DNA structure and replication

What are the 4 nitrogen bases?

• adenine, thymine, cytoplasm, and guanine
• adenine, thymine cytosine, and guanine
• adenine, thymine, cytosine, and gylcerol
• adenine, thymine, cytosine, and glucose

Which 2 molecules forms the sides (backbone) of the DNA ladder?

• deoxyribose and adenine
• deoxyribose and a hydrogen bond
• sugar and the nucleus
• deoxyribose (sugar) and phosphate

Which of the following best describes a DNA molecule?

• double helix
• contains ribose
• made of amino acids
• contains Uracil

Tags

NGSS.HS-LS1-1

Which of the following units are repeatedly joined together to form a strand of DNA? (This is the MONOMER of DNA.) 

• amino acids
• nucleotides
• fatty acids
• polysaccharides

Adenine base pairs with ______________ on the opposite DNA strand

• Guanine

• Thymine

• Cytosine

• Adenine

Guanine bonds with ______________.

• Adenine
• Guanine
• Cytosine
• Thymine

Which enzyme is responsible for adding nucleotides with a covalent to a growing DNA strand?

• Topoisomerase

• DNA Polymerase

• Ligase

• Primase

The nucleic acid DNA is composed of

• sugar, protein, and nitrogenous bases.

• protein, nitrogenous bases, and phosphate.

• nitrogenous bases, phosphate, and RNA.

• deoxyribose sugar, phosphate, and nitrogenous bases.

Which of the following is an enzyme used during DNA Replication to split Hydrogen Bonds and unwind the helix?

• ATP

• Helicase

• Catalase

• DNA

Select the proper sequence of events.

• DNA Unzips then nucleotides are added, DNA Zips resulting into 2 strands of DNA
• DNA makes an exact copy of itself.
• New Nucleotides are added and then DNA unzips and becomes single stranded.
• Nucleottides are added and then the DNA Unzips.