DNA

1
DNA
Replication of DNA
DNA, RNA, And Protein
Gene Regulation And mutation
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What are the 4 nitrohenous bases?
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Guanine, adenine, thymine and cytocine
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What is DNA often compared to?
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Twisted ladder
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What are nucleotides made out of?
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Sugar, phosphate group, and a nitrogenous base
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What did James Watson and Francis Crick discover?
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Double helix
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Who had the transformation experiment that
demonstrated the change of rough bacteria into
smooth?
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Griffith
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What bases bind together as a complement?
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Adenine to ThymineThymine to AdenineGuanine to
CytosineCytosine to Guanine
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What is responsible for unwinding and unzipping
the double helix?
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DNA helicase
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What are the stages of DNA replication?
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Unwinding, base pairing, joining, replication
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What are two proteins associated in replication
of DNA?
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DNA helicase, RNA primase, DNA polymerase, Single
stranded binding protein
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What is the difference between eukaryotes and
prokaryotes for the number of orgins for DNA
replication?
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Eukaryotes have multipleProkaryotes only have one
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What is RNA?
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Nucleic acid
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What is the code for TGA?
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ACU
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What is Beadle and Tatums hypothesis?
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One gene codes for one polypeptide
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What are the three types of RNA and their
functions?
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mRNA- travel from the nucleus to the ribosome to
direct synthesis of specific proteins.rRNA-
proteins to form ribosome in the cytoplasm.tRNA-
transports amino acids to the ribosome.
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____codes for _____directs the synthesis of
________
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DNA, RNA, Proteins
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What is a Hox gene?
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Crucial in development and decides which part
goes where.
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What is deletion a cause from?
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Framework
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How many steps occurs in tryptophan synthesis?
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5
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T/F An operator is a segment of DNA that acts as
an on/off switch for translation.
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True
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What blocks transcription when the operon is off?
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A repressor
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What is the difference between Intron and exon?
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Exton stays, intron goes
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What is gene regulation?
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Ability of an organism to control which genes are
transcribed in response to the environment.
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What is a codon?
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A 3 base code in DNA or RNA
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What is a mutagen?
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Substance that causes mutations
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What is a transcription?
51
Process in which water evaporates from the inside
to the outside