GIKI Entry Test Chemistry: Macromolecules MCQs

GIKI Entry Test Chemistry: Macromolecules MCQs — sample questions

1. Question 1

   Q1. What is the primary structure of a protein?

   • A) Sequence of amino acids
   • B) Alpha helix
   • C) Beta sheet
   • D) Tertiary structure

   Answer: Sequence of amino acids

   Explanation: Primary structure is the sequence of amino acids in a protein, determined by peptide bonds between amino acids.

2. Question 2

   Q2. Which type of bond is responsible for the formation of a peptide bond?

   • A) Ionic bond
   • B) Covalent bond
   • C) Hydrogen bond
   • D) Van der Waals bond

   Answer: Covalent bond

   Explanation: Peptide bond is a covalent bond formed between the carboxyl group of one amino acid and the amino group of another.

3. Question 3

   Q3. What is the molecular formula for glucose?

   • A) C5H10O5
   • B) C6H12O6
   • C) C6H10O5
   • D) C5H12O6

   Answer: C6H12O6

   Explanation: Glucose is a simple sugar with the molecular formula C6H12O6, indicating 6 carbon, 12 hydrogen, and 6 oxygen atoms.

4. Question 4

   Q4. Which polysaccharide is composed of glucose units joined by α-1,4-glycosidic bonds?

   • A) Cellulose
   • B) Starch
   • C) Glycogen
   • D) Chitin

   Answer: Starch

   Explanation: Starch is a polysaccharide composed of glucose units joined by α-1,4-glycosidic bonds, serving as energy storage in plants.

5. Question 5

   Q5. What type of nucleic acid is responsible for carrying genetic information from DNA to the ribosome?

   • A) mRNA
   • B) tRNA
   • C) rRNA
   • D) snRNA

   Answer: mRNA

   Explanation: mRNA (messenger RNA) carries genetic information from DNA to the ribosome for protein synthesis.