Q. Which biomolecule is primarily responsible for storing genetic information?
A.
Proteins
B.
Lipids
C.
Carbohydrates
D.
Nucleic acids
Show solution
Solution
Nucleic acids, such as DNA and RNA, are responsible for storing and transmitting genetic information.
Correct Answer:
D
— Nucleic acids
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Q. Which biomolecule is primarily responsible for the genetic information in cells?
A.
Proteins
B.
Lipids
C.
Nucleic acids
D.
Carbohydrates
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Solution
Nucleic acids, such as DNA and RNA, are responsible for storing and transmitting genetic information.
Correct Answer:
C
— Nucleic acids
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Q. Which biomolecule is primarily responsible for the storage of genetic information?
A.
Proteins
B.
Lipids
C.
Nucleic acids
D.
Carbohydrates
Show solution
Solution
Nucleic acids, such as DNA and RNA, are responsible for storing and transmitting genetic information.
Correct Answer:
C
— Nucleic acids
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Q. Which biomolecule is primarily responsible for the structure of cell membranes?
A.
Proteins
B.
Carbohydrates
C.
Nucleic acids
D.
Lipids
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Solution
Lipids, particularly phospholipids, are the main components of cell membranes.
Correct Answer:
D
— Lipids
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Q. Which biomolecule is used for energy storage in animals?
A.
Glycogen
B.
Cellulose
C.
Starch
D.
Chitin
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Solution
Glycogen is the primary form of energy storage in animals.
Correct Answer:
A
— Glycogen
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Q. Which biomolecule is used for quick energy?
A.
Proteins
B.
Lipids
C.
Carbohydrates
D.
Nucleic acids
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Solution
Carbohydrates are primarily used for quick energy by living organisms.
Correct Answer:
C
— Carbohydrates
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Q. Which biomolecule serves as the main component of cell membranes?
A.
Proteins
B.
Carbohydrates
C.
Nucleic acids
D.
Phospholipids
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Solution
Phospholipids are the main component of cell membranes, forming a bilayer structure.
Correct Answer:
D
— Phospholipids
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Q. Which bond is primarily responsible for the secondary structure of proteins?
A.
Ionic bonds
B.
Hydrogen bonds
C.
Disulfide bonds
D.
Peptide bonds
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Solution
The secondary structure of proteins, such as alpha-helices and beta-sheets, is stabilized by hydrogen bonds between the backbone atoms.
Correct Answer:
B
— Hydrogen bonds
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Q. Which carbohydrate is a structural component of plant cell walls?
A.
Starch
B.
Glycogen
C.
Cellulose
D.
Fructose
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Solution
Cellulose is a polysaccharide that provides structural support in plant cell walls.
Correct Answer:
C
— Cellulose
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Q. Which carbohydrate is commonly used as a sweetener?
A.
Lactose
B.
Maltose
C.
Fructose
D.
Cellulose
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Solution
Fructose is commonly used as a sweetener due to its high sweetness level.
Correct Answer:
C
— Fructose
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Q. Which carbohydrate is found in milk?
A.
Lactose
B.
Maltose
C.
Glucose
D.
Fructose
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Solution
Lactose is the sugar found in milk, composed of glucose and galactose.
Correct Answer:
A
— Lactose
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Q. Which carbohydrate is found in the structure of DNA?
A.
Glucose
B.
Ribose
C.
Fructose
D.
Mannose
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Solution
Ribose is the sugar component of RNA, while deoxyribose is found in DNA.
Correct Answer:
B
— Ribose
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Q. Which carbohydrate is known as blood sugar?
A.
Galactose
B.
Fructose
C.
Glucose
D.
Ribose
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Solution
Glucose is commonly referred to as blood sugar as it is the primary energy source for the body's cells.
Correct Answer:
C
— Glucose
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Q. Which carbohydrate is primarily stored in animal liver and muscle?
A.
Cellulose
B.
Starch
C.
Glycogen
D.
Fructose
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Solution
Glycogen is the carbohydrate primarily stored in animal liver and muscle as a form of energy reserve.
Correct Answer:
C
— Glycogen
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Q. Which enzyme breaks down starch into glucose?
A.
Amylase
B.
Lactase
C.
Sucrase
D.
Cellulase
Show solution
Solution
Amylase is the enzyme that catalyzes the hydrolysis of starch into glucose.
Correct Answer:
A
— Amylase
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Q. Which enzyme is responsible for the hydrolysis of starch?
A.
Amylase
B.
Cellulase
C.
Lactase
D.
Maltase
Show solution
Solution
Amylase is the enzyme that catalyzes the hydrolysis of starch into sugars.
Correct Answer:
A
— Amylase
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Q. Which level of protein structure is characterized by the arrangement of multiple polypeptide chains?
A.
Primary structure
B.
Secondary structure
C.
Tertiary structure
D.
Quaternary structure
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Solution
The quaternary structure of a protein refers to the arrangement and interaction of multiple polypeptide chains.
Correct Answer:
D
— Quaternary structure
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Q. Which level of protein structure is characterized by the overall 3D shape of a single polypeptide chain?
A.
Primary structure
B.
Secondary structure
C.
Tertiary structure
D.
Quaternary structure
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Solution
The tertiary structure of a protein refers to the overall 3D shape of a single polypeptide chain, determined by interactions among side chains.
Correct Answer:
C
— Tertiary structure
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Q. Which of the following amino acids contains a sulfur atom?
