Biology Final 2

To help me st udy for

40 cards   |   Total Attempts: 182
  

Cards In This Set

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14% of the DNA nucleotides from a certain organism contain T. What amounts of the other bases would you expect to be present in this particular DNA?
14% A, 36% C, 36% G
A deoxyribose nucleotide is a
Deoxyribose plus a nitrogenous base and a phosphate
Double stranded DNA looks a little like a ladder that has been twisted into a helix, or spiral. Ths side supports of the ladder are
Alternating sugars and phosphates
The strands that make up DNA are antiparallel. This means that
The 5' to 3' direction of one strand is counter to the 5' to 3' direction of the other strand
Why is RNA incorporated into the DNA molecule during DNA replication
DNA polymerases can only add on to an existing strand
One stand of DNA has the sequence 5'-ATTCCG-3' the complementary strand for this is
5'-CGGAAT-3'
Semiconservative replication of DNA involves
Each of the original strands acting as a template for a new strand
In bacteria, the enzyme that removes the RNA primers is called
DNA polymerase 1
Amino Acids are transported to the ribosome for use in building the polypeptide by
TRNA molecules
The nucleotide sequence of mRNA codon is composed of how many bases
3
Protein synthesis takes place on
Ribosomes
Ribosome movement along the mRNA transcript is called
Translation
Eukaryotic mRNA molecules are occasionally interspersed with non-coding sequences that must be removed before protein synthesis. These are called
Introns
Transciption in prokaryotes is carried out by the enzyme____, which unwinds and transcribes the gene.
RNA polymerase
In eukaryotes, the empty RNA molecules exit the ribosome from the
E site