Quiz:

1
Quiz

• An individual living thing is called
• A) species, B) cell, C) DNA, D) organism
• The basic unit of organization for an organism
  is
• A) DNA, B) cell, C) species, D) metabolism
• Problem solving includes
• A) replication, B) making inferences, C) testing
  explanations D) all of the above
• Which should follow an experiment
• A) observations, B) analyzing data, C) making a
  hypothesis D) giving up

2
LEQ Why is understanding the biology of
molecules important to modern biology?

• Assignment Reading 1.4-1.5, 2.1
• Focus on molecular genetics, biotechnology,
  atoms
• Review characteristics of life, themes of bio
• Activator genes and homeostasis
• Summarize how understanding the genes of a
  squirrel could help develop treatments for heart
  attack sufferers.
• Key terms gene, biotechnology

3
Molecular genetics is the study of DNA on the
molecular level .

• Genes are pieces of DNA molecules that store
  genetic information
• Found in all cells
• Cellular function
• Behavior
• Regulation
• Disease
• DNA alteration
• Mutation (DNA)

4

• Sirtuins are currently being studied in
  hibernating mammals and aging mammals.

• slows down metabolism during hibernation
• Shuts off genes promoting energy use
• Implicated in aging

5

• Changes in alpha and beta globin are associated
  with blood disorders and early death.
• Mutation (change)
• Conversion of info alpha thalessemia (sickle
  cell)
• Deletions of info beta thalessemias (various)

6

• Lrp5 gene suppresess tryptophan metabolism in
  serotonin secreting cells of the stomach
• Predict what would happen if Lrp5 levels dropped

7
Biotechnology offers great promise but also
raises many issues.

• Biotechnology is the use and application of
  living things and biological processes.

8
Summary

• Through our understanding of DNA and gene
  products, we can study biology on a molecular
  level.
• What do genes do in cells?
• What happens when the function of a gene is
  altered?
• Use an example to explain your answer.
• Reflection No organ is an island Gerard
  Karsenty.