NEET MCQ Test 5 — Questions and Answers
Question 1: Which type of bond involves the sharing of electrons between atoms?
- Ionic bond
- Covalent bond (Correct answer)
- Hydrogen bond
- Metallic bond
Correct answer: Covalent bond
Covalent bonds form when atoms share one or more pairs of electrons to achieve stable electron configurations.
Question 2: The process of converting glucose to pyruvate in the absence of oxygen is called:
- Krebs cycle
- Oxidative phosphorylation
- Glycolysis (Correct answer)
- Beta oxidation
Correct answer: Glycolysis
Glycolysis is the anaerobic breakdown of glucose into two pyruvate molecules, producing 2 ATP net gain.
Question 3: A convex lens forms a real, inverted, and diminished image when the object is placed:
- At the focus
- Between focus and optical center
- Between focus and 2F
- Beyond 2F (Correct answer)
Correct answer: Beyond 2F
When an object is placed beyond 2F of a convex lens, the image formed is real, inverted, and diminished.
Question 4: Which element has the highest electronegativity on the Pauling scale?
- Oxygen
- Chlorine
- Nitrogen
- Fluorine (Correct answer)
Correct answer: Fluorine
Fluorine has the highest electronegativity value of 3.98 on the Pauling scale due to its small size and high nuclear charge.
Question 5: The 'Fight or Flight' response is triggered by which hormone?
- Thyroxine
- Insulin
- Adrenaline (Epinephrine) (Correct answer)
- Estrogen
Correct answer: Adrenaline (Epinephrine)
Adrenaline (epinephrine), secreted by the adrenal medulla, prepares the body for the 'fight or flight' stress response.
Question 6: Which law of thermodynamics states that energy cannot be created or destroyed?
- Zeroth Law
- First Law (Correct answer)
- Second Law
- Third Law
Correct answer: First Law
The First Law of Thermodynamics (conservation of energy) states total energy of an isolated system remains constant.
Question 7: The Hardy-Weinberg equilibrium principle applies to populations that are:
- Small and isolated
- Experiencing natural selection
- Large with random mating and no evolution (Correct answer)
- Rapidly evolving
Correct answer: Large with random mating and no evolution
Hardy-Weinberg equilibrium requires large population size, random mating, no mutation, no selection, and no gene flow.
NEET MCQ Test 5
Which type of bond involves the sharing of electrons between atoms?