NEET PYQ Biomolecules QUIZ - 30 MCQ Tests

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Biomolecules – 3 MCQ Tests

Each test contains 10 questions. Submit a test to see your score and the correct answers.

Test 1 – Carbohydrates & Lipids

1. Which of the following is a disaccharide?

Galactose Maltose Fructose Glucose

Correct answer: Maltose

2. Sugar found in the haemolymph of insects is called:

Maltose Lactose Trehalose Galactose

Correct answer: Trehalose

3. Carbohydrates are stored in mammals mainly as:

Glucose in liver Glycogen in spleen only Lactic acid in muscles Glycogen in liver and muscles

Correct answer: Glycogen in liver and muscles

4. Translocation of sugars in flowering plants occurs mainly in the form of:

Glucose Sucrose Fructose Maltose

Correct answer: Sucrose

5. Sucrose is composed of:

Glucose and fructose Glucose and glycogen Two molecules of glucose Glycogen and fructose

Correct answer: Glucose and fructose

6. Sugars with five-membered rings are called:

Pyranose Furanose Dextrorotatory Laevorotatory

Correct answer: Furanose

7. Amylose and amylopectin are components of:

Glycogen Starch Cellulose Chitin

Correct answer: Starch

8. Which disaccharide gives two molecules of glucose on hydrolysis?

Maltose Lactose Sucrose Fructose

Correct answer: Maltose

9. Which biomolecule produces more than twice the amount of energy compared with carbohydrates?

Protein Fats Vitamins Glucose

Correct answer: Fats

10. A typical fat molecule is made up of:

Three glycerol and one fatty acid One glycerol and one fatty acid One glycerol and three fatty acids Three glycerol and three fatty acids

Correct answer: One glycerol and three fatty acids

Test 2 – Proteins & Nucleic Acids

1. The basic unit of a protein is:

Amino acid Monosaccharide NH₃ Nucleotide

Correct answer: Amino acid

2. The major protein present in milk is:

Lactogen Myosin Casein Pepsin

Correct answer: Casein

3. Amino acids that are not synthesized in the body are called:

Non-essential amino acids Essential amino acids Deaminated amino acids Enzymatic amino acids

Correct answer: Essential amino acids

4. For body growth and repair, one needs:

Carbohydrates Fats Proteins Vitamins

Correct answer: Proteins

5. Histone is a basic protein mainly due to the presence of:

Alanine and glycine Methionine and serine Tryptophan and tyrosine Lysine and arginine

Correct answer: Lysine and arginine

6. Nucleic acids are made up of:

Amino acids Pentose sugars only Nucleosides Nucleotides

Correct answer: Nucleotides

7. The double-helix model of DNA was proposed by:

Watson and Crick Schleiden and Schwann Singer and Nicolson Kornberg and Khorana

Correct answer: Watson and Crick

8. The backbone of a DNA molecule is made up of:

Sugar and phosphate Hexose sugar and phosphate Purines and pyrimidines Nitrogen and phosphate

Correct answer: Sugar and phosphate

9. In DNA, the purine nitrogenous bases are:

Uracil and guanine Adenine and cytosine Guanine and adenine Cytosine and thymine

Correct answer: Guanine and adenine

10. The complementary bases of DNA are:

Adenine–Thymine and Guanine–Cytosine Adenine–Guanine and Thymine–Cytosine Uracil–Adenine and Cytosine–Guanine Adenine–Uracil and Guanine–Thymine

Correct answer: Adenine–Thymine and Guanine–Cytosine

Test 3 – Enzymes & Biomolecules

1. The fastest acting enzyme among the following is:

Lipase Amylase Peptidase Carbonic anhydrase

Correct answer: Carbonic anhydrase

2. Apoenzyme is:

Protein Vitamin Carbohydrate Amino acid

Correct answer: Protein

3. Which type of inhibitor inactivates an enzyme by changing its shape?

Competitive inhibitor Allosteric inhibitor Coenzyme Substrate

Correct answer: Allosteric inhibitor

4. The first discovered enzyme was:

Isomerase Transaminase Zymase Transferase

Correct answer: Zymase

5. Enzymes were discovered for the first time in:

Bacteria Yeast Algae Spinach

Correct answer: Yeast

6. NADP functions as:

An enzyme An ion carrier H acceptor coenzyme A part of tRNA

Correct answer: H acceptor coenzyme

7. Most enzymes consist of two parts. These are:

Enzyme and substrate Enzyme and coenzyme Apoenzyme and enzyme Apoenzyme and cofactor

Correct answer: Apoenzyme and cofactor

8. The first enzyme isolated in crystalline form was:

Catalase Urease