VCS Biology_ Unit 4_DNA Structure/Function & Replication

Front

What type of bond holds the nitrogen bases together in DNA?

Back

Hydrogen bonds

Front

What is the structure of DNA?

Back

DNA is a double helix composed of two strands of nucleotides, with nitrogen bases paired in the center.

Front

What are the four nitrogen bases in DNA?

Back

Adenine (A), Thymine (T), Cytosine (C), Guanine (G)

Front

What is the role of DNA in living organisms?

Back

DNA serves as the blueprint for traits of all living things.

Front

Why is the sequence of nitrogen bases in DNA important?

Back

The sequence determines the traits that an organism will have.

Front

What is DNA replication?

Back

DNA replication is the process by which DNA makes a copy of itself before cell division.

Front

Why does DNA need to be replicated before cell division?

Back

So that every new cell has a complete set of chromosomes (DNA).

Front

What are covalent bonds?

Back

Covalent bonds are strong bonds that hold the sugar and phosphate backbone of DNA together.

Front

What is the difference between DNA and RNA?

Back

DNA is double-stranded and contains thymine, while RNA is single-stranded and contains uracil.

Front

What is a nucleotide?

Back

A nucleotide is the basic building block of DNA, consisting of a sugar, a phosphate group, and a nitrogen base.