BIO 171 UH MANOA EXAM 2; QUESTIONS AND ANSWERS
100% SOLVED
1.What four structures do all cells have? - ANSWER cell membrane , ribosomes ,
genetic material , cytoplasm
2.How does a prokaryotic cell differ from a eukaryotic cell? - ANSWER Eukaryotic
cells contain membrane-bound organelles, prokaryotic cells do not
3. is the cytoskeleton made of? - ANSWER proteins
4. What is the order of taxonomy? - ANSWER Domain, Kingdom, Phylum, Class,
Order, Family, Genus, Species
5. What are the characteristics of life? - ANSWER organization, energy processing,
growth and development, evolutionary adaptation, regulation, reproduction,
response to stumulus
6. What are the three domains? - ANSWER Bacteria, Archaea, Eukarya
7. When does a hypothesis become a theory? - ANSWER when there is
consistency in experiments and data
8.Where do hydrogen bonds form? - ANSWER between slightly positive hydrogen
atom and slightly negative atom of a nearby polar covalent molecule
,9. Do hydrogen bonds form between two different types of molecules, or do they
have to be the same type of molecule? - ANSWER both
10.What do ionic bonds form? - ANSWER ions
11. What is an ionic bond? - ANSWER A chemical bond that's formed when an
atom transfers an electron to another Atom
12. What is a covalent bond? - ANSWER when two atoms share electrons
13. What types of covalent bonds are there? - ANSWER nonpolar and polar
14. What is a nonpolar covalent bond? - ANSWER electrons are shared equally (ex
H2)
15. What is a polar covalent bond? - ANSWER unequal sharing of electrons (ex
H2O)
16. In a polar covalent bond, which atom will have a negative charge? - ANSWER
The one that carries the shared electron more of the time
17. What are the emergent properties of water? - ANSWER cohesive behavior,
ability to moderate temperature, expansion upon freezing (lower density as solid
than liquid), versatility as a solvent
18. Where are emergent properties of water found? - ANSWER In a collection of
water molecules, not just an individual water molecule
,19.Why are water molecules cohesive and adhesive? - ANSWER because they're
polar
20.What is cohesion? - ANSWER Attraction between molecules of the same
substance
21.What is adhesion? - ANSWER An attraction between molecules of different
substances
22.What does cohesion cause? - ANSWER surface tension
23. What is the specific heat of water? - ANSWER The amount of energy it takes to
increase 1 g of a substance by 1 °C
24. What has lower density cold water or warm water? - ANSWER warm water
25. Hydrophilic - ANSWER water loving, dissolves in water
26. Hydrophobic - ANSWER water fearing, does not dissolve in water
27. What are acids? - ANSWER Hydrogen donors, have low pH
28. What are bases? - ANSWER H+(Proton) Acceptors, produce OH-ion, high pH
, 29. Buffer - ANSWER compound that prevents sharp, sudden changes in pH by
accepting OH and H ions
30. organic chemistry - ANSWER the study of all chemicals containing carbon
31. Why is carbon so important? - ANSWER 4 valence electrons means carbon can
form lots of bonds, and a large variety of complex molecules
32. structural isomers - ANSWER Differ in the physical arrangement of the atoms
33. geometric isomers - ANSWER have the same covalent arrangements but differ
in spatial arrangements (cis and trans)
34.Enatiomers - ANSWER Differ in the arrangement of atoms around an
asymmetric carbon
The molecules are mirror images of each other (left/right hand)
35. Where are the same compounds found on a cis version? - ANSWER same side
Where are the same compounds found on a trans version? - ANSWER opposite
sides
Which function group behaves as a base? - ANSWER amimines
What type of biological macromolecules
are steroids? - ANSWER lipids
100% SOLVED
1.What four structures do all cells have? - ANSWER cell membrane , ribosomes ,
genetic material , cytoplasm
2.How does a prokaryotic cell differ from a eukaryotic cell? - ANSWER Eukaryotic
cells contain membrane-bound organelles, prokaryotic cells do not
3. is the cytoskeleton made of? - ANSWER proteins
4. What is the order of taxonomy? - ANSWER Domain, Kingdom, Phylum, Class,
Order, Family, Genus, Species
5. What are the characteristics of life? - ANSWER organization, energy processing,
growth and development, evolutionary adaptation, regulation, reproduction,
response to stumulus
6. What are the three domains? - ANSWER Bacteria, Archaea, Eukarya
7. When does a hypothesis become a theory? - ANSWER when there is
consistency in experiments and data
8.Where do hydrogen bonds form? - ANSWER between slightly positive hydrogen
atom and slightly negative atom of a nearby polar covalent molecule
,9. Do hydrogen bonds form between two different types of molecules, or do they
have to be the same type of molecule? - ANSWER both
10.What do ionic bonds form? - ANSWER ions
11. What is an ionic bond? - ANSWER A chemical bond that's formed when an
atom transfers an electron to another Atom
12. What is a covalent bond? - ANSWER when two atoms share electrons
13. What types of covalent bonds are there? - ANSWER nonpolar and polar
14. What is a nonpolar covalent bond? - ANSWER electrons are shared equally (ex
H2)
15. What is a polar covalent bond? - ANSWER unequal sharing of electrons (ex
H2O)
16. In a polar covalent bond, which atom will have a negative charge? - ANSWER
The one that carries the shared electron more of the time
17. What are the emergent properties of water? - ANSWER cohesive behavior,
ability to moderate temperature, expansion upon freezing (lower density as solid
than liquid), versatility as a solvent
18. Where are emergent properties of water found? - ANSWER In a collection of
water molecules, not just an individual water molecule
,19.Why are water molecules cohesive and adhesive? - ANSWER because they're
polar
20.What is cohesion? - ANSWER Attraction between molecules of the same
substance
21.What is adhesion? - ANSWER An attraction between molecules of different
substances
22.What does cohesion cause? - ANSWER surface tension
23. What is the specific heat of water? - ANSWER The amount of energy it takes to
increase 1 g of a substance by 1 °C
24. What has lower density cold water or warm water? - ANSWER warm water
25. Hydrophilic - ANSWER water loving, dissolves in water
26. Hydrophobic - ANSWER water fearing, does not dissolve in water
27. What are acids? - ANSWER Hydrogen donors, have low pH
28. What are bases? - ANSWER H+(Proton) Acceptors, produce OH-ion, high pH
, 29. Buffer - ANSWER compound that prevents sharp, sudden changes in pH by
accepting OH and H ions
30. organic chemistry - ANSWER the study of all chemicals containing carbon
31. Why is carbon so important? - ANSWER 4 valence electrons means carbon can
form lots of bonds, and a large variety of complex molecules
32. structural isomers - ANSWER Differ in the physical arrangement of the atoms
33. geometric isomers - ANSWER have the same covalent arrangements but differ
in spatial arrangements (cis and trans)
34.Enatiomers - ANSWER Differ in the arrangement of atoms around an
asymmetric carbon
The molecules are mirror images of each other (left/right hand)
35. Where are the same compounds found on a cis version? - ANSWER same side
Where are the same compounds found on a trans version? - ANSWER opposite
sides
Which function group behaves as a base? - ANSWER amimines
What type of biological macromolecules
are steroids? - ANSWER lipids
