Mrs. Padilla- 7th Grade Life Science

UPDATE: Science Homework \| Science Notes \| Homework Copies \| Slate \| Cool Science Links \| UpdateIndex \| Help

VIEW: Home \| Science Homework \| Science Notes \| Homework Copies \| Slate \| Cool Science Links

Visit the TeacherWeb® videos to learn about the features, modifications, and customizations available on your website. Click here to learn more. Science Notes <SPAN lang=EN> <P class=MsoNormal style="MARGIN: 0in 0in 0pt; TEXT-ALIGN: center" align=center><U><SPAN style="FONT-SIZE: 18pt; FONT-FAMILY: Arial; mso-bidi-font-weight: bold">DNA Structure and Replication<o:p></o:p></SPAN></U></P> <P class=MsoNormal style="MARGIN: 0in 0in 0pt"><STRONG><SPAN style="COLOR: #33cccc; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></STRONG></P> <P class=MsoNormal style="MARGIN: 0in 0in 0pt"><STRONG><SPAN style="COLOR: #33cccc; FONT-FAMILY: Arial">DNA Structure (reading handout)<o:p></o:p></SPAN></STRONG></P> <P class=MsoNormal style="MARGIN: 0in 0in 0pt 0.45in; TEXT-INDENT: -0.2in; mso-list: l1 level1 lfo3; tab-stops: list .45in"><SPAN style="FONT-FAMILY: Symbol; mso-bidi-font-weight: bold; mso-fareast-font-family: Symbol; mso-bidi-font-family: Symbol"><SPAN style="mso-list: Ignore">·<SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN></SPAN><SPAN style="FONT-FAMILY: Arial; mso-bidi-font-weight: bold">DNA’s shape is known as a double helix (it looks like a twisted ladder)<o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0in 0in 0pt 0.45in; TEXT-INDENT: -0.2in; mso-list: l1 level1 lfo3; tab-stops: list .45in"><SPAN style="FONT-FAMILY: Symbol; mso-bidi-font-weight: bold; mso-fareast-font-family: Symbol; mso-bidi-font-family: Symbol"><SPAN style="mso-list: Ignore">·<SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN></SPAN><SPAN style="FONT-FAMILY: Arial; mso-bidi-font-weight: bold">DNA’s main building piece is a nucleotide<o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0in 0in 0pt 0.45in; TEXT-INDENT: -0.2in; mso-list: l1 level1 lfo3; tab-stops: list .45in"><SPAN style="FONT-FAMILY: Symbol; mso-bidi-font-weight: bold; mso-fareast-font-family: Symbol; mso-bidi-font-family: Symbol"><SPAN style="mso-list: Ignore">·<SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN></SPAN><SPAN style="FONT-FAMILY: Arial; mso-bidi-font-weight: bold">Each nucleotide is made of a deoxyribose (sugar), phosphate and a nitrogen base.<o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0in 0in 0pt 0.45in; TEXT-INDENT: -0.2in; mso-list: l1 level1 lfo3; tab-stops: list .45in"><SPAN style="FONT-FAMILY: Symbol; mso-bidi-font-weight: bold; mso-fareast-font-family: Symbol; mso-bidi-font-family: Symbol"><SPAN style="mso-list: Ignore">·<SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN></SPAN><SPAN style="FONT-FAMILY: Arial; mso-bidi-font-weight: bold">The nucleotides connect in two places:<o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0in 0in 0pt 1in; TEXT-INDENT: -0.25in; mso-list: l1 level2 lfo3; tab-stops: list 1.0in"><SPAN style="FONT-FAMILY: 'Courier New'; mso-bidi-font-weight: bold; mso-fareast-font-family: 'Courier New'"><SPAN style="mso-list: Ignore">o<SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN></SPAN><SPAN style="FONT-FAMILY: Arial; mso-bidi-font-weight: bold">Between the phosphate and the sugar<o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0in 0in 0pt 1in; TEXT-INDENT: -0.25in; mso-list: l1 level2 lfo3; tab-stops: list 1.0in"><SPAN style="FONT-FAMILY: 