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UAB Biology 123 Exam 1 Study Guide Questions and Answers (100% Pass)

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  • UAB Biology 123
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  • UAB Biology 123

Correct ordering of biological organization? → 1. Biosphere → 2. Ecosystems → 3. Communities → 4. Populations → 5. Organisms → 6. Organs → 7. Tissues → 8. Cells → 9. Organelles → 10. Molecules Polar → distribution of electrons between the covalently bonded atoms ...

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  • September 25, 2024
  • 41
  • 2024/2025
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  • UAB Biology 123
  • UAB Biology 123
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1 | P a g e | © copyright 2024/2025 | Grade A+



UAB Biology 123 Exam 1 Study Guide
Questions and Answers (100% Pass)
Correct ordering of biological organization?


→ 1. Biosphere

→ 2. Ecosystems

→ 3. Communities

→ 4. Populations

→ 5. Organisms

→ 6. Organs

→ 7. Tissues

→ 8. Cells

→ 9. Organelles

→ 10. Molecules




Polar


→ distribution of electrons between the covalently bonded

atoms is not even




Three tenets of cell theory




Master01 | September, 2024/2025 | Latest update

, 1 | P a g e | © copyright 2024/2025 | Grade A+


→ 1) All living organisms composed of one or more cells


2)Cell is the basic unit or structure and organization in organisms


3)Cells come from pre-existing cells




covalent bond


→ a chemical bond that involves the sharing of electron pairs

between atoms




hydrogen bond


→ weak chemical bond formed when the slightly positive

hydrogen atom of a polar covalent bond in one molecule is

attracted to the slightly negative atom of a polar covalent

bond in another molecule.




ionic bond


→ transfer of electrons, A chemical bond resulting from the

attraction between oppositely charged ions.




van der Waals forces



Master01 | September, 2024/2025 | Latest update

, 1 | P a g e | © copyright 2024/2025 | Grade A+


→ the relatively weak attractive forces that are operative

between neutral atoms and molecules and that arise because

of the electric polarization induced in each of the particles




A covalent bond is likely to be polar when


→ one of the atoms sharing electrons is much more

electronegative than the other atom




DNA nucleotide


→ Deoxyribose Sugar, Bases GCAT, and Phosphate Group




RNA nucleotide


→ Ribose Sugar, Bases GCAU, and Phosphate Group




Triglycerides


→ an energy-rich compound made up of a single molecule of

glycerol and three molecules of fatty acid.




Phospholipids


Master01 | September, 2024/2025 | Latest update

, 1 | P a g e | © copyright 2024/2025 | Grade A+


→ a lipid consisting of a glycerol bound to two fatty acids and a

phosphate group.




Which element makes the greatest percentage of the human body mass?


→ Ca- 1.5%


Fe- <.05


I- <.05


O- 65%


C- 18.5%




31^P compared to 32^P, what is the difference?


→ One more neuron




The particle negative charge in a molecule of water occurs because


→ a hydrogen bond




Water molecules are able to form hydrogen bonds with


→ compounds that have polar covalent bonds.



Master01 | September, 2024/2025 | Latest update

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