DNA Structure and Function

DNA is _____

• ribonucleic acid
• deoxyribonucleic acid
• deoxyribonucleic atom
• dinitrogenous acid

The basic building blocks of DNA are ______

• amino acids
• lipids
• carbohydrates
• nucleotides

Deoxyribose is a _____

• a lipid

• 5-carbon sugar

• a phosphate

• nitrogen

In DNA, nucleotides are held together by _____

• ionic bonds
• weak hydrogen bonds
• covalent bonds

• oxygenated bonds

The structure of our DNA can be described as _____

• a ladder

• a double helix

• a circle

• an infinite chain

DNA's ribbon-like backbone is made of _____

• deoxyribose sugar and phosphate groups

• carbon atoms

• enzymes and hormones

• nucleotides

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 or biotic.

What is the matching sequence on a strand of DNA that reads AAG CTA TCA?

• AAC GAT AGG

• TTC GTT AGC

• CCT GAT ACC

• TTC GAT AGT

Guanine bonds with ______________.

• adenine

• guanine

• cytosine

• thymine

Adenine bonds with ______________.

• guanine

• thymine

• cytosine

• adenine