January Fourth Science Quiz

• A=T and G=C (ALMOST)
• important: indicates double helix model
• important: confirms base pairing

• substitution- one base is changed to another
• deletion- one base is removed

ex: deletion or substitution of a stop term alters amino acid production

• double helix (two interwoven strands of nucleotides) (spiral staircase)
• displays base pairing- hydrogen bonds between a and t and gc, confirming chargaffs rules

• the flow of genetic info can be moved from DNA to RNA to protein
• DNA--> transcription mRNA---> translation peptide

• bacteriophage (virus) with one DNA radioactive, another with a protein radioactive
• both reactive
• bacterium radioactive with DNA
• not radioactive with protein

shows DNA transfered genetic info, not the protein

segment of DNA that contains all the info needed for protein of RNA synthesis

higher crop yield/more food produces

1-Some changes in environmental cycles (for example, now our dear insect can not eat its food so needs to change his food source!)

RNA single strand, DNA double strand

RNA has U, DNA has T

• mRNA: carries the message from dna in the nucleus to the cytoplasm during protein synthesis, one uncoiled strand
• tRNA: carries the amino acids to the mrna at the ribosome to make the polypeptides, clover shaped
• rRNA: is mostly just a structural one, it makes up the ribosome along with the proteins

ensures each stage stays specified to the organism's unique genetic code