The Structure of DNA

Multiple Choice

DNA is nucleic acid made up of nucleotides joined into long strands or chains by ___ bonds.

• covalent

• hydrogen

• double

• triple

Multiple Choice

What is DNA made up of?

• nucleotides

• ribose acid

• deoxytides

Multiple Choice

Nucleotides are the building blocks of Nucleic Acids.

• This statement is TRUE

• This statement is FALSE

Multiple Select

Nucleotides are made up of which of the following?

(Select ALL that apply)

• deoxyribose sugar

• phosphate group

• nitrogenous base

• carbon molecule

Multiple Select

Which of the following are DNA nitrogenous bases?

(Select ALL that apply)

• Uracil

• Thymine

• Guanine

• Adenine

Multiple Choice

Nitrogenous bases are bases that contain which element?

• carbon

• oxygen

• nitrogen

• hydrogen

Multiple Select

Pyrimidines include which of the following bases?

• Adenine

• Cytosine

• Guanine

• Thymine

Multiple Select

Purines include which of the following bases?

• Adenine

• Cytosine

• Guanine

• Thymine

Multiple Select

Which of the following demonstrates Chargaff's Rule?

• A - G

• C - T

• A - T

• G - C

Fill in the Blank

A double helix looks like a twisted

Multiple Choice

The two strands of DNA run in ___ directions. We call this "antiparallel".

• same

• opposite

• perpendicular

Multiple Choice

With hydrogen bonds, it is possible to separate the two strands of DNA.

• This statement is TRUE

• This statement is FALSE

Multiple Choice

The nearly perfect fit between A-T and C-G nucleotides is called ___ pairing.

• addition

• base

• top

• matched

Multiple Choice

For every cytosine there is __ guanine.

• one

• two

• three

• you only need one cytosine