Structure of DNA and RNA

Which molecules make up the "backbone" of DNA and RNA?

• Sugar

• Phosphate group

• Nucleotide base

Thymine will bond with...

• Guanine

• Cytosine

• Adenine

• Uracil

Which bases are only found in DNA?

• Thymine

• Cytosine

• Adenine

• Uracil

• Guanine

What are the parts of a nucleotide?

• phosphate, sugar, base

• A, T, G, C

• Nucleic Acids

• two base pairs connected

Hydrogen bonds occur:

• on the ribbon (between the sugar)

• between the bases

• only between A & T

• only between G & C

What is this a picture of?

• nucleotide

• DNA strand

• chromosome

• gene

DNA is shaped in a:

• double helix

• tightly packed swirl

• twisted ladder

• nucleotide

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

• sugars & phosphates

• nitrogen bases

• sugars

• genes & chromosomes

Cytosine always pairs with

• Adenine
• Thymine
• Uracil
• Guanine

What is the significance of the sequence (order) of the Nitrogen Bases in DNA?

• The order of the Nitrogen Bases determines the number of chromosomes present in an organism.
• The order of the Nitrogen Bases determines the traits that an organism will possess (have).
• The order of the Nitrogen Bases determines the gender of an organism.
• The order of the Nitrogen Bases determines whether an organism is abiotic biotic.