AP Biology Quiz

About 25 of the 92 natural elements are known to be essential to life. Which four of these 25 elements make up approximately 96% of living matter?

• carbon, sodium, chlorine, nitrogen

• oxygen, hydrogen, calcium, sodium

• carbon, hydrogen, nitrogen, oxygen

• carbon, oxygen, sulfur, calcium

Each element is unique and different from other elements because of the number of protons in the nuclei of its atoms. Which of the following indicates the number of protons in an atom's nucleus?

• atomic mass

• atomic weight

• atomic number

• mass number

Oxygen has an atomic number of 8 and a mass number of 16. Thus, the atomic mass of an oxygen atom is

• exactly 8 grams

• exactly 8 daltons

• approximately 16 grams

• 16 daltons

Which statement is true?

• An atom's atomic mass is the sum of its protons and neutrons.

• An atom's atomic mass is the sum of its protons, neutrons, and electrons.

• All atoms of an element have the same number of subatomic particles.

• Ions of an element have significantly different masses than neutral atoms of an element.

The book talked about a molecule that has polar covalent bonds. What molecule was it talking about?

• Water

• Hydrongen Gas - H₂

• Oxygen Gas - O₂

• Sodium Chloride NaCl

Tags

NGSS.HS-ESS2-5

Which electrons determine the behavior of an atom?

• Valence electrons

• The ones in the inner-most energy level.

• Positive electrons

• Pfluberonic electrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

When Magnesium bonds with Oxygen, what charge does Magnesium end up with?

• +2

• -2

• It doesn't pick up a charge, it's a covalent bond.

• -1

Tags

NGSS.HS-PS1-2

Which of the following organelles is involved in the synthesis of proteins?

• Lysosome

• Mitochondrion

• Ribosome

• Golgi apparatus

The fluid mosaic model describes the structure of the:

• Cell wall

• Cytoplasm

• Plasma membrane

• Nucleus

Which of the following processes involves the movement of water across a semi-permeable membrane?

• Diffusion

• Active transport

• Osmosis

• Endocytosis