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Biology 171 UH MANOA Questions with complete Solutions
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Biology 171 UH MANOA Questions with complete Solutions
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Biology 171 UH MANOA Questions with complete SolutionsWhat four structures do all cells have? Correct Answer-cell membrane , ribosomes , genetic material , cytoplasm
How does a prokaryotic cell differ from a eukaryotic cell? Correct Answer-Eukaryotic cells contain membrane-bound organelles, prokaryotic cells do not
What is the cytoskeleton made of? Correct Answer-proteins
What is the order of taxonomy? Correct Answer-Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species
What are the characteristics of life? Correct Answer-organization, energy processing, growth and development, evolutionary adaptation, regulation, reproduction, response to stumulus
What are the three domains? Correct Answer-Bacteria, Archaea, Eukarya
When does a hypothesis become a theory? Correct Answer-when there is consistency in experiments and data Where do hydrogen bonds form? Correct Answer-between slightly positive hydrogen atom and slightly negative atom of a nearby polar covalent molecule
Do hydrogen bonds form between two different types of molecules, or do they have to be the same type of molecule? Correct Answer-both
What do ionic bonds form? Correct Answer-ions
What is an ionic bond? Correct Answer-A chemical bond that's formed when an atom transfers an electron to another Atom
What is a covalent bond? Correct Answer-when two atoms share electrons
What types of covalent bonds are there? Correct Answer-nonpolar and polar
What is a nonpolar covalent bond? Correct Answer-electrons are shared equally (ex H2)
What is a polar covalent bond? Correct Answer-unequal sharing of electrons (ex H2O) In a polar covalent bond, which atom will have a negative charge? Correct Answer-The one that carries the shared electron more of the time
What are the emergent properties of water? Correct Answer-cohesive behavior, ability to moderate temperature, expansion upon freezing (lower density as solid than liquid), versatility as a solvent
Where are emergent properties of water found? Correct Answer-In a collection of water molecules, not just an individual water molecule
Why are water molecules cohesive and adhesive? Correct Answer-
because they're polar
What is cohesion? Correct Answer-Attraction between molecules of the same substance
What is adhesion? Correct Answer-An attraction between molecules of different substances
What does cohesion cause? Correct Answer-surface tension
What is the specific heat of water? Correct Answer-The amount of energy it takes to increase 1 g of a substance by 1 °C What has lower density cold water or warm water? Correct Answer-
warm water
Hydrophilic Correct Answer-water loving, dissolves in water
Hydrophobic Correct Answer-water fearing, does not dissolve in water
What are acids? Correct Answer-Hydrogen donors, have low pH
What are bases? Correct Answer-H+(Proton) Acceptors, produce OH-
ion, high pH
Buffer Correct Answer-compound that prevents sharp, sudden changes in pH by accepting OH and H ions
organic chemistry Correct Answer-the study of all chemicals containing carbon
Why is carbon so important? Correct Answer-4 valence electrons means carbon can form lots of bonds, and a large variety of complex molecules
structural isomers Correct Answer-Differ in the physical arrangement of the atoms
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