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AP Biology
Question | Answer |
---|---|
What is an ionic bond? | Bond created through the transfer of electrons. |
What is a anion? | Atom that gains electrons through an ionic bond and is negative. |
What is a cation? | Atom that loses electrons through an ionic bond and is positive. |
What is a covalent bond? | Bond created through sharing electrons. |
What is the importance of hydrogen bonding? | Hydrogen bonding is when a hydrogen atom is attracted to a adjacent oxygen molecule. |
List the special characteristics of water. | High specific heat, high heat of vaporization, universal solvent, strong cohesion tension, and ice density. |
What is an acid on the pH scale? | pH less than 7 |
What is a base on the pH scale? | pH more than 7 |
What is a buffer? | Substance that resists changes in pH by absorbing excess hydrogen ions or donating hydrogen ions. |
What are the four organic compounds? | Carbohydrates, lipids, proteins, and nucleic acids. |
What elements do carbohydrates consist of? | Carbon, hydrogen and oxygen. |
What is dehydration synthesis? | The joining of a compound by releasing water. |
What is hydrolysis? | The breakdown of a compound by adding water. |
What does a lipid usually consist of? | One glycerol and three fatty acids. |
What do proteins consist of? | Amino acids |
What do nucleic acids consist of? | Many repeating nucleotides. |
Describe primary structures of proteins. | Linear sequence of amino acids. |
Describe secondary structures of proteins. | Results from hydrogen bonding and takes a alpha helix shape. |
Describe tertiary structures of proteins. | Intricate three-dimensional shape of conformation of a protein. |
Describe quaternary structures of proteins. | Consisting of more than one polypeptide chain. |
What is a prokaryotic cell? | Cells with no nucleus or internal membranes. |
What is a eukaryote cell? | Cells with a nucleus or more complex cells. |
What is inside the nucleus? | Chromosomes that are wrapped in special proteins into a chromatin network. |
What is the function of the nucleolus? | Synthesize ribosomes. |
What is the function of a ribosome? | Site of protein synthesis. |
Where are ribosomes located? | In the cytoplasm or attached to the endoplasmic reticulum. |
What is the function of the rough endoplasmic reticulum? | Site of protein synthesis from the attached ribosomes. |
What is the function of the smooth endoplasmic reticulum? | Synthesis of steriod horomones, connects rough endoplasmic reticulum to golgi apparatus, and carries out detoxification processes |
What is the function of the golgi apparatus? | To package substances produced in the rough endoplasmic reticulum and secrete them to other cell parts. |
What is the function of lysosomes? | They are the principal site of intracellular digestion. |
What is the function of peroxisomes? | They contain a catalyst which converts hydrogen peroxide into water and also detoxify alcohol in liver cells. |
What is the function of the mitochondria? | The site of cellular respiration. |
What is the function of vacuoles? | They are membrane-bound structures for storage. |
What is the function of chloroplasts? | The site of photosynthesis ONLY IN PLANT CELLS. |
What is the function of leucoplasts? | Stores starch ONLY IN PLANT CELLS. |
What is the function of chromoplasts? | Stores carotenoid pigments ONLY IN PLANT CELLS. |
What is passive transport? | The movement of molecules down a concentration gradient from a high concentration until equilibrium is met. |
What does hypertonic mean? | Having greater concentration of solute than another solution. |
What does hypotonic mean? | Having lesser concentration of solute than another solution. |