'Courier New'; mso-bidi-font-weight: bold; mso-fareast-font-family: 'Courier New'"><SPAN style="mso-list: Ignore">o<SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN></SPAN><SPAN style="FONT-FAMILY: Arial; mso-bidi-font-weight: bold">Between the nitrogen bases<o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0in 0in 0pt 0.45in; TEXT-INDENT: -0.2in; mso-list: l1 level1 lfo3; tab-stops: list .45in"><SPAN style="FONT-FAMILY: Symbol; mso-bidi-font-weight: bold; mso-fareast-font-family: Symbol; mso-bidi-font-family: Symbol"><SPAN style="mso-list: Ignore">·<SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN></SPAN><SPAN style="FONT-FAMILY: Arial; mso-bidi-font-weight: bold">The “uprights” or sides of the DNA ladder are made of deoxyribose and phosphate<o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0in 0in 0pt 0.45in; TEXT-INDENT: -0.2in; mso-list: l1 level1 lfo3; tab-stops: list .45in"><SPAN style="FONT-FAMILY: Symbol; mso-bidi-font-weight: bold; mso-fareast-font-family: Symbol; mso-bidi-font-family: Symbol"><SPAN style="mso-list: Ignore">·<SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN></SPAN><v:shapetype id=_x0000_t75 stroked="f" filled="f" path="m@4@5l@4@11@9@11@9@5xe" o:preferrelative="t" o:spt="75" coordsize="21600,21600"><v:stroke joinstyle="miter"></v:stroke><v:formulas><v:f eqn="if lineDrawn pixelLineWidth 0"></v:f><v:f eqn="sum @0 1 0"></v:f><v:f eqn="sum 0 0 @1"></v:f><v:f eqn="prod @2 1 2"></v:f><v:f eqn="prod @3 21600 pixelWidth"></v:f><v:f eqn="prod @3 21600 pixelHeight"></v:f><v:f eqn="sum @0 0 1"></v:f><v:f eqn="prod @6 1 2"></v:f><v:f eqn="prod @7 21600 pixelWidth"></v:f><v:f eqn="sum @8 21600 0"></v:f><v:f eqn="prod @7 21600 pixelHeight"></v:f><v:f eqn="sum @10 21600 0"></v:f></v:formulas><v:path o:connecttype="rect" gradientshapeok="t" o:extrusionok="f"></v:path><o:lock aspectratio="t" v:ext="edit"></o:lock></v:shapetype><v:shape id=_x0000_s1026 style="MARGIN-TOP: 3.45pt; Z-INDEX: -1; LEFT: 0px; MARGIN-LEFT: 135pt; WIDTH: 317.3pt; POSITION: absolute; HEIGHT: 224.35pt; TEXT-ALIGN: left" wrapcoords="-51 0 -51 21456 21600 21456 21600 0 -51 0" type="#_x0000_t75"><v:imagedata o:title="" src="file:///C:\DOCUME~1\padillas\LOCALS~1\Temp\3\msohtml1\01\clip_image001.emz"></v:imagedata></v:shape><SPAN style="FONT-FAMILY: Arial; mso-bidi-font-weight: bold">The “rungs” of the DNA ladder are made of nitrogen bases<o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0in 0in 0pt 0.45in; TEXT-INDENT: -0.2in; mso-list: l1 level1 lfo3; tab-stops: list .45in"><SPAN style="FONT-FAMILY: Symbol; mso-bidi-font-weight: bold; mso-fareast-font-family: Symbol; mso-bidi-font-family: Symbol"><SPAN style="mso-list: Ignore">·<SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN></SPAN><SPAN style="FONT-FAMILY: Arial; mso-bidi-font-weight: bold">The four types of nitrogen bases are:<o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0in 0in 0pt 1in; TEXT-INDENT: -0.25in; mso-list: l1 level2 lfo3; tab-stops: list 1.0in"><SPAN style="FONT-FAMILY: 'Courier New'; mso-bidi-font-weight: bold; mso-fareast-font-family: 'Courier New'"><SPAN style="mso-list: Ignore">o<SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN></SPAN><SPAN style="FONT-FAMILY: Arial; mso-bidi-font-weight: bold">adenine<o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0in 0in 0pt 1in; TEXT-INDENT: -0.25in; mso-list: l1 level2 lfo3; tab-stops: list 1.0in"><SPAN style="FONT-FAMILY: 'Courier New'; mso-bidi-font-weight: bold; mso-fareast-font-family: 