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Biomolecules Practice Questions

NEET · Chemistry · 1488 free MCQs with instant results and detailed explanations.

1488
Total
301
Easy
661
Medium
526
Hard

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Topics in Biomolecules

Vitamins 246
Nucleic Acids 228
Lipids 260
Carbohydrates 245
Proteins 254
Enzymes 255

Sample Questions from Biomolecules

Here are 10 sample questions. Start a quiz to get randomized questions with scoring.

Q1
Easy
What is the primary function of carbohydrates in living organisms?
A. Energy storage
B. Genetic information
C. Hormone production
D. Cell structure
Show Answer & Explanation
Correct Answer: A
Carbohydrates are primarily used by living organisms for energy storage and supply. They are the body's main source of fuel.
Q2
Easy
Which of the following is a monosaccharide?
A. Fructose
B. Sucrose
C. Lactose
D. Cellulose
Show Answer & Explanation
Correct Answer: A
Fructose is a monosaccharide, while sucrose and lactose are disaccharides, and cellulose is a polysaccharide.
Q3
Easy
What type of bond links monosaccharides to form disaccharides?
A. Ionic bond
B. Covalent bond
C. Hydrogen bond
D. Metallic bond
Show Answer & Explanation
Correct Answer: B
Monosaccharides are linked by glycosidic bonds, which are a type of covalent bond, to form disaccharides.
Q4
Medium
Which of the following carbohydrates is a disaccharide?
A. Sucrose
B. Glucose
C. Starch
D. Cellulose
Show Answer & Explanation
Correct Answer: A
Sucrose is a disaccharide composed of glucose and fructose units. Glucose is a monosaccharide, while starch and cellulose are polysaccharides.
Q5
Medium
What is the primary function of carbohydrates in living organisms?
A. Energy storage
B. Genetic information
C. Cellular structure
D. Catalysis of reactions
Show Answer & Explanation
Correct Answer: A
Carbohydrates mainly serve as a source of energy for cells, as they can be easily broken down to release energy. Other options do not primarily represent carbohydrate functions.
Q6
Medium
Which of the following monosaccharides is a ketose?
A. Glucose
B. Fructose
C. Galactose
D. Ribose
Show Answer & Explanation
Correct Answer: B
Fructose is a ketose because it has a ketone functional group, while glucose, galactose, and ribose are aldoses with aldehyde groups.
Q7
Medium
Which of the following is an example of a polysaccharide?
A. Maltose
B. Lactose
C. Cellulose
D. Galactose
Show Answer & Explanation
Correct Answer: C
Cellulose is a polysaccharide made up of many glucose units. Maltose and lactose are disaccharides, while galactose is a monosaccharide.
Q8
Hard
Which of the following carbohydrates is a reducing sugar?
A. Maltose
B. Sucrose
C. Starch
D. Glycogen
Show Answer & Explanation
Correct Answer: A
Maltose is a disaccharide that contains a free aldehyde group, making it a reducing sugar. Sucrose, on the other hand, does not have a free anomeric carbon and is non-reducing.
Q9
Hard
What is the primary structural difference between amylose and amylopectin?
A. Presence of alpha-1,4 and alpha-1,6 glycosidic bonds
B. Number of glucose units
C. Presence of nitrogen in amylopectin
D. Molecular weight only
Show Answer & Explanation
Correct Answer: A
Amylose is primarily composed of alpha-1,4 glycosidic bonds, while amylopectin contains both alpha-1,4 and alpha-1,6 bonds, leading to its branched structure.
Q10
Hard
How many chiral centers are present in glucose?
A. 4
B. 5
C. 3
D. 6
Show Answer & Explanation
Correct Answer: B
Glucose has five carbon atoms that can each form a tetrahedral arrangement with four different substituents, thus it has 4 chiral centers.

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Biomolecules — NEET Chemistry Practice Questions Online

This page contains 1488 practice MCQs for the chapter Biomolecules in NEET Chemistry. The questions are organized by difficulty — 301 easy, 661 medium, 526 hard — so you can choose the right level for your preparation.

Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 6 topics, giving you comprehensive coverage of the entire chapter.