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

Cytoplasm

Answer

Mitochondria

Answer

Cell membrane

Question 2

An exothermic chemical reaction is one that:

Accepted Answer

Releases heat to surroundings

Answer

Absorbs heat from surroundings

Answer

Requires a light catalyst

Answer

Produces only water as a product

Question 3

Osmosis is best defined as the movement of:

Accepted Answer

Water across a semipermeable membrane toward higher solute concentration

Answer

Solutes from high to low concentration

Answer

Oxygen across cell membranes

Answer

Proteins through active transport channels

Question 4

The atomic number of an element represents:

Accepted Answer

The number of protons in the nucleus

Answer

The number of neutrons in the nucleus

Answer

The atomic mass of one atom

Answer

The number of valence electrons

Question 5

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

Accepted Answer

Decomposers

Answer

Producers

Answer

Primary consumers

Answer

Apex predators

Question 6

In ionic bonding, a chemical bond forms when:

Accepted Answer

One atom transfers electrons to another atom

Answer

Two atoms share electrons equally

Answer

Atoms share electrons unequally

Answer

Two nonmetals repel each other