DNA replication and Protein Synthesis

Which of the following units are repeatedly joined together to form a strand of DNA?

• Amino Acids

• Nucleotides

• Fatty Acids

• Polysaccharides

In what phase of the cell cycle does DNA replication take place?

• G1

• S

• G2

• Prophase

The process of DNA replication is called semi conservative because it results in

• none of these

• Two DNA molecules.  One original molecule and one with two new strands

• two exact copies with new strands

• two DNA molecules, each with 1 original strand and one new.

Why does DNA replicate?

• To create a duplicate copy in case the original gets damaged

• New cells will have a copy of the DNA

• To create a new copy to replace the damaged original

Nitrogen bases are joined by which type of bond?

• polar bonds

• hydrogen bonds

• phosphate bonds

• deoxyribose bonds

Adenine bonds with _____

• Cytosine

• Thymine

• Guanine

• Uracil

Cytosine bonds with ____

• Adenine

• Thymine

• Guanine

• Uracil

What is needed for DNA replication to unzip at the hydrogen bonds?

• phosphates

• enzymes

• deoxyribose (sugar)

• hydrogen

What causes mutations?

• the environment

• random assortment

• chemicals

• independent assortment

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-2

Match the following

• Tells where to start

• Helicase

• Glues fragments together

• DNA Polymerase

• The unzipper

• Ligase

• Builds the new strand

• Primase