NEET MCQ Test 4 — Questions and Answers
Question 1: Which hormone regulates blood glucose levels by promoting its uptake into cells?
- Glucagon
- Insulin (Correct answer)
- Adrenaline
- Cortisol
Correct answer: Insulin
Insulin, secreted by beta cells of the pancreas, lowers blood glucose by facilitating cellular glucose uptake.
Question 2: The hybridization of carbon in methane (CH4) is:
- sp
- sp2
- sp3 (Correct answer)
- sp3d
Correct answer: sp3
In methane, carbon forms four equivalent sigma bonds using sp3 hybrid orbitals in a tetrahedral arrangement.
Question 3: Which principle states that it is impossible to simultaneously determine the exact position and momentum of a particle?
- Pauli Exclusion Principle
- Aufbau Principle
- Heisenberg Uncertainty Principle (Correct answer)
- Hund's Rule
Correct answer: Heisenberg Uncertainty Principle
Heisenberg's Uncertainty Principle states that Δx·Δp ≥ h/4π, making simultaneous precise measurements impossible.
Question 4: Meiosis results in daughter cells with:
- Same number of chromosomes as parent
- Double the chromosomes of parent
- Half the chromosomes of parent (Correct answer)
- Identical DNA to parent
Correct answer: Half the chromosomes of parent
Meiosis undergoes two division cycles producing four haploid (n) cells from one diploid (2n) parent cell.
Question 5: The speed of light in vacuum is approximately:
- 3 × 10^6 m/s
- 3 × 10^8 m/s (Correct answer)
- 3 × 10^10 m/s
- 3 × 10^12 m/s
Correct answer: 3 × 10^8 m/s
The speed of light in vacuum is approximately 3 × 10^8 m/s (299,792,458 m/s exactly).
Question 6: Which part of the nephron is responsible for filtration of blood?
- Loop of Henle
- Collecting duct
- Glomerulus (Correct answer)
- Proximal convoluted tubule
Correct answer: Glomerulus
The glomerulus, a capillary network in Bowman's capsule, filters blood under high pressure to form filtrate.
Question 7: IUPAC name of CH3-CH2-OH is:
- Methanol
- Ethanol (Correct answer)
- Propanol
- Butanol
Correct answer: Ethanol
CH3-CH2-OH contains two carbon atoms with a hydroxyl group, making it ethanol by IUPAC nomenclature.
NEET MCQ Test 4
Which hormone regulates blood glucose levels by promoting its uptake into cells?