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DNA: Structure. Happy Tuesday! Bell Work: October 8. Please draw and name the biomolecules below: 2. 3. . Science Fact of the Day: The tongue of a blue whale is bigger than a taxi cab, and can weigh as much as an elephant.

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Presentation Transcript
slide2

Happy Tuesday!

Bell Work: October 8

Please draw and name the biomolecules below:

2.

3.

slide3
Science Fact of the Day:The tongue of a blue whale is bigger than a taxi cab, and can weigh as much as an elephant.
slide4
CO: I will identify the components of DNA and understand its function.LO: I will write notes and practice vocabulary.
so far you ve learned about
So far you’ve learned about…
  • Carbohydrates quick energy, 1:2:1, CHO
  • Lipids
  • Proteins,

Long term energy, cell membranes, fatty acids, CHO

amino acids, many different shapes, enzymes, CHON

Today you’re going to learn about…

  • Nucleic Acids---the fourth kind of biomolecule
slide8
DNA is the biomolecule used to pass on genetic information to the next generation. So…your DNA is half mom, half dad!
slide9

The monomer of DNA is called a nucleotide, which has:1. 5-carbon sugar (deoxyribose)2. phosphate group3. nitrogenous base.This means that the elements in a nucleic acid are: C, H, O, N, and P

there are 4 kinds of nitrogenous bases in dna adenine a guanine g cytosine c thymine t
There are 4 kinds of nitrogenous bases in DNA.Adenine (A),Guanine (G),Cytosine (C),& Thymine (T)
slide11
DNA base pairing rule: adenine and thymine pair together with hydrogen bonds cytosine and guanine pair together with hydrogen bonds

Hydrogen bond

Hydrogen bonds are weak (easily broken) bonds

the differently shaped bases are bonded together antiparallel to one another 5 3
The differently shaped bases are bonded together antiparallel to one another (5’3’)

When enough bases are linked together, the DNA ladder will twist into a double helix shape

slide13

In a Eukaryotic organism the DNA double helix will coil around histones (proteins) and eventually be packed together into chromosomes.DNA is found in the nucleus in Eukaryotic cells.

slide15

Important to Remember: All living things have DNA! Scientists refer to this as a “common genetic code”The sequence of bases matters! The order determines the organism.