A.
Cysteine
B.
Serine
C.
Glutamine
D.
Alanine
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Solution
Cysteine is the amino acid that contains a sulfur atom in its side chain, which can form disulfide bonds.
Correct Answer:
A
— Cysteine
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Q. Which of the following amino acids is essential in the human diet?
A.
Glycine
B.
Alanine
C.
Lysine
D.
Serine
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Solution
Lysine is an essential amino acid that must be obtained through the diet, while glycine, alanine, and serine can be synthesized by the body.
Correct Answer:
C
— Lysine
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Q. Which of the following biomolecules is primarily responsible for storing genetic information?
A.
Proteins
B.
Lipids
C.
Carbohydrates
D.
Nucleic acids
Show solution
Solution
Nucleic acids, such as DNA and RNA, are responsible for storing and transmitting genetic information.
Correct Answer:
D
— Nucleic acids
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Q. Which of the following carbohydrates is a disaccharide?
A.
Maltose
B.
Ribose
C.
Cellulose
D.
Glycogen
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Solution
Maltose is a disaccharide formed from two glucose units.
Correct Answer:
A
— Maltose
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Q. Which of the following carbohydrates is a ketose?
A.
Glucose
B.
Fructose
C.
Galactose
D.
Mannose
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Solution
Fructose is a ketose sugar, while glucose and galactose are aldoses.
Correct Answer:
B
— Fructose
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Q. Which of the following carbohydrates is a reducing sugar?
A.
Fructose
B.
Sucrose
C.
Maltose
D.
Cellulose
Show solution
Solution
Maltose is a reducing sugar because it has a free aldehyde or ketone group, while sucrose does not.
Correct Answer:
C
— Maltose
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Q. Which of the following carbohydrates is not digestible by humans?
A.
Starch
B.
Glycogen
C.
Cellulose
D.
Maltose
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Solution
Cellulose is not digestible by humans due to the lack of enzymes to break it down.
Correct Answer:
C
— Cellulose
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Q. Which of the following is a carbohydrate?
A.
Glucose
B.
Amino acid
C.
Fatty acid
D.
Nucleotide
Show solution
Solution
Glucose is a simple sugar and a primary carbohydrate.
Correct Answer:
A
— Glucose
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Q. Which of the following is a characteristic of carbohydrates?
A.
High energy density
B.
Soluble in organic solvents
C.
Hydrophilic nature
D.
Insoluble in water
Show solution
Solution
Carbohydrates are generally hydrophilic, meaning they are soluble in water.
Correct Answer:
C
— Hydrophilic nature
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Q. Which of the following is a characteristic of cellulose?
A.
Soluble in water
B.
Composed of glucose units
C.
Used for energy storage
D.
Contains α-1,4 glycosidic bonds
Show solution
Solution
Cellulose is composed of glucose units linked by β-1,4 glycosidic bonds and is not soluble in water.
Correct Answer:
B
— Composed of glucose units
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Q. Which of the following is a characteristic of enzymes?
A.
They are consumed in reactions
B.
They increase the activation energy
C.
They are specific to substrates
D.
They function at all temperatures
Show solution
Solution
Enzymes are highly specific to their substrates, allowing them to catalyze specific biochemical reactions.
Correct Answer:
C
— They are specific to substrates
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Q. Which of the following is a characteristic of fibrous proteins?
A.
Soluble in water
B.
Structural role
C.
Globular shape
D.
Enzymatic activity
Show solution
Solution
Fibrous proteins are typically insoluble in water and serve structural roles in cells and tissues.
Correct Answer:
B
— Structural role
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Showing 61 to 90 of 142 (5 Pages)
Biomolecules MCQ & Objective Questions
Biomolecules are fundamental to understanding life processes and are a crucial part of your curriculum. Mastering this topic can significantly enhance your exam performance, especially in competitive settings. Practicing MCQs and objective questions on biomolecules helps you grasp essential concepts and prepares you for important questions that frequently appear in exams.
What You Will Practise Here
Structure and function of carbohydrates, proteins, lipids, and nucleic acids
Key biochemical pathways and their significance
Important definitions and terminologies related to biomolecules
Diagrams illustrating molecular structures and interactions
Formulas related to biomolecular calculations
Applications of biomolecules in health and disease
Comparative analysis of different types of biomolecules
Exam Relevance
The topic of biomolecules is highly relevant in various examinations, including CBSE, State Boards, NEET, and JEE. Questions often focus on the identification of structures, functions, and pathways associated with biomolecules. You can expect multiple-choice questions that assess your understanding of definitions, applications, and the ability to analyze diagrams. Familiarity with these patterns will greatly enhance your exam readiness.
Common Mistakes Students Make
Confusing the structures and functions of different biomolecules
Overlooking the significance of diagrams in understanding molecular interactions
Misinterpreting biochemical pathways and their implications
Neglecting to memorize key definitions and terms
Failing to apply theoretical knowledge to practical scenarios
FAQs
Question: What are the main types of biomolecules?Answer: The main types of biomolecules include carbohydrates, proteins, lipids, and nucleic acids.
Question: How can I effectively prepare for biomolecules questions in exams?Answer: Regular practice of MCQs, understanding key concepts, and reviewing diagrams will help you prepare effectively.
Don't wait any longer! Start solving practice MCQs on biomolecules today to solidify your understanding and boost your confidence for the upcoming exams. Your success is just a question away!