Term
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Definition
| An atom of an element that has a number of neutrons different from that of other atoms of the same element. |
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Term
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Definition
| atom that has a positive or negative charge. |
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Term
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Definition
| substance consisting entirely of one type of atom. |
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Term
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Definition
| substance formed by the chemical combination of two or more elements in definite proportions |
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Term
| What information does the atomic number give you? |
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Definition
| the number of protons, the number of electrons, and how reactive it is. |
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Term
| What information does the atomic mass give you? |
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Definition
| the weight and the number of electrons. |
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Term
| What is the difference between DNA and RNA? |
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Definition
| DNA is our building blocks while RNA is the messenger of the the DNA and the nucleus.` |
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Term
| What are the biologically important elements? |
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Definition
- Hydrogen
- Carbon
- Oxygen
- Sodium
- Magnesium
- Phosphorus
- Sulfur
- Potassium
- Calcium
- Iron
- Iodine
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Term
| What is the compisition of a protein? |
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Definition
Carbon
hydrogen
oxygen
nitrogen |
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Term
| what is the composition of carbohydrates? |
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Definition
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Term
| What is the composition of lipids? |
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Definition
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Term
| What is the composition of nucleic acids? |
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Definition
hydrogen
oxygen
nitrogen
carbon
phosphorus |
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Term
| What is Simple Diffusion? |
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Definition
| a process by which molecules tend to move from an area where they are more concentrated to an area where they are less concentrated |
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Term
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Definition
| diffusion of water through a permeable membrane |
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Term
| What is facilitated diffusion? |
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Definition
| the movement of specific molecules across cell membranes through protein channels |
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Term
| What is active transport? |
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Definition
| energy-requiring process that moves material across a cell membrane against concentration difference. |
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Term
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Definition
| the loss of water from a plant through its leaves. |
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Term
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Definition
| the process in which one molecule of glucose is broken in half, producing two molecules of pyruvic acid, a 3-carbon compound. |
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Term
| What type of cells does mitosis occur? |
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Definition
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Term
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Definition
| one of two identical "sister" parts of a duplicated chromosome |
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Term
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Definition
| a three-nucleotide sequenceon mRNA that codes for a single amino acid |
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Term
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Definition
| a group of three bases on a tRNA molecule that are complementry to an mRNA codon. |
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Term
| What are enzymes made out of? |
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Definition
| they are proteins that act as biological catalysts |
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Term
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Definition
| the speed up chemical reactions in the cell |
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Term
| What are restriction enzymes? |
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Definition
| cut molecules in fragments |
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Term
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Definition
| small circular piece of DNA. |
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