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Prep for sec 1-3
Yoon
Question | Answer |
---|---|
What does DNA do? | carries information to the next generations,determines charcteristics,and copies itself every time a cell divides |
what are nucelotides? | units that make up a dna molecule |
what are the three parts of nucelotides? | deoxiribose sugar,phosphate group,nitrogen base |
what are 4 kinds of nitrogen bases? | adenine,guanine,cytosine,thymine |
what are the letter pairings in DNA? | A and T; G and C |
where is DNA located? | nucleus |
in procaryotic cells where is DNA located? | nucleus but can be in cytoplasm |
in procaryotic cells are single cellular or multicellular? | single |
what is the start codon on the mRNA? | AUG |
What are the stop codons? | UAA, UAG, and UGA |
How many nucleotides code for 1 amino acid? | 3 nucleotides for every 1 amino acid |
What is the tRNA anticodon for the mRNA codon AGU? | UCA |
What is a polypeptide chain? | A protein chain. |
What is the end product of translation? | A polypeptide chain. |
What is always the first amino acid? | Met |
the dna strands are what? | complementary |
replication is carried out by what? | enzymes |
what is step 1 of dna replication? | dna unzips and unwinds |
what is step 2 of dna replication? | |
what is step 3 of dna replication? |