2nd Year Chemistry 4th Quarter Book Paper

Q1. Multiple choice questions (Attempt all · 12 × 1 = 12)

1. Which compound contributes to inflammation, pain, and fever?
   1. Prostaglandins
   2. Lipids
   3. Hormones
   4. Dopamine
2. Shorter retention times are associated with:
   1. Polar components with lower boiling points
   2. Non-polar components with high boiling points
   3. Metals
   4. Solvent molecules only
3. Fertilizers increase the natural fertility of the soil or:
   1. Replace lost water
   2. Add pesticides
   3. Increase soil acidity
   4. Replace elements
4. Which of the following is one of the strongest materials known?
   1. Silver
   2. Graphene
   3. Diamond
   4. Plastic
5. Cosmetics are mixtures of:
   1. Organic compounds only
   2. Only hydrocarbons
   3. Minerals only
   4. Natural and synthetic chemicals
6. Which enzyme functions optimally in the acidic environment of the stomach?
   1. Amylase
   2. Trypsin
   3. Pepsin
   4. Lipase
7. The stationary phase in chromatography functions mainly as:
   1. A solvent
   2. An adsorbent
   3. A lubricant
   4. A catalyst
8. Which genetically modified crop is resistant to papaya ringspot virus?
   1. Bt corn
   2. Rainbow papaya
   3. Golden rice
   4. Cotton
9. X-ray crystallography helps in identifying potential binding sites for:
   1. Metals
   2. New drugs
   3. Minerals
   4. Plastics
10. Why can long-term use of opiates lead to addiction?
    1. Because they inhibit serotonin reuptake
    2. ecause they cause irreversible binding to receptors
    3. ecause they increase dopamine release in the brain
    4. Because they decrease the production of natural endorphins
11. Reverse transcriptase inhibitors are used mainly against:
    1. Fungal infections
    2. HIV and retroviruses
    3. Bacterial pneumonia
    4. Malaria
12. In chromatography, the stationary phase may be ______ supported on a solid.
    1. Solid or liquid
    2. Liquid or gas
    3. Solid only
    4. Liquid only