AFOQT AFOQT General Science Biology and Chemistry 2

Question 1

DNA is stored primarily in which part of the eukaryotic cell?

Accepted Answer

Nucleus

Answer

The nucleus houses the cell's genetic material as chromosomes and serves as the cell's control center.

Question 2

An exothermic chemical reaction is one that:

Accepted Answer

Releases heat to surroundings

Answer

Exothermic reactions release energy as heat to the surrounding environment, causing the surroundings to warm.

Question 3

Osmosis is best defined as the movement of:

Accepted Answer

Water across a semipermeable membrane toward higher solute concentration

Answer

Osmosis is the passive diffusion of water through a semipermeable membrane from an area of lower to higher solute concentration.

Question 4

The atomic number of an element represents:

Accepted Answer

The number of protons in the nucleus

Answer

The atomic number equals the number of protons in an atom's nucleus and uniquely identifies each element.

Question 5

Which type of organism breaks down dead organic matter and recycles nutrients back into the ecosystem?

Accepted Answer

Decomposers

Answer

Decomposers such as fungi and bacteria break down dead organic material, returning essential nutrients to the soil.

AFOQT Practice Test