Class 12th Chemistry Biomolecules Free Test Quiz for 2026 exam

Free Class 12 Chemistry Biomolecules MCQ Test Quiz for 2026 exam. Test questions on carbohydrates, proteins, vitamins, nucleic acids, and enzyme functions for effective revision.

Check 12th Chemistry Biomolecules Chapter Knowledge

Report a question

What's wrong with this question?

You cannot submit an empty report. Please add some details.

---

12th Chemistry: Biomolecules

1 / 10

1. Which among the following is the simplest sugar?

Glucose

Starch

Cellulose

None of these

2 / 10

2. A solution of D-glucose in water rotates the plane polarised light

to the right

to the left

to either side

None of these

3 / 10

3. The letter D and L in carbohydrates represent

its optical rotation

its mutarotation

its direct synthesis

its configuration

4 / 10

4. Which one is a disaccharide ?

Glucose

Fructose

Xylose

Sucrose

5 / 10

5. A carbohydrate that cannot be hydrolysed into simpler units is called

polysaccharides

trisaccharides

disachharides

monosaccharides

6 / 10

6. Which of the following carbohydrate does not correspond to the general formula Cx(H₂O)y ?

Glucose

2-Deoxyribose

Fructose

Arabinose

7 / 10

7. Which of the following reactions of glucose can be explained only by its cyclic structure?

Glucose forms pentaacetate

Glucose reacts with hydroxylamine to form an oxime

Pentaacetate of glucose does not react with hydroxylamine

Glucose is oxidised by nitric acid to gluconic acid

8 / 10

8. The function of glucose is to

provides energy

promote growth

prevent diseases

perform all above

9 / 10

9. Reducing sugars reduce.

only Fehling’s solution

only Tollen’s solution.

both (a) & (b)

neither (a) nor (b)

10 / 10

10. The α-D glucose and β-D glucose differ from each other due to difference in carbon atom with respect to its

conformation

configuration

number of OH groups

size of hemiacetal ring

Insert Full Name and email for result.

Full NameEmail

Your score is

Share this quiz with your friends and ask for test their knowledge.

LinkedIn Facebook

Quiz Score Card

Chapter wise chemistry mock test quiz

🧪 Carbohydrates
Understand the classification of carbohydrates into aldoses and ketoses. Dive into the details of monosaccharides like glucose and fructose, oligosaccharides such as sucrose, lactose, and maltose, and explore polysaccharides like starch, cellulose, and glycogen. Learn their structures and biological importance in living organisms.

🧬 Proteins
Get an overview of α-amino acids and their role in protein formation. Study peptide bonds and polypeptides, and gain a qualitative understanding of the structural levels of proteins: primary, secondary, tertiary, and quaternary. Learn about protein denaturation and the crucial role enzymes play in biochemical reactions.

💊 Vitamins
Explore the classification of vitamins (water-soluble and fat-soluble) and their essential functions in the human body. Understand their role in maintaining health and supporting vital physiological processes.

🧬 Nucleic Acids
Discover the molecular basis of life through DNA and RNA. Learn their structures, functions, and how they carry genetic information and direct protein synthesis in cells.

FAQ

Total Views: 12

Swati Kumari

I am an experienced chemistry teacher and content developer specializing in chemistry and science subjects at QuizRanker. With a Master’s degree in Chemistry from Delhi University, I bring a deep understanding of the subject and a passion for teaching. In addition to creating engaging educational content, I offer personalized one-on-one live tutoring sessions for students. I am available to support learners in 11th and 12th grade chemistry, as well as science subjects for students up to 10th grade.

• Website
• Twitter
• Facebook