BIOLOGY: Which is the true statement about the structure of DNA?

• Double-stranded with nitrogen bases: guanine, cytosine, thymine, and uracil

• Double-stranded with nitrogen bases: guanine, cytosine, thymine, and adenine

• Single-stranded with nitrogen bases: guanine, cytosine, adenine, and uracil

• Single-stranded with nitrogen bases: guanine, cytosine, thymine, and adenine

BIOLOGY: What is the basic unit of life?

• organism

• atom

• molecule

• cell

BIOLOGY: What is the role of ribosomes in a cell?

• Energy production

• Waste elimination

• Cell division

• Protein synthesis

BIOLOGY: Which correctly matches the macromolecules to its monomer?

• Protein: amino acid

• Carbohydrate: monosaccharide or glucose

• Lipid: glycerol and fatty acid

• Carbohydrate: amino acid

CHEMISTRY: What is the name of the following molecule?

• Monomagnesium dichloride

• Monomagnesium monochloride

• Magnesium chloride

• Magnesium monochloride

Spanish: ¿Dónde se celebra el Día de las Velitas?

•  Colombia

• Peru

• Venezuela

• Mexico

Spanish: How many countries have Spanish as an official language?

• 10

• 20

• 21

• 50

Spanish: ¿Cuándo es la independencia de México?

•  5 de mayo

• 16 de septiembre

• 15 de octubre

• 15 de septiembre

Spanish: ¿Costa Rica neighbors are...

• Ecuador and Venezuela

• El Salvador and Guatemala

• Panama and Nicaragua

• Colombia and Panama

Spanish: Cómo se dice: siblings in Spanish?

• tios

• primos

• hermanos

• abuelos