1 :

Hint : totipotent cells

Correct Answers:

  • Develops into any kind of cell.

Rationale :
Totipotent cells are the most versatile cells in an organism because they have the ability to differentiate into any type of cell in the body, including both embryonic and extra-embryonic tissues.
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2 :

Hint : dispersal of small particles throughout a medium &colloidal solution

Correct Answers:

  • Particulate matter is dispersed in a solution.

Rationale :
A colloidal solution consists of tiny particles (particulate matter) that are dispersed throughout a continuous medium.
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3 :

Hint : Myelin sheath insulates axons to speed up nerve impulses.

Correct Answers:

  • Insulation.

Rationale :
The myelin sheath acts as an insulating layer around the axons of nerve cells, allowing electrical impulses to travel more quickly and efficiently along the nerve.
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4 :

Hint : changes in states of matter

Correct Answers:

  • Particles become less ordered.

Rationale :
As a solid turns into a liquid (melting), the particles gain energy, leading to a decrease in their orderly arrangement.
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5 :

Hint : density = mass/volume.

Correct Answers:

  • Graduated cylinder, water, weighing balance

Rationale :
A weighing balance measures the mass, while water displacement in a graduated cylinder determines the volume of irregular solids.
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6 :

Hint : Enzymes are proteins that catalyze reactions

Correct Answers:

  • Proteins

Rationale :
Enzymes are biological catalysts made up of proteins. They speed up biochemical reactions by lowering the activation energy without being consumed in the process.
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7 :

Hint : Catalysts lower activation energy to speed up reactions; they don’t change yield

Correct Answers:

  • The reaction is completed in a shorter amount of time.

Rationale :
A catalyst speeds up a chemical reaction by lowering the activation energy required for the reaction to occur, allowing it to proceed more quickly without affecting the reaction's yield or energy release.
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8 :

Hint : Antibiotics treat bacterial infections, not viral infections like colds.

Correct Answers:

  • Virus

Rationale :
Antibiotics are effective against bacteria but not against viruses. Colds and sore throats are often caused by viruses, which do not respond to antibiotic treatment.
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9 :

Hint : The crural region refers to the lower leg

Correct Answers:

  • Crural

Rationale :
The tibia and fibula are the two long bones located in the lower leg, which corresponds to the crural region.
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10 :

Hint : repolarization occurs when potassium exits the neuron, restoring the resting membrane potential

Correct Answers:

  • The opening of potassium channels, allowing potassium to leave the neuron

Rationale :
During repolarization, potassium channels open, allowing potassium ions to exit the neuron.
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Total Questions: 10

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