1st Year Biology Chapter 2 Test02. Biological Molecules

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. Glucose and fructose are examples of:
   1. Optical isomers
   2. Structural isomers
   3. Functional group isomers
   4. Geometrical isomers
2. Proteins are classified into how many main types based on structure and shape?
   1. One
   2. Two
   3. Three
   4. Four
3. Each codon in mRNA consists of how many nucleotides?
   1. One
   2. Two
   3. Three
   4. Four
4. When two amino acids are linked to form peptide linkage______ is removed:
   1. Hydroxyl
   2. Water
   3. Carbon
   4. Nitrogen
5. The term nuclein was first used by:
   1. Watson
   2. Crick
   3. Swiss physician Miescher
   4. Franklin
6. How many amino acids are commonly found in proteins?
   1. 10
   2. 15
   3. 20
   4. 25
7. The number of stereoisomers of glucose can be calculated by:
   1. 2n
   2. n²
   3. n/2
   4. 2ⁿ⁺¹
8. Biochemistry is mainly concerned with the study of:
   1. Weather changes
   2. Composition and chemical processes in living organisms
   3. Growth of plants only
   4. Structure of the Earth
9. Lipoproteins are made of:
   1. Lipids and carbohydrates
   2. Protein and phospholipids
   3. Protein and nucleic acids
   4. Fats and sugars
10. A fatty acid is unsaturated if it:
    1. Contains hydrogen
    2. Contains double bonds
    3. Contains an acid group
    4. All of them