BGS, BSGS Bachelor of General Studies BSGS Natural Sciences 3

Question 1

During which phase of mitosis do chromosomes line up along the cell's equatorial plate?

Accepted Answer

Metaphase

Answer

During metaphase, condensed chromosomes are aligned at the metaphase plate by spindle fibers attached to kinetochores.

Question 2

What is the pH of a solution with a hydrogen ion concentration of 1 × 10⁻⁹ mol/L?

Accepted Answer

9

Answer

pH = –log[H⁺] = –log(10⁻⁹) = 9, which is basic (alkaline).

Question 3

Which type of rock is formed from the cooling and solidification of magma or lava?

Accepted Answer

Igneous

Answer

Igneous rocks form when molten material (magma underground or lava at the surface) cools and crystallizes.

Question 4

In physics, what does Newton's second law of motion state?

Accepted Answer

Force equals mass times acceleration

Answer

Newton's second law (F = ma) states that the net force on an object equals its mass multiplied by its acceleration.

Question 5

Which process converts atmospheric nitrogen gas (N₂) into ammonia (NH₃) usable by plants?

Accepted Answer

Nitrogen fixation

Answer

Nitrogen fixation, carried out by bacteria such as Rhizobium, breaks the triple bond in N₂ and converts it to ammonia.

BGS, BSGS Bachelor of General Studies Practice Test