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Classification
| Question | Answer |
|---|---|
| classification | putting objects into similar groups |
| taxonomy | the science of classifying organisms |
| species | a group of similar organisms which can successfully interbreed with each other and not organisms from other species to produce fertile offspring |
| variation within a species | within groups of similar organisms, individual members show different characteristics |
| heredity | passing on of characteristics from parents to offspring by way of genes - genetic inheritance |
| gene | a section of DNA that codes for a specific protein |
| why do biologists classify organisms? -2 reasons | 1- to simplify their research 2- to facilitate communication between scientists |
| composition of chromosomes: | 40% strands of DNA tightly coiled around 60% proteins called histones |
| Name the two groups of nitrogenous bases: | purines-adenine and guanine and pyramidines-cytosine and thymine THE BASE PAIRS BOND WITH WEAK HYDROGEN BONDS BTW |
| formation of nucleotides: | phosphate group, deoxyribose sugar and a nitrogenous base |
| How do nucleotides attach? | the phosphate groups from a nucleotide bonds with the pentose sugar in the next nucleotide, whose phosphate group bonds with the following one and so on ... this forms a polynucleotide chain |
| Which scientists discovered the structure of DNA and what is it called? | james watson & francis crick - double helix shape |
Created by:
serrraphina
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