Practice Quiz 1

Which statement refers to a scientific inference?

• Malaria is caused by a protist. 

• Chloroplasts in plant cells are green.

• The structure of DNA is a double helix.

• Black bears are looking for food while walking along a stream.

Fats, oils and cholesterol as shown on the food nutrition label below are all types of what kind of macromolecule?

• 
  lipids

• hormones

• 
  fatty acids

• cell membranes

What is the correct name and function of the macromolecule above?

• Protein: Formation of enzymes

• Nucleic Acid: Storage of energy

• Protein: Water-soluble membranes

• Nucleic Acid: Contains genetic information

Tags

NGSS.HS-LS1-1

Which of the following best describes a result of the polar nature of water molecules?

• Water molecules repel each other

• Ionic compounds can dissolve easily in water

• Other substance are repelled by water molecules

• Volume of water decreases by nearly half when it is frozen

Tags

NGSS.HS-ESS2-5

A scientist is analyzing a compound in the laboratory. The scientist finds that it is made up of a ratio of 1 carbon atom, 2 hydrogen atoms, and 1 oxygen atom. How will the scientist classify the compound?

• Lipid

• Protein

• Nucleic Acid

• Carbohydrate

Large bodies of water, such as lakes and oceans, do not quickly fluctuate in temperature. What is the reason for this phenomenon?

• Water is an acid.

• 
  Water acts as a buffer.

• 
  Water is a versatile solvent.

• Water has a high heat capacity.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Refer to the figure above. How do enzymes speed up chemical reactions involved in the digestion of food?

• Enzymes reduce the amount of energy required for the reactions to occur.

• Enzymes increase the concentration of the reactants involved in the reactions.

• Enzymes reduce the number of atoms needed in the products of the reactions.

• Enzymes provide heat energy that speeds up the molecules involved in the reactions.

Tags

NGSS.HS-PS1-2

Water makes up approximately 60% of the human body and plays a vital role in regulating body temperature. Which property of water makes it good at regulating temperature?

• Water molecules repel one another

• Many substances needed for life dissolve in water

• Water has many kinds of molecular arrangements

• Water is able to absorb lots of energy before changing temperature

Which of the following best compares the structures of lipids and carbohydrates?

• Both consist of carbon, hydrogen, and oxygen, but carbohydrates have a ratio of 1:2:1 and lipids do not.

• Both contain carbon and hydrogen, but carbohydrates do not contain oxygen and lipids contain nitrogen.

• Both are made up of monosaccharide monomers, but lipids are hyrdophobic and carbohydrates are hydrophillic.

• Both have a carbon backbone, but lipids also have an amino group and carbohydrates have a carboxylic acid group.

Which of the following best compares the function of nucleic acids and proteins in cells?

• Nucleic acids store and release energy while proteins regulate processes. 

• Nucleic acids store and transmit genetic information while proteins regulate processes. 

• Nucleic acids store and transmit genetic information while proteins store and release energy. 

• Nucleic acids store and transmit genetic information while proteins form membranes and waterproof coverings.