Chemistry in Biology Test

Fill in the blanks using the available answer choices. The branch of science that studies carbon and its compounds is called __________.

• organic chemistry

• inorganic chemistry

• physical chemistry

• analytical chemistry

Infer why hydrogen peroxide (H₂O₂) is toxic to drink even though it is composed of the same elements as water.

• It has a different molecular structure.

• It is more acidic than water.

• It contains impurities.

• It is a solid at room temperature.

Tags

NGSS.HS-PS1-3

Which is true in a covalent bond?

• The bond is caused by van der Waals forces.

• The bond forms when electrons are shared.

• The bond forms when electrons are donated.

• The bond forms between ions.

Which macromolecule stores genetic information for an organism?

• carbohydrate

• lipid

• nucleic acid

• protein

Tags

NGSS.HS-LS3-1

What information can a chemist gain about the element gold by looking at the periodic table?

• Atomic number and mass

• Chemical symbol and state of matter

• Electron configuration and reactivity

• All of the above

Tags

NGSS.HS-PS1-1

Elements are placed into the same group on the periodic table of the elements because they __.

• have the same number of electron energy levels

• have similar chemical properties

• form the same isotopes

• have the same number of protons

Tags

NGSS.HS-PS1-1

Which macromolecule is involved in nearly every function in the human body?

• lipid

• protein

• carbohydrate

• nucleic acid

Tags

NGSS.HS-LS1-1

Why is it important that enzymes can only bind to specific substrates?

• To prevent the enzyme from being used up

• To ensure the enzyme can bind to any molecule

• To allow the enzyme to catalyze multiple reactions simultaneously

• To ensure the enzyme catalyzes the correct reaction

Contrast the following mixtures: blood, salt water, and a soil-water mixture.

• Blood is a homogeneous mixture, salt water is a heterogeneous mixture, and soil-water is a solution.

• Blood is a heterogeneous mixture, salt water is a solution, and soil-water is a suspension.

• Blood is a solution, salt water is a suspension, and soil-water is a homogeneous mixture.

• Blood is a suspension, salt water is a homogeneous mixture, and soil-water is a solution.

Ammonia is a compound that forms hydroxide ions when it is dissolved in water; it is a ________________.

• base

• acid

• salt

• metal