohydrate sources?
- (a) Glycolysis
- (b) Gluconeogenesis
- (c) Glycogenolysis
- (d) Lipolysis
Answer: (b) Gluconeogenesis
- Which polysaccharide is commonly referred to as “animal starch”?
- (a) Amylose
- (b) Glycogen
- (c) Cellulose
- (d) Pectin
Answer: (b) Glycogen
- Which enzyme is involved in converting fructose-6-phosphate to fructose-1,6-bisphosphate?
- (a) Phosphofructokinase
- (b) Aldolase
- (c) Enolase
- (d) Pyruvate kinase
Answer: (a) Phosphofructokinase
- In which pathway is glucose converted into pyruvate?
- (a) Glycolysis
- (b) Gluconeogenesis
- (c) Glycogenesis
- (d) Citric Acid Cycle
Answer: (a) Glycolysis
- Which sugar is considered an epimer of mannose?
- (a) Glucose
- (b) Ribose
- (c) Galactose
- (d) Fructose
Answer: (a) Glucose
- Which sugar is a ketose?
- (a) Galactose
- (b) Glucose
- (c) Mannose
- (d) Fructose
Answer: (d) Fructose
- Which enzyme breaks down maltose into glucose molecules?
- (a) Sucrase
- (b) Lactase
- (c) Maltase
- (d) Amylase
Answer: (c) Maltase
- Which of the following is a polysaccharide that acts as an energy reserve in plants?
- (a) Glycogen
- (b) Starch
- (c) Cellulose
- (d) Chitin
Answer: (b) Starch
- Which enzyme catalyzes the conversion of glucose to glucose-6-phosphate in the first step of glycolysis?
- (a) Phosphofructokinase
- (b) Glucokinase
- (c) Hexokinase
- (d) Pyruvate kinase
Answer: (c) Hexokinase
- Which sugar is a reducing sugar?
- (a) Sucrose
- (b) Lactose
- (c) Glucose
- (d) Both (b) and (c)
Answer: (d) Both (b) and (c)
- Which of the following is the most abundant carbohydrate in nature?
- (a) Glucose
- (b) Cellulose
- (c) Sucrose
- (d) Fructose
Answer: (b) Cellulose
- Which polysaccharide is a major component of the exoskeleton in arthropods?
- (a) Cellulose
- (b) Glycogen
- (c) Chitin
- (d) Pectin
Answer: (c) Chitin
- Which sugar is commonly found in DNA?
- (a) Glucose
- (b) Ribose
- (c) Deoxyribose
- (d) Fructose
Answer: (c) Deoxyribose
- What is the main function of glycogen in animals?
- (a) Structural support
- (b) Energy storage
- (c) Detoxification
- (d) Cellular communication
Answer: (b) Energy storage
- Which of the following polysaccharides is not digestible by humans?
- (a) Starch
- (b) Glycogen
- (c) Cellulose
- (d) Maltose
Answer: (c) Cellulose
- Which of the following molecules is involved in the regulation of blood glucose levels?
- (a) Glucagon
- (b) Insulin
- (c) Glycogen
- (d) All of the above
Answer: (d) All of the above
- Which pathway is used to break down glucose into pyruvate in cells?
- (a) HMP shunt
- (b) Glycolysis
- (c) Citric Acid Cycle
- (d) Gluconeogenesis
Answer: (b) Glycolysis
- Which enzyme converts pyruvate into oxaloacetate during gluconeogenesis?
- (a) Pyruvate carboxylase
- (b) Pyruvate dehydrogenase
- (c) Phosphoenolpyruvate carboxykinase
- (d) Aldolase
Answer: (a) Pyruvate carboxylase
- What is the final product of glycolysis?
- (a) Glucose
- (b) Fructose
- (c) Pyruvate
- (d) Ribose
Answer: (c) Pyruvate
- Which enzyme catalyzes the final step of glycolysis, converting phosphoenolpyruvate into pyruvate?
- (a) Pyruvate kinase
- (b) Phosphofructokinase
- (c) Hexokinase
- (d) Glucokinase
Answer: (a) Pyruvate kinase
- Which sugar is the major source of energy for cells?
- (a) Glucose
- (b) Fructose
- (c) Sucrose
- (d) Lactose
Answer: (a) Glucose
- Which of the following sugars is the sweetest?
- (a) Sucrose
- (b) Glucose
- (c) Fructose
- (d) Lactose
Answer: (c) Fructose
- What is the main product of the oxidative phase of the pentose phosphate pathway?
- (a) NADPH
- (b) ATP
- (c) FADH2
- (d) Glucose
Answer: (a) NADPH
- Which enzyme is responsible for breaking down cellulose in herbivores?
- (a) Cellulase
- (b) Amylase
- (c) Lactase
- (d) Sucrase
Answer: (a) Cellulase
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