BY5 FLASHCARDS

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  • Created by: jawjeener
  • Created on: 24-02-16 11:18
What is the effect of adding an inhibitor of DNA polymerase to a cell?
Though the nucleotides would match up to their complementary nucleotides on the orginal DNA strand, they would not join together to form a new strand
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In this experiment, why were the bacteria which had incorporated the heavy isotope of nitrogen washed before transfer to a medium containing normal nitrogen?
To prevent contamination so the nitrogen is not incorporated into a new strand
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Why is the process of DNA replication described as semi-conservative?
Half of the original DNA is built into the new DNA strand
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If the bases of the original strange of DNA are GCATTAGC, what would the equivalent sequence of bases on the newly formed strand?
CGTAATCG
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How many bases are required for a chain of 8 consecutive amino acids?
24
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How does a change in one base along the DNA result in a protein becoming non-functional?
A different base might code for a different amino acid and so the sequence of amino acids in the polypeptide will be different
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If a sequence of bases along the template strand of DNA is CCAGGAGAGAATTCATTT, what is the sequence of bases on the mRNA molecule that has been transcribed from this part of the DNA molecule?
GGU / CCU / CUC / UUA / AGU / AA
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How many amino acids does the sequence code for?
6
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If a codon on a section of mRNA has the sequence of bases AUC - what is the sequence of bases found on the template strand of DNA that formed the mRNA codon and the tRNA anticodon that attaches to this codon?
TAG on DNA // UAG on tRNA
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What is the molecule that moves through the nuclear pore to the cytoplasm?
mRNA
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What is the molecule that carries an amino acid to the ribosome?
tRNA
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What is the molecule that is transcribed but not translated?
DNA
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What is the main difference between prophase of mitosis and prophase I of meiosis?
Homologous chromosomes do not pair up during prophase of mitosis but pair up to form bivalents in prophase 1 of meiosis
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If a horses cells contain 64 chromosomes and donkeys have 62 chromosomes and a mule is crossed with a donkey...
...
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How many chormosomes in the cells of a mule?
63
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Why can't mules produce gametes // Why are mules sterile?
Gametes are produced by meiosis // Homologous chromosomes need to pair // This is not possible with 63 chromosomes // Therefore, meiosis cannot take place and so gametes cannot be produced
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Other cards in this set

Card 2

Front

In this experiment, why were the bacteria which had incorporated the heavy isotope of nitrogen washed before transfer to a medium containing normal nitrogen?

Back

To prevent contamination so the nitrogen is not incorporated into a new strand

Card 3

Front

Why is the process of DNA replication described as semi-conservative?

Back

Preview of the front of card 3

Card 4

Front

If the bases of the original strange of DNA are GCATTAGC, what would the equivalent sequence of bases on the newly formed strand?

Back

Preview of the front of card 4

Card 5

Front

How many bases are required for a chain of 8 consecutive amino acids?

Back

Preview of the front of card 5
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