Genetics-DNA

What do chromosomes look like?

Threadlike structures
What are 5 points on chromosomes?
- Thread like structures
- Contain DNA and protein.
- Contain genetic information
- Occur in pairs
- Found in nucleus of all cells
What do chromosomes contain as well as protein and DNA?

Genetic information
What do chromosomes occur in?

Occur in pairs
Where are chromosomes found?

Found in the nucleus of all cells
Who discovered the structure of DNA?

Watson and Crick
What did Watson and Crick discover?

The structure of the DNA
What does a DNA molecule consist of (shape)?

Double helix (spiral ladder)
DNA molecule is made of what?

Units called nucleotides.
What does a nucleotide consist of?
- Nitrogenous base (rectangle)
- 5-carbon sugar (pentagon)
- Phosphate (circle)
Where are the bases of the nucleotide located along the strands?

The two parallel strands each have a series of bases to the inside. Bases are directly opposite each other
How do the bases of nucleotides link together?

By hydrogen bonds
What are the 4 bases?
- G guanine
- C cytosine
- A adenine
- T thymine
How do the bases pair? (Base pair rule)
- Guanine can only join to cytosine (triple bond)
- Adenine can only join to thymine (double bond)
What are the classes of nitrogenous bases?
- Purine bases : adenine and guanine
- Pyramiding bases: thymine and cytosine

Author

jacquelineglynn

363394

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Genetics-DNA

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Updated

2023-05-17T10:15:25Z

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