DNA & DNA Replication

A nucleotide is composed of which 3 things?

• a sugar, a phosphate group, and a nitrogenous base

• adenine, thymine, and guanine

• carbon, nitrogen, and oxygen

• a nitrogenous base, a sugar, and a protein

Cytosine always pairs with ________________.

• adenine

• thymine

• guanine

• cytosine

What type of sugar is found in DNA?

• ribose

• deoxyribose

• glucose

• fructose

What is the complementary strand for this piece of DNA?

TACTGA

• AGTACT

• CTGTCA

• CGTAGA

• ATGACT

In a DNA molecule, you would always find equal amounts of _____________ and ____________.

• adenine and thymine

• cytosine and thymine

• guanine and adenine

• thymine and guanine

Which enzyme is responsible for unzipping and adding new bases during DNA replication?

• telomerase

• protease

• DNA polymerase

• kinase

Which two scientists are credited with building the first DNA molecule model?

• Franklin and Roosevelt

• Watson and Crick

• Wilson and Collins

• Franklin and Crick

DNA is replicated during which phase of the cell cycle?

• M phase

• G phase

• telophase

• S phase

Nitrogenous bases are held together by ______________ bonds.

• carbon

• hydrogen

• phosphate

• nitrogen

The backbone (sides) of the DNA molecule are made up of alternating _____________ and ____________________ groups.

• adenine and cytosine

• nitrogen and hydrogen

• sugar and nitrogenous base

• sugar and phosphate