Biology Final: Test 2
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- A bag of semi-permeable material contains 2% solution and is put in a beaker that contains 1% solution. The bag will_____.
- gain weight
- The solution in the bag is _____.
- hypertonic
- If salt is added to the beaker until it contains a 2% solution, then the solution in the beaker is now ____.
- isotonic
- Active transport across a biological membrane requires _____ and moves a substance _____ against its concentration gradient.
- energy and transport proteins, against
- Which of the following is the key component in maintaining the fluidity of the cell membrane?
- cholesterol
- Hydrophobic molecules can go directly across cell membranes.
- true
- Drinking saltwater from the ocean is a bad idea because the saltwater is ____ compared to your cells and would cause water to leave your cells.
- hypertonic
- These types of molecules serve as identification tags for your cells to keep your white bloods from destroying them.
- glycoproteins
- If something moves from an area of high concentration this would be referred to as _____.
- moving up a concentration gradient.
- If you see a wilted piece of lettuce at the store, the reason it is wilted is because its cells have lost their ____.
- turgour pressure
- The 1st law of thermodynamics states that the amount of usable energy in the universe always stays the same.
- False.
- ADP + P= ATP The reaction is ___.
- endergonic
- If FADH2 is converted into FAD, FADH2 has ______.
- been oxidized
- For increases in order to occur there must be a/an ____.
- outside source of energy
- Sucrase breaks sucrose down into fructose and glucose. SUCROSE is an example of a/an ___.
- substrate
- Sucrose would bind to sucrase at the ______.
- active site
- If a molecule attached to sucrase and prevented sucrose from binding to it, then that molecule would be a/an ____.
- inhibitor
- Pepsin works well in your stomach, but most enzymes would not work well here because: ____.
- the pH is too low
- The energy source consumed in respiration is _____.
- glucose
- What stage does not take place in the mitochondria?
- glycolysis
- The carbon dioxide that you exhale is produced in what?
- The prepartory reactions
- Where in respiration is the oxygen used that you inhale?
- The ETC
- Where all is NADH produced?
- the Preparatory reactions, glycolysis, the Krebs cycle.
- NADH produced in respiration will carry hydrogens and electrons to ____.
- the ETC
- The movement of ______ directly provides the energy to transform ADP into ATP in the electron transport chain.
- hydrogen ions
- When you exhale, you breathe out water. Where is that water produced?
- the ETC
- What would you use when running a sprint?
- anaerobic respiration
- More ATP is produced in the ETC than in glycolysis, the Prep reactions, and the Krebs cycle combined.
- True
- Your metabolism is directly determined by ____.
- The rate of the chemical reactions in your body.
- The way mosquitos track you down is _____.
- the carbon dioxide you breathe out.
- What is the energy provided by electrons in the ETC used for?
- to move hydrogen ions across a membrane.
- Thermodynamics is specifically the study of ____.
- energy
- _____ occurs in the ETC to FADH2 to provide electrons for the electron transport chain.
- Oxidation