DNA Structure and Function

DNA is

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

DNA's ribbon-like backbone is made of

• deoxyribose sugar and phosphate groups

• carbon atoms

• enzymes and hormones

The twisted ladder shape of a DNA molecule.

• Gene Ladder

• Gene Pool

• Genome

• Double Helix

The weak connection that holds together matching nitrogenous bases.

• Chronic Bond

• Peptide Bond

• Hydrogen Bond

• Double Helix

Is this a picture of DNA? Why?

• Yes, the molecule in the picture is single stranded

• No, the molecule in the picture it is double stranded

• No, the molecule in the picture it is single stranded

• Yes, the molecule in the picture it is double stranded

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.

Which enzyme is responsible for adding new nucleotides to the DNA during DNA replication?

• DNA ligase

• DNA polymerase

• DNA helicase

• restriction enzmes

What is the final product of DNA replication?

• 2 identical copies of DNA

• 1 molecule DNA

• 2 different DNA molecules

Glo Fish contain DNA from sea anemone as well as thier fish DNA. Why are scientists able to combine the DNA sequences of two different organisms

• Both animals have cells that can move

• All DNA has the same building blocks

• Both fish and anemones live underwater so thier cells can be mixed

The enzyme that unwinds the DNA to prepare for replication

• helicase
• replicase
• polymerase
• synthase