DNA Double helix model

In a molecule of double-stranded DNA, the amount of Adenine present is always equal to the amount of

• cytosine
• guanine
• thymine
• uracil

Why is DNA important?

• it is very small and very complicated

• it's in everything

• it serves as the blueprint for traits of all living things

• because we eat it every day for energy

Nitrogenous bases are joined by which type of bond?

• polar bonds

• ionic bonds

• covalent bonds

• hydrogen bonds

The four types of nucleotides that make up DNA are named for their:

• hydrogen bonds

• nitrogenous bases

• phosphate group

• ring-shaped sugars

Which sequence of DNA bases would pair with this partial strand
ATG TGA CAG

• ATG TGA CAG
• TAC ACT GTC
• GTA AGT GAC
• CAT TCA CTG

Which organelle is DNA usually found in?

• cell membrane

• vacuole

• ribosome

• nucleus

Why do you use a new pipette tip on the micropipette every time you get a new sample?

• To avoid contaminating the other samples

• To use as many tools as you can.

• The pipette tips disappear after being used.

• None of these reasons

The sides of a DNA molecule are made up of sugar molecules alternating with ________________ molecules

• Sulfate

• Phosphate

• Granite

• Gold

Nucleotides are made up of a sugar, phosphate, and..?

• nitrogenous base

• nucleic acid

• cholesterol

• fatty acid

Why is DNA important?

• it is very small and very complicated
• it's in everything
• it serves as the blueprint for traits of all living things
• because we eat it every day for energy