Water is a polar molecule. What does this statement mean.
What is the hydrogen side of water is slightly positive and the oxygen side of water is slightly negative.
100
What are the compounds that macromolecules are composed of? And what are the four macromolecules?
What is carbon, hydrogen, nitrogen, oxygen, phosphorus. Carbohydrates, lipids, nucleic acids, proteins.
100
Why is reproduction important.
What is to pass on genetic information and keep the species going.
100
What is a catalyst?
Something that speeds up a reaction.
200
What is the difference between spontaneous generation and biogenesis?
What is spontaneous generation is the idea that living things come from non-living things. Biogenesis is the idea that living things come from other living things.
200
Why does water have a high surface tension.
What is hydrogen bonds between the slightly negative side of one water molecule and the slightly positive side of another water molecule hold water molecules together.
200
What are carbohydrates? Give an example of a monosaccharide and a polysaccharide.
What is sugars that are used for energy. Glucose (immediate energy). Starch (energy storage).
200
Give an example of an external stimulus and an organism's reaction to that stimulus.
What is penguins huddle in Antarctica storms to keep warm.
200
What is an enzyme?
What is proteins that act as biological catalysts.
300
Explain Francesco Redi's experiment and what it proved.
What is Redi set up two jars - covered with meat and uncovered wiith meat. The covered one produced no maggots and thus no flied. The uncovered one produced maggots and then flies. He concluded that spontaneous generation is not correct and biogenesis is correct.
300
Explain why water is polar.
What is oxygen pulls the electrons of the covalent bond toward it. When the electrons are pulled closer to oxygen, the oxygen side is slightly negative, leaving the hydrogens (less electronegative) slightly positive.
300
What are the purpose of lipids? What is the difference between an unsaturated and a saturated fat?
What is used to store energy, important for membranes. Saturated is a fatty acid with the maximum amount of hydrogen bonds. Unsaturated is a fatty acid with a double bonded carbon (so no hydrogens in that area).
300
Define homeostasis.
What is maintaining stable internal body conditions.
300
How do enzymes work in reactions?
What is enzymes lower the activation energy of a reaction to make it go faster.
400
How are energy and homeostasis related in living organisms?
What is you need to use energy to maintain homeostasis - pH levels, internal body temperature . . . etc.
400
What is a solution and what is the difference between a solute and a solvent.
What is a solution is a type of mixture where the components are evenly distributed. Solute - what is dissolved. Solvent - substance in which the solute dissolves.
400
What are nucleic acids and why are they important?
What is macromolecules containing a 5-carbon sugar, a phosphate group, and a nitrogenous base. Used to store genetic information in DNA and RNA.
400
What is the difference between an element and a compound? Give an example of each.
What is an element is a pure substance that consists of one type of atom. Carbon, Gold, Platinum. A compound is a substance formed by the chemical combination of two or more elements in definite proportions. H2O, CO2, NaCl.
400
Explain the lock and key model. Use correct terminology.
What is enzymes have a specific shape so a specific substrate can bind to the active site and the reaction can occur to form products.
500
List the eight characteristics of life.
What is homeostasis, reproduction, energy use, cellular composition, organization, growth/development, adaptation, evolution, DNA/genetic material.
500
What is the difference between cohesion and adhesion. Give examples of each from the demos in class.
What is cohesion is the attraction of molecules of the same substance. When the string got wet the water went down it. Adhesion is the attraction of molecules of different substances. The capillary tube sucked up the water.
500
Why are proteins important and what are they composed of?
What is proteins are important because they have a 3-D shape that gives them a very specific job. They are composed of chains of amino acids.
500
What does pH mean? What is the scale?
What is indicates the concentration of hydrogen ions in solution. 0-14 - less than 7 is acidic, more than 7 is basic/alkaline.
500
Why are enzymes important and what occurs if there is a mutation?
What is enzymes are important to maintain homeostasis. If there is a mutation the 3-D structure is changed and the substrate cannot bind to the active site.