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Biomolecules Practice Questions

JEE · Chemistry · 1164 free MCQs with instant results and detailed explanations.

1164
Total
263
Easy
446
Medium
455
Hard

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Topics in Biomolecules

Carbohydrates 173
Proteins 185
Nucleic Acids 174
Lipids 170
Vitamins 180
Enzymes 160
Hormones 122

Sample Questions from Biomolecules

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

Q1
Easy
Which of the following is a simple carbohydrate?
A. Glucose
B. Starch
C. Cellulose
D. Glycogen
Show Answer & Explanation
Correct Answer: A
Glucose is a monosaccharide, which makes it a simple carbohydrate, while the others are polysaccharides.
Q2
Easy
What is the general formula for monosaccharides?
A. C_nH_(2n)O_n
B. C_nH_(2n+1)OH
C. C_nH_(2n)O_(n-1)
D. C_nH_(2n+2)
Show Answer & Explanation
Correct Answer: A
Monosaccharides have the general formula C_nH_(2n)O_n, reflecting their structure with carbon, hydrogen, and oxygen.
Q3
Easy
Which carbohydrate is known as blood sugar?
A. Fructose
B. Maltose
C. Glucose
D. Sucrose
Show Answer & Explanation
Correct Answer: C
Glucose is referred to as blood sugar because it is the primary energy source for the body's cells.
Q4
Medium
Which of the following is a disaccharide?
A. Fructose
B. Cellulose
C. Sucrose
D. Galactose
Show Answer & Explanation
Correct Answer: C
Sucrose is a disaccharide composed of glucose and fructose, while the others are either monosaccharides or polysaccharides.
Q5
Medium
What is the primary storage form of carbohydrates in plants?
A. Glycogen
B. Starch
C. Cellulose
D. Fructose
Show Answer & Explanation
Correct Answer: B
Starch is the primary storage form of carbohydrates in plants, while glycogen serves this function in animals.
Q6
Medium
Which of the following carbohydrates forms a gel-like substance when mixed with water?
A. Glucose
B. Pectin
C. Lactose
D. Ribose
Show Answer & Explanation
Correct Answer: B
Pectin is known for its ability to form gels, especially when heated with sugar and acid.
Q7
Medium
What type of reaction occurs when glucose is converted to energy in the body?
A. Hydrolysis
B. Fermentation
C. Oxidation
D. Reduction
Show Answer & Explanation
Correct Answer: C
The process of converting glucose to energy involves oxidation, which releases energy.
Q8
Hard
Which of the following monosaccharides is an aldose?
A. Fructose
B. Galactose
C. Ribulose
D. Xylose
Show Answer & Explanation
Correct Answer: B
Galactose is an aldose because it contains an aldehyde functional group, whereas fructose is a ketose and the others are also ketoses.
Q9
Hard
Which of the following glycosidic bonds is formed between glucose and fructose to create sucrose?
A. α(1→2)
B. β(1→2)
C. α(1→4)
D. β(1→4)
Show Answer & Explanation
Correct Answer: A
Sucrose is formed by an α(1→2) glycosidic bond between the alpha anomeric carbon of glucose and the beta anomeric carbon of fructose.
Q10
Hard
What is the result of hydrolyzing a disaccharide?
A. Formation of a monosaccharide
B. Formation of two monosaccharides
C. Formation of polysaccharides
D. Formation of oligosaccharides
Show Answer & Explanation
Correct Answer: B
Hydrolysis of a disaccharide breaks the glycosidic bond, resulting in two monosaccharides.

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Biomolecules — JEE Chemistry Practice Questions Online

This page contains 1164 practice MCQs for the chapter Biomolecules in JEE Chemistry. The questions are organized by difficulty — 263 easy, 446 medium, 455 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 7 topics, giving you comprehensive coverage of the entire chapter.