Get your plicker card and answer the following question (based on the date):
8/14: After formulating a hypothesis, a scientist
- proves the hypothesis to be true or false
- tests the hypothesis
- makes sure environmental conditions are just right
- formulates a scientific theory
8/15: “Acidic” is the appropriate description for three of the following. Which one is the exception?
- Excess hydrogen ions
- Magnesium hydroxide
- The contents of the stomach
- A pH less than 7
8/16: Which of the following statements is incorrect?
- An element is made of one specific type of atom.
- An ion is an atom with a net electric charge due to the loss or gain of one or more protons.
- A compound is composed of two or more elements in a fixed ratio.
- An element is defined by the number of protons.
8/17: Which of the following statements regarding carbon is false?
- Carbon has the capacity to form polar covalent bonds with hydrogen.
- Carbon has the ability to form covalent bonds with up to four other atoms.
- Carbon has the capacity to form single and double bonds.
- Carbon has the ability to bond together to form extensive branched or unbranched “carbon skeletons.”
8/18: What defining characteristic of life is observed when a jogging man begins to sweat and when a plant closes its stomata openings in its leaves?
- Cellular makeup
8/22: Which of the following properties of water can be attributed to hydrogen bonding between water molecules?
- Water stabilizes temperature inside and outside the cell
- Water molecules are cohesive
- Water is a solvent for many molecules
- All of these are correct
8/23: Enzymes lower the activation energy by
- Helping substrates get together
- Orienting substrates into positions that favor a reaction
- Shutting out water molecules
- Inducing a fit between the enzyme and the substrate
8/25: With regard to enzymes, what can be said to be the relationship between the substrate and the active site?
- One (or multiple) substrates can bind to the active site and is changed into product(s).
- Every active site will always accept multiple substrates in order to produce a new product.
- The active site of an enzyme combines with the substrate, when a product is given to the enzyme, producing a new molecule.
- A specific product fits into the active site of an enzyme. The enzyme then breaks down the product to make a new substrate.
8/30: Which of the following best distinguishes a prokaryotic cell from a eukaryotic cell?
- Prokaryotic cells have a cell wall, but eukaryotic cells never do.
- Prokaryotic cells are much larger, but eukaryotic cells.
- Prokaryotic cells have flagella, but eukaryotic cells do not.
- Prokaryotic cells do not have a membrane-bound nucleus, but eukaryotic cells do have such a nucleus.
8/31: All cells have some similar cellular components. Which of the following is not found in all cells?
9/5: When a cell is placed in a hypotonic solution,
- Solute exits the cell to equalize the concentration on both sides of the membrane
- Water exits the cell toward the area of lower solute concentration
- Water enters the cell toward the area of higher solute concentration
- There is no net movement of water or solution
9/6: Which of the following best characteristics the structure of the plasma membrane?
- Rigid and unchanging
- Rigid but varying from cell to cell
- Fluid but unorganized
- Very active
9/7: What effect does a hypotonic solution have on a cell?
- It remains the same.
- It causes it to shrink.
- It causes it to swell.
- None of these
9/8: A U-tube is set up with two solutions, solution A and solution B, separated from each other by a semi-permeable membrane. Solution A has a water potential of 3 and solution B has a water potential of 1.5. Which of the following is true?
- Water will move from solution A into solution B.
- Solution is hypertonic compared to solution B.
- Water will move from solution B into solution A.
- Solution B has a higher pressure potential.
9/13: During diffusion, substances move from an area of ____________ concentration to an area of ______________ concentration.
- Higher, lower
- Lower, higher
- Higher, equal
- Lower, equal
9/18: Which of the following is not an advantage a cell gains by having organelles?
- A cell gains the ability to concentrate enzymes and reactants in a small volume, thus increasing the rate of reaction.
- Enzymes for biochemical pathways can be embedded in membranes in their correct sequences, such as the electron carrying proteins of the light reactions.
- Microenvironments can be created, such as pHs, greatly different from the cytosol.
- The complexity of the cell is lowered, thus making it easier for substances to pass freely through the cell.
9/19: The liver is the site for alcohol detoxification, whereas adipocytes store fat. Which organelle would be found in larger amounts in the liver cell, compared to the adipocyte?
- Smooth ER
- Golgi apparatus
9/20: Cell membranes regulate the flow of substances into and out of the cell. Not all molecules are equally soluble. Which of the following is a false statement regarding passage across a cell membrane?
- Small, uncharged, polar molecules can pass through
- Small, hydrophobic molecules can pass through
- Charged particles such as ions are repelled
- Only oxygen and carbon dioxide can easily pass through; all other substances require a transport protein
9/21: Which of the following best describes how the organelles of a eukaryotic cell work together when creating a protein?
- The proteins translated in the nucleus are processed by the rough endoplasmic reticulum, which then export the proteins to their final destination.
- The Golgi apparatus synthesizes proteins and either exports them out of the cell or sends them to the rough endoplasmic reticulum for further processing.
- Proteins synthesized by the ribosomes on the rough endoplasmic reticulum are moved by vacuoles to the Golgi apparatus for processing.
- The smooth endoplasmic reticulum creates proteins, packages them in vacuoles, and sends them to the Golgi apparatus for processing and transport to the final destination.
9/27: ______________ produces __________, which is the energy molecule for the cell.
- Chloroplast, ATP
- Mitochondria, ATP
- Chloroplast, Glucose
- Mitochondria, Glucose
10/2: Which molecules are transferred between the light-dependent reactions and the light-independent reactions (i.e. Calvin cycle)?
- CO2 and ATP
- ATP and NADPH
- NADPH and H2O
- H2O and O2
10/5: Which of the following is an incorrect statement about the Calvin cycle?
- The main inputs to the reactions are NADPH, ATP, and CO2.
- The main outputs of the reactions are NADP+, ADP, and sugar.
- More NADPH is used than ATP during the Calvin cycle.
- Carbon fixation is the first step of the process.
10/9: What is the carbon dioxide source in this experiment?
- Bicarbonate solution
- Acid solution
10/16: Which process requires oxygen to function?
- Aerobic respiration
- Anaerobic respiration
- Lactic acid fermentation
- Alcoholic fermentation
10/18: ATP synthase is
- Both an enzyme that makes ATP and a channel protein, and helps hydrogen ions cross the thylakoid membrane.
- Both an enzyme that makes ATP and a channel protein, and helps hydrogen ions cross the chloroplast membrane.
- Both an enzyme that makes ATP and a carrier protein, and helps hydrogen ions cross the thylakoid membrane.
- Both an enzyme that makes ATP and a carrier protein, and helps hydrogen ions cross the chloroplast membrane.
10/19: Which of the following statements correctly describes a metabolic effect of cyanide, a poison that blocks the passage of electrons along the electron transport chain?
- The pH of the intermembrane space becomes much lower than normal.
- Alcohol would build up in the mitochondria.
- NADH supplies would be exhausted and ATP synthesis would cease.
- No proton gradient would be produced, and ATP synthesis would cease.