Explanation

A ratio is a comparison of two values, often expressed as a fraction or a decimal.

It shows the relative size or quantity of one value in relation to another.

For example: A ratio of 3:4 (or 3/4) compares two values, 3 and 4.

Explanation

• Transition elements, also known as transition metals, are a group of elements in the d-block of the periodic table.
• They are characterized by their ability to form ions with different charges.
• They are often found in the middle of the periodic table.

Explanation

The correct order is: Ribosomes → RER → Golgi body → Lysosome.

• Ribosomes: Protein synthesis occurs here, and the newly synthesized protein is released into the cytosol.
• RER (Rough Endoplasmic Reticulum): The protein is transported to the RER, where it is processed and modified (e.g., folding, glycosylation).
• Golgi body: The protein is packaged into vesicles and transported to the Golgi body, where it is further modified and sorted.
• Lysosome: The protein is delivered to lysosomes, where it can be used for various cellular processes (e.g., digestion, recycling).

Explanation

Activators are molecules that increase the activity of enzymes, often by binding to a specific site on the enzyme.

Inhibitors are molecules that decrease the activity of enzymes, often by binding to a specific site on the enzyme.

Explanation

The velocity of a satellite is independent of its mass.

According to Kepler's laws, velocity is determined by the orbit's semi-major axis and the central body's gravitational constant (G), not by the satellite's mass.

Explanation

Newton's law of universal gravitation states that every point mass attracts every other point mass by a force acting along the line intersecting both points.

This law applies to all objects in the universe, regardless of their size, shape, or composition.

Explanation

When a body is in unstable equilibrium, a slight tilt will cause its center of gravity (CG) to remain above the point of contact, making it prone to toppling over or falling.

This means that the CG is not directly over the point of support, but is still above it, creating a moment that tends to rotate the body further.

Key Points:

• A body is in stable equilibrium after slight tilt if its center of gravity remains above the point of contact.
• A body is in neutral equilibrium when its center of gravity remains at same height.

Explanation

This is a statement of Newton's second law of motion, which states that the force (F) required to accelerate an object is proportional to its mass (m).

Explanation

• When a saturated solution of KCl (potassium chloride) is heated, the solubility of KCl increases, allowing more KCl to dissolve in the solution.
• If the solution is heated to a temperature where all the KCl dissolves, it becomes a supersaturated solution.
• A supersaturated solution contains more dissolved solute than it can hold at a given temperature, making it unstable.

Explanation

• A triple covalent bond is a chemical bond that involves the sharing of three pairs of electrons between two atoms.
• This type of bond is typically found in molecules where three pairs of electrons are shared, resulting in a strong and stable bond.