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22 Cards in this Set
- Front
- Back
polymers of nucleotides
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Nucleic Acids
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Examples of nucleic acids
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DNA, RNA
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3 parts of nucleotides
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1. A phosphate group
2. A 5-Carbon Sugar (ribose or deoxyribose) 3. A nitrogen containing base (1 of 5) |
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Guanine pairs with what?
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Cytosine
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What pairs with adenine? In DNA? In RNA?
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thymine, uracil
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DNA is a _____ code, meaning groups of 3 bases stand for one of the 20 amino acids
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triplet
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DNA holds the instructions for the sequence of _____?
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amino acids
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Errors or faults in the DNA sequence can change a protein's ______?
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function
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The movement of particles from an area of greater concentration to an area of lesser concentration?
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diffusion
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lacks membrane bound organelles and has no nucleus.. ex. bacteria
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prokaryote
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contains membrane-bound organelles, including a nucleus.. all other organisms
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eukaryote
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Digestive compartments in a cell?
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Lysosomes- remove or recycle damaged parts
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Membranes are composed of ____ and ____
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phospholipids and proteins
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Membranes appear mosaic because of?
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the proteins embedded in the phospholipids
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Membranes appear fluid because?
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the proteins can drift about in the phospholipids
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glucoproteins and glycolipids serve as?
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i.d tags-> immune system will recognize as one of your cells ex: body doesn't recognize i.d. tags sometimes when there's a virus present
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What helps materials move through the cell?
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cytoskeleton
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Membrane proteins may be: (3)
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1. Enzymes
2. Signal transduction, transmitting signals from one cell to another 3. Transport |
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Membranes have a quality that allows them to get small nonpolar molecules trough membranes easily but some large polar molecules don't come through the membrane as easily, some of the membranes inside cell help move things in & out. What is this quality?
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selective permeability
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anytime that you have a greater concentration of molecules in one region than another
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concentration gradient
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Does moving with the concentration gradient require energy? Against the concentration gradient?
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Yes, No
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Energy is required for the active transport of a solute against its concentration gradient. What energy is that?
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ATP
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