9.1 DNA Structure

What makes up the backbone of a DNA ladder?

• nitrogen bases

• sugars & phosphates

• genes & chromosomes

• RNA

What makes up the rungs (steps) of a DNA ladder?

• sugars & phosphates

• nitrogen bases

• sugars

• genes & chromosomes

What SHAPE is DNA?

• single strand

• double strand

• double helix (twisted ladder)

• DNA has no clear shape

In DNA, what base always pairs with Adenine?

• A

• T

• C

• G

In DNA, what base always pairs with Cytosine?

• C

• T

• A

• G

If one strand of a DNA molecule has the following order of bases, what will be the correct order of bases on the complementary (matching) strand?

AATTGGCC

• AATTGGCC

• TTAACCGG

• GGCCAATT

• GACTGACT

What are the building blocks of DNA called ?

• nucleotides

• cytoplasm

• RNA

• phosphates

Which is NOT one of the three parts of a nucleotide?

• sugar

• base

• ribosome

• phosphate

Where is DNA found in a cell?

• ribosome

• cytoplasm

• mitochondria

• nucleus

What is a section of DNA that codes for a specific protein called?

• RNA

• replication

• gene

• protein