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 10 of 15
- A. sodium carbonate, sodium citrate, and copper(II) sulfate pentahydrate.
- B. Cu(OH)2 NaOH+ Tartaric acid (C4H6O7)
- C. Ag(NH1)2OH + NaOH + H2SO4
- D. NaCl+NaOH+Citric acid (C4H6O7)
Explanation: A chemical solution that changes color in the presence of glucose and other reducing sugars is used in clinical urine tests for diabetes.
Correct answer: sodium carbonate, sodium citrate, and copper(II) sulfate pentahydrate.- A. Secondary structure
- B. Tertiary structure
- C. Primary structure
- D. Quaternary structure
Explanation: The most common types of secondary structures are the α helix and the β pleated sheet.2.
Correct answer: Primary structure- A. Hormonal protein
- B. Structural protein
- C. Transport protein
- D. Genetic protein
Explanation: Thyroxine, also known as T4, is a hormone produced by the thyroid gland.
Correct answer: Hormonal protein- A. Throbmin
- B. L-asparaginase
- C. LDH-1
- D. Zymase
Explanation: L-asparaginase is an enzyme used in the treatment of blood cancer (leukemia) in children.
Correct answer: L-asparaginase- A. Double salt
- B. Internal salt
- C. Basic salt
- D. Acidic salt
Explanation: A zwitter ion is an ion that contains two functional groups. In simple terms, it is an ion possessing both positive and negative…
Correct answer: Internal salt- A. Peptide linkage
- B. Glycoside linkage
- C. Ester linkage
- D. Ether linkage
Explanation: Peptide linkage refers to the covalent bond formed between amino acids in a protein, creating a polypeptide chain.
Correct answer: Peptide linkage- A. Hydrolysis
- B. Addition
- C. Oxidation
- D. Inversion
Explanation: When sugars are exposed to alkaline conditions, especially when heated, reducing sugars can be oxidized.
Correct answer: Oxidation- A. Haemoglobin, Ferritin
- B. Myoglobin, Ferrous
- C. Haemoglobin, Ferrous
- D. Both (a) and (c)
Explanation: -Respiratory pigment Haemoglobin has a quaternary structure where each polypeptide has a heme group with iron in the center.
Correct answer: Haemoglobin, Ferritin- A. Primary and alpha helix structure respectively
- B. Primary and Beta-pleated sheet structures respectively
- C. Secondary and alpha helix structure respectively
- D. None of these
Explanation: Peptide bonds are found in the primary structure, and hydrogen bonds stabilize the secondary structure, including both alpha helices and…
Correct answer: None of these- A. Fermentation
- B. Inversion
- C. Esterification
- D. Rearrangement
Explanation: Fermentation is a metabolic process that converts sugar to acids, gases, or alcohol.In this case, sucrose is broken down into glucose and…
Correct answer: Fermentation- A. 8.0
- B. 6.0
- C. 5.4
- D. 7.4
Explanation: An average adult human body has approximately 4.7 to 5.5 liter blood of pH 7.35, therefore our blood is slightly alkaline.It is a common…
Correct answer: 7.4- A. Serum protein presents in blood acts as buffer
- B. Na-K channels maintains flow of hydrogen ions
- C. Hb acts as a buffer and also helps in its coagulation
- D. It is neutral
Explanation: Human blood is slightly alkaline with a pH of 7.4. The pH of blood is maintained within a narrow range, and it does not change…
Correct answer: Serum protein presents in blood acts as buffer193. CO-Hb bond is:
- A. More stable than O2-Hb bond.
- B. Less stable than O2-Hb bond
- C. Stability of both bonds are approximately same
- D. CO-Hb does not exist
Explanation: The CO-Hb bond is more stable than the O2-Hb bond because of the following reasons: CO has a higher affinity for hemoglobin than O2 does.
Correct answer: More stable than O2-Hb bond.- A. (I) − (C) ; (II) − (D) ; (III) − (B); (IV) − (A)
- B. (I) − (A) ; (II) − (B) ; (III) − (C); (IV) − (D)
- C. (I) − (D) ; (II) − (C) ; (III) − (B); (IV) − (A)
- D. (I) − (C) ; (II) − (D) ; (III) − (A); (IV) − (B)
Explanation: -Scurvy is a disease caused by a deficiency of vitamin C or ascorbic acid in the body.
Correct answer: (I) − (C) ; (II) − (D) ; (III) − (B); (IV) − (A)- A. Rickets
- B. Chicken pox
- C. Malaria
- D. Small pox
Explanation: Any person can get malaria when a Anopheles mosquito infected with Plasmodium parasite bites you and transfers it to you.
Correct answer: Malaria- A. Vitamin E
- B. Vitamin B1
- C. Vitamin K
- D. Vitamin B12
Explanation: Vitamin B is a water-soluble vitamin, they contain nitrogen in their ring in all eight different forms i.e., B1, B2, B3, B5, B6, B7, B9…
Correct answer: Vitamin B1- A. C2nHnO2n
- B. Cn(H2O)2n
- C. Cn(H2O)n
- D. CnH3nO2n
Explanation: General formula for carbohydrates are Cn(H2O)n or CnH2nOn, e.g. glucose C6H12O6.
Correct answer: Cn(H2O)n- A. Glucose has one −CHO group
- B. Glucose has five −OH groups and one primary alcohol group.
- C. Glucose gives a postive Fehling's solution test
- D. Glucose has five secondary alcohol groups
Explanation: Glucose is a simple sugar with the molecular formula C6H12O6. It has one −CHO group, five −OH groups and one primary alcohol group.
Correct answer: Glucose has five secondary alcohol groups- A. One mole of glucose and 2 moles of fructose
- B. One mole of glucose and one mole of fructose
- C. Two moles of glucose
- D. Two moles of fructose
Explanation: When one mole of sucrose (having molecular formula C12H22O11) undergoes hydrolysis, it gets converted into one mole of glucose and one…
Correct answer: One mole of glucose and one mole of fructose- A. Its optical rotation sign changes from dextrorotatory (d) to laevorotatory (l)
- B. Its optical rotation sign changes from laevorotatory (l) to dextrorotatory (d)
- C. Optical rotation sign remains unchanged
- D. None of given options are correct
Explanation: The hydrolysis of sucrose is called an Inversion reaction because it results in a change in the sign of rotation of plane-polarized light…
Correct answer: Its optical rotation sign changes from dextrorotatory (d) to laevorotatory (l)