2nd Year Chemistry Chapter 11 TestBIOCHEMISTRY

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

1. Penicillin kills bacterial strains by targeting the enzyme:

   1. Carbonic anhydrase

   2. Succinate dehydrogenase

   3. Trans-peptidase

   4. Amylase

2. Phosphodiester linkage joins which carbon atoms of adjacent sugars?

   1. 1' and 2'

   2. 2' and 3'

   3. 3' and 4'

   4. 5' and 3'

3. Which of the following is classified as a macro-mineral?

   1. Iron

   2. Zinc

   3. Iodine

   4. Magnesium

4. The covalent bond that links two amino acid units together is called a:

   1. Glycosidic linkage

   2. Peptide bond

   3. Ester bond

   4. Phosphodiester bond

5. A monosaccharide containing five carbon atoms is structurally classified as a:

   1. Triose

   2. Tetrose

   3. Pentose

   4. Hexose

6. Which of the following is NOT an example of a polysaccharide?

   1. Cellulose

   2. Glycogen

   3. Starch

   4. Lactose

7. In ß-pleated sheets, hydrogen bonds form between:

   1. R-groups of distant lipid chains

   2. Adjacent polypeptide strands or segments

   3. Metal ions and sulfur atoms

   4. Water molecules and glucose rings

8. One molecule of carbonic anhydrase can process how many reactant molecules per second?

   1. 1,000

   2. 10,000

   3. 100,000

   4. 1,000,000

9. Which one of the following nitrogenous bases is unique to RNA?

   1. Cytosine

   2. Adenine

   3. Thymine

   4. Uracil

10. The specific linear order of amino acids in a polypeptide chain defines its:

    1. Primary structure

    2. Secondary structure

    3. Tertiary structure

    4. Quaternary structure