Review DNA What are the four major classes

What are the four major classes of macromolecules? Carbohydrates Proteins Lipids Nucleic acids nucleic

What are two types of nucleic acids: DNA _____ or deoxyribonucleic acid _____ or

What are the monomers (repeating units) nucleotides in DNA? ___________ nucleotide DNA nucleotide

What are three parts of a nucleotide? A Phosphate group A Sugar A Base

What is this? A NUCLEOTIDE ? base phosphate ? ? sugar

How many different nucleotides are there in DNA? four How do they differ? A

What are four different bases in DNA? A T C G

Four different nucleotides They differ in their base!!! P Sugar Adenine P Sugar Thymine

Describe DNA consists of two complementary strands of nucleotides shaped like a double helix

How do the bases pair up? A --- T C --- G

A nucleotide What molecule is this? ________ phosphate ? base ? ? sugar

phosphate nucleotide sugar hydrogen bonds base nucleotide What is this a molecule of? _____

What is the complementary strand of the DNA strand below: A C A G

Determine the other complementary strand of the DNA strand below. A C A G

One DNA What is the duplicating or copying of DNA called? 1 DNA replication.

Where in the cells does DNA replication occur? In the nucleus

When is DNA replicated? During interphase

DNA replication occurs during interphase before…. before a cell divides

Why do cells divide? To replace old or dead cells To replace cells destroyed

The steps in DNA replication: 1. An enzyme unzips the double helix, separating the

2. DNA polymerase (an enzyme) attaches free-floating nucleotides, one by one, to the exposed

One DNA 1 3. The result is two identical DNA molecules. 1 2 Two

What is this process called? DNA REPLICATION

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Review DNA

What are the four major classes of macromolecules? Carbohydrates Proteins Lipids Nucleic acids nucleic acid DNA is a ________ ?

What are two types of nucleic acids: DNA _____ or deoxyribonucleic acid _____ or ribonucleic acid RNA

What are the monomers (repeating units) nucleotides in DNA? ___________ nucleotide DNA nucleotide

What are three parts of a nucleotide? A Phosphate group A Sugar A Base A NUCLEOTIDE P Sugar Base

What is this? A NUCLEOTIDE ? base phosphate ? ? sugar

How many different nucleotides are there in DNA? four How do they differ? A NUCLEOTIDE P Sugar Base They differ In their base

What are four different bases in DNA? A T C G

Four different nucleotides They differ in their base!!! P Sugar Adenine P Sugar Thymine The language of DNA consists of only four letters! Imagine that!!! P Sugar Cytosine P Sugar Guanine

Describe DNA consists of two complementary strands of nucleotides shaped like a double helix the sides or backbone are made of phosphate and sugar and the inside is made of two bases A --- T C --- G

How do the bases pair up? A --- T C --- G

DNA What is this a molecule of? _____

A nucleotide What molecule is this? ________ phosphate ? base ? ? sugar

phosphate nucleotide sugar hydrogen bonds base nucleotide What is this a molecule of? _____ DNA

What is the complementary strand of the DNA strand below: A C A G T T G C A A G T C C G T C A

Determine the other complementary strand of the DNA strand below. A C A G T T G C A A G T C C G T C A A C G T T C A G G C

One DNA What is the duplicating or copying of DNA called? 1 DNA replication. 2 1 Two DNA

Where in the cells does DNA replication occur? In the nucleus

When is DNA replicated? During interphase

DNA replication occurs during interphase before…. before a cell divides

Why do cells divide? To replace old or dead cells To replace cells destroyed by injury for growth and development. For asexual reproduction

The steps in DNA replication: 1. An enzyme unzips the double helix, separating the two strands.

2. DNA polymerase (an enzyme) attaches free-floating nucleotides, one by one, to the exposed bases on each strand. Exposed bases Free nucleotide

One DNA 1 3. The result is two identical DNA molecules. 1 2 Two DNA

What is this process called? DNA REPLICATION