'Courier New'"><SPAN style="mso-list: Ignore">o<SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN></SPAN><SPAN style="FONT-FAMILY: Arial; mso-bidi-font-weight: bold">thymine<o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0in 0in 0pt 1in; TEXT-INDENT: -0.25in; mso-list: l1 level2 lfo3; tab-stops: list 1.0in"><SPAN style="FONT-FAMILY: 'Courier New'; mso-bidi-font-weight: bold; mso-fareast-font-family: 'Courier New'"><SPAN style="mso-list: Ignore">o<SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN></SPAN><SPAN style="FONT-FAMILY: Arial; mso-bidi-font-weight: bold">cytosine<o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0in 0in 0pt 1in; TEXT-INDENT: -0.25in; mso-list: l1 level2 lfo3; tab-stops: list 1.0in"><SPAN style="FONT-FAMILY: 'Courier New'; mso-bidi-font-weight: bold; mso-fareast-font-family: 'Courier New'"><SPAN style="mso-list: Ignore">o<SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN></SPAN>guanine</P> <P class=MsoNormal style="MARGIN: 0in 0in 0pt"><STRONG><SPAN style="COLOR: #33cccc; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></STRONG></P> <P class=MsoNormal style="MARGIN: 0in 0in 0pt"><STRONG><SPAN style="COLOR: #33cccc; FONT-FAMILY: Arial">DNA Replication (pages 78-79)<o:p></o:p></SPAN></STRONG></P> <UL style="MARGIN-TOP: 0in" type=disc> <LI class=MsoNormal style="MARGIN: 0in 0in 0pt; mso-list: l0 level1 lfo1; tab-stops: list .5in"><SPAN style="FONT-FAMILY: Arial">DNA replication needs to happen so that each daughter cell has an exact copy of the genetic information</SPAN><SPAN style="FONT-FAMILY: Arial"><o:p> </o:p></SPAN> </LI> </UL> <P class=MsoNormal style="MARGIN: 0in 0in 0pt 0.25in"><SPAN style="COLOR: purple; FONT-FAMILY: Arial">The Structure of DNA (page 78)<o:p></o:p></SPAN></P> <UL style="MARGIN-TOP: 0in" type=disc> <LI class=MsoNormal style="MARGIN: 0in 0in 0pt; mso-list: l0 level1 lfo1; tab-stops: list .5in"><SPAN style="FONT-FAMILY: Arial">DNA is in the shape of a twisted ladder known as a double helix<o:p></o:p></SPAN></LI> <LI class=MsoNormal style="MARGIN: 0in 0in 0pt; mso-list: l0 level1 lfo1; tab-stops: list .5in"><SPAN style="FONT-FAMILY: Arial">Nitrogen base pairs form the rungs of the ladder<o:p></o:p></SPAN></LI> <LI class=MsoNormal style="MARGIN: 0in 0in 0pt; mso-list: l0 level1 lfo1; tab-stops: list .5in"><SPAN style="FONT-FAMILY: Arial">In the base pairs, adenine (A) matches with thymine (T) and guanine (G) matches with cytosine (C)<o:p></o:p></SPAN> </LI> </UL> <P class=MsoNormal style="MARGIN: 0in 0in 0pt 0.25in"><SPAN style="COLOR: purple; FONT-FAMILY: Arial">The Replication Process (page 79)<o:p></o:p></SPAN></P> <UL style="MARGIN-TOP: 0in" type=disc> <LI class=MsoNormal style="MARGIN: 0in 0in 0pt; mso-list: l2 level1 lfo2; tab-stops: list .5in"><SPAN style="FONT-FAMILY: Arial">To replicate, DNA pulls apart between the base pairs<o:p></o:p></SPAN></LI> <LI class=MsoNormal style="MARGIN: 0in 0in 0pt; mso-list: l2 level1 lfo2; tab-stops: list .5in"><SPAN style="FONT-FAMILY: Arial">New bases in the nucleus match up in the same A-T and G-C pairs</SPAN></LI> <LI class=MsoNormal style="MARGIN: 0in 0in 0pt; mso-list: l2 level1 lfo2; tab-stops: list .5in">The order in the new DNA molecule should exactly match the order in the old DNA molecule </LI> </UL> </SPAN> Or, would you like to view and optionally restore one of these previous versions? Password: Forgot your password?

Mrs. Padilla- 7th Grade Life Science

Science Notes

©2009 TeacherWeb, Inc.