Free Biological Molecules MCQs with Answers

• A. Saturated
• B. Unsaturated
• C. Oleic acid
• D. Palmitic acid

Explanation: Oleic acid is an example of a fat that has 18 carbon atoms with a single double bond, making it a monounsaturated compound.

• A. Sterol
• B. Cholesterol
• C. Lecithin
• D. Steroid

Explanation: Lecithin is the only naturally occurring phospholipid, the rest are fats, therefore option C is correct.

• A. Water
• B. Ether
• C. Inorganic solvents
• D. All solvents

Explanation: Ether is an organic solvent therefore it will be correct.

• A. Energy source
• B. Structure of membrane
• C. Insulation
• D. All of these

Explanation: Fats play essential and great role in plants and animal, therefore option D is correct.

• A. Ethanolamine
• B. Choline
• C. Serine
• D. Betaine

Explanation: Lecithin contains choline as its phosphate head, hence option B is correct.

• A. Sphingolipids
• B. Phospholipids
• C. Phosphodiester
• D. None of these

Explanation: Choline and serine are phosphate heads and hence they are a part of phospholipids as phospholipids contain polar phosphate heads, glycerol…

• A. Unsaturation in fat
• B. Average molecular weight of fatty acid
• C. Acetyl number
• D. Acid number

Explanation: Saponification number describes acid number.

• A. Lipotropism
• B. Blood clotting factors
• C. Used for energy production
• D. None of these

Explanation: Lipotropism is not a characteristic or property of essential fatty acids.

• A. 22% uracil
• B. 22% thymine
• C. 22% cytosine
• D. 22% guanine

Explanation: In RNA, Adenine forms 2 hydrogen bonds with Uracil and Cytosine bonds with Guanine.

• A. 3000
• B. 2000
• C. 6000
• D. 5000

Explanation: A amino acid is made of 3 nucleotides so 2000 multiply with 3, gives us 6000, hence option C is the correct answer.

• A. UTP
• B. FAD
• C. NAD
• D. ATP

Explanation: ATP is most abdundant as it is used for almost every reaction in the body.

• A. Lipids
• B. Waxes
• C. Glycerols
• D. Glycolipids

Explanation: Option B is correct because the cuticle is a waxy layer that reduces loss of excessive water during high temperatures in plants during…

• A. Riboflavin
• B. Vitamin C
• C. Niacin
• D. All of these

Explanation: Option D is correct because the vitamins mentioned in option A, B and C, they are polar and can form bonds with water, making it water…

• A. Guanine
• B. Thymine
• C. Cytosine
• D. Uracil

Explanation: Adenine forms 2 hydrogen bonds with Thymine, therefore option B is correct

• A. Vitamin C
• B. Vitamin B
• C. Both A and B
• D. None of the above

Explanation: Vitamin B is important for our body because it keeps our hair eyes and skin healthy while vitamin C boosts collagen synthesis and immune…

• A. A peptide bond is CO-NH
• B. Each polypeptide has one C terminal and the other N terminal
• C. The amino acid sequence of a protein determines the function of the protein
• D. The union of two amino acids produces two peptide linkages

Explanation: A peptide linkage is an amide linkage. It is represented by -CONH-. Thus, option A is correct.

• A. Covalent bonds
• B. Disulphide bridges
• C. Hydrogen bonds
• D. Phosphodiester bonds

Explanation: Human insulin is made up of 51 amino acids arranged in two polypeptide chains. one alpha and one beta chain.

• A. Glucose
• B. Palmitic acid
• C. Malic acid
• D. β-amino acid

Explanation: Palmitic acid is a saturated fatty acid that belongs to the long-chain fatty acids family.

• A. ATP
• B. DNA
• C. Chromosome
• D. Enzyme

Explanation: The energy currency of the cell is known as ATP, therefore option A is correct.

• A. Hemoglobin
• B. Plasma
• C. Creatinine
• D. Plasmids

Explanation: "The explanation for this question will be added soon!".