Free Macromolecules MCQs with Answers
299 Macromolecules MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Proteins are classified by shape, composition and structure, from primary amino acid sequence to secondary, tertiary and quaternary organisation, and their biological roles are linked to this structure. Enzymes are examined as protein biocatalysts, including active sites, substrate specificity, activation energy, cofactors and factors affecting activity.
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Read the Macromolecules notesFree MDCAT chapter notes with key terms299 questions · page 4 of 15
- A. Lactic dehydrogenase
- B. Alkaline phosphatase
- C. L-asparaginase
- D. Cellulase
Explanation: L-asparaginase is useful in treating some leukemias because it hydrolyses circulating asparagine, depriving certain cancer cells of an…
Correct answer: L-asparaginase- A. Oxidoreductases
- B. Hydrolases
- C. Isoenzymes
- D. Isomerases
Explanation: Isoenzymes are different molecular forms of an enzyme found in the same organism that catalyse the same reaction but differ in physical…
Correct answer: Isoenzymes- A. Lyases
- B. Ligases
- C. Lipases
- D. Hydrolases
Explanation: Lipases are enzymes that hydrolyse triglycerides into glycerol and fatty acids.
Correct answer: Lipases- A. lysine
- B. alanine
- C. tyrosine
- D. proline
Explanation: Tyrosine is characteristically found among the amino acids present in cheese and may form crystals in aged cheese.
Correct answer: tyrosine- A. Glucose
- B. Triglycerides
- C. Proteins
- D. All
Explanation: DNA stores genetic instructions and nucleic acids direct transcription and translation, the processes that produce specific polypeptide…
Correct answer: Proteins- A. Enzymes
- B. Nitrogenous bases
- C. Carbohydrates
- D. Lipids
Explanation: Purines, adenine and guanine, and pyrimidines, cytosine, thymine and uracil, are nitrogen-containing bases found in nucleic acids.
Correct answer: Nitrogenous bases- A. Orgocalciferol
- B. Vitamin D2
- C. Sterol
- D. all of the above
Explanation: Ergosterol is a sterol, meaning it is a steroid alcohol with a hydroxyl group, found chiefly in fungal cell membranes.
Correct answer: Sterol- A. Derived lipids
- B. Simple lipids
- C. Compound lipids
- D. Not a type of lipids
Explanation: Lipopolysaccharides contain a lipid portion covalently linked to a carbohydrate, or polysaccharide, portion.
Correct answer: Compound lipids- A. Skeleton tissues
- B. Cardiac tissues
- C. Connective tissues
- D. Adipose tissues
Explanation: Animal fat is stored mainly in adipose tissue, whose cells are specialized for storing triglycerides in large fat droplets.
Correct answer: Adipose tissues- A. Acidic
- B. Neutral
- C. Amphoteric
- D. Basic
Explanation: Amino acids with a greater number of NH2 groups (amine groups) are more basic because the amine groups can accept protons (H+ ions) and…
Correct answer: Basic- A. Acidic
- B. Neutral
- C. Basic
- D. Acidic and Basic
Explanation: Histidine is an amino acid that can act as both an acid and a base due to the presence of an imidazole side chain.
Correct answer: Acidic and Basic- A. i and A, ii and B, iii and C, iv and D
- B. i and B, ii and A, iii and D, iv and C
- C. i and D, ii and C, iii and B, iv and A
- D. i and C, ii and D, iii and A, iv and B
Explanation: The amino acids can be classified based on the nature of their side chains. I.
Correct answer: i and D, ii and C, iii and B, iv and A- A. Carbohydrates
- B. Proteins
- C. Lipids
- D. Fats
Explanation: Proteins are large, complex molecules composed of amino acids. They play a crucial role in almost all biological processes, serving as…
Correct answer: Proteins- A. Covalent
- B. Ionic
- C. Hydrogen
- D. All of these options are correct
Explanation: It is correct as all three bonds: covalent, ionic, and hydrogen bonding exist in proteins.
Correct answer: All of these options are correct- A. Uracil
- B. Thymine
- C. Ribose
- D. Phosphate
Explanation: RNA (ribonucleic acid) is a nucleic acid that consists of a chain of nucleotides.
Correct answer: Thymine- A. Chrome oxidase
- B. Carbonic anhydrase
- C. Glucose 6-phosphatase
- D. Both a and b
Explanation: Chrome oxidase, also known as cytochrome e oxidase, is an enzyme found in the mitochondrial membrane, It is the last enzyme in the…
Correct answer: Chrome oxidase- A. (C_6H_12O_6)n
- B. C_5H_10O_5
- C. C_6H_12O_6
- D. C_5H_10O_6
Explanation: Fructose is a monosaccharide, a simple sugar with the molecular formula C_6H_12O_6.
Correct answer: C_6H_12O_6- A. Sucrose
- B. Lactose
- C. Raffinose
- D. Dextrin
Explanation: Disaccharides are carbohydrates composed of two monosaccharide units joined together by a glycosidic bond.Sucrose, lactose, and raffinose…
Correct answer: Dextrin- A. Potato
- B. Milk
- C. Egg
- D. Fruit
Explanation: Fruits are generally low in protein compared to other food sources like potatoes, milk, and eggs.
Correct answer: Fruit- A. Chrome oxidase
- B. Carbonic anhydrase
- C. Glucose 6-phosphatase
- D. Both a and b
Explanation: Chrome oxidase is indeed an enzyme that utilizes iron as a cofactor. It's involved in the electron transport chain, specifically in the…
Correct answer: Chrome oxidase