Free Classification of Biological Molecules MCQs with Answers
154 Classification of Biological Molecules MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Biological molecules are classified as carbohydrates, lipids, proteins and nucleic acids, with water, minerals and vitamins also supporting cellular processes. The key distinctions involve their monomers, chemical bonds, structures and functions, including glucose and starch, fatty acids and triglycerides, amino acids and polypeptides, and nucleotides in DNA and RNA.
Last updated
154 questions · page 8 of 8
- A. Structure of cells
- B. Enzymatic function
- C. Metabolic function
- D. Both A and B
Explanation: Option D is correct since it includes both A and B which are right. The insoluble nature of large organic molecules means that it is…
Correct answer: Both A and B- A. Combining of molecules due to reaction with hydrogen
- B. Combining of molecules due to reaction with water
- C. Breaking of molecules due to reaction with water
- D. Breaking of molecules due to reaction with hydrogen
Explanation: The 'lysis' in hydrolysis means splitting. It is the splitting of molecule using water.
Correct answer: Breaking of molecules due to reaction with water- A. Carbon dioxide
- B. Water
- C. Lipid
- D. Hydrochloric acid
Explanation: Fats, nucleic acids, carbohydrates, enzymes, proteins, and hydrocarbon fuels are examples of organic molecules.
Correct answer: Lipid- A. Electronegative oxygen
- B. Nitrogen atom
- C. Sulphur
- D. Both A and B
Explanation: Most contain nitrogen, and some also contain sulfur or cobalt or oxygen except carbon, hydrogen elements.
Correct answer: Both A and B- A. Vitamin C
- B. Vitamin B
- C. Both options A and B are correct
- D. None of these options is correct
Explanation: Vitamin B1 (thiamine) and vitamin B2 (riboflavin) are generally non-toxic.
Correct answer: Both options A and B are correct- A. Carbohydrates
- B. Proteins
- C. Lipids
- D. All of these
Explanation: Large organic molecules are composed of many atoms, and they are often referred to as macromolecules.
Correct answer: All of these- A. UTP
- B. FAD
- C. NAD
- D. ATP
Explanation: The most abundant free nucleotide in mammalian cells is ATP.
Correct answer: ATP148. Carbon can form bonds with which of the following to perform various functions in living organisms?
- A. H
- B. N and O
- C. S
- D. All of the above options are correct
Explanation: Carbon can bind to H, O, N, and S and form many important structural and functional components of a living organism.
Correct answer: All of the above options are correct- A. Nucleotide
- B. Nucleoside
- C. Nucleic Acid
- D. Polynucleotide
Explanation: Nucleosides are the structural subunit of nucleic acids such as DNA and RNA.
Correct answer: Nucleoside- A. Nucleic acids
- B. Nucleus
- C. Carbohydrates
- D. Proteins
Explanation: DNA and RNA are the chain of polynucleotides, that are joined by ester linkage known as 'phosphodiester bonds'.
Correct answer: Nucleic acids- A. Photolysis
- B. Condensation
- C. Deduction
- D. Convection
Explanation: Condensation is a chemical reaction where two molecules combine to form a larger molecule, typically accompanied by the release of water.
Correct answer: Condensation- A. AMP
- B. ATP
- C. ADP
- D. FAD
Explanation: A nucleotide is an organic molecule that is composed of a nitrogenous base, a five-carbon sugar, and a phosphate group.
Correct answer: FAD- A. Trivirates
- B. Triumvirates
- C. Trisvirates
- D. All of the above
Explanation: The correct answer is 'Triumvirates.' This term is used to describe a powerful group of three, which in this context applies to the three…
Correct answer: Triumvirates- A. Decarboxylation
- B. Hydration
- C. Dehydration
- D. Hydrolysis
Explanation: Condensation reactions involve the combination of two molecules to form a new molecule, often with the loss of a small molecule like water…
Correct answer: Hydrolysis