DNA
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| EVIDENCE DNA IS HEREDITARY MATERIAL... | PROVING: USING MICE A, BACTERIUM THAT CAUSED PNEUMONIA. THE 2 FORMS WHERE THE SAFE
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| EACH INDIVIDUAL INHERITS STRAIN R STRAIN AND THE HARMFUL FORM – S STRAIN.MICE INJECTED WITH LIVING R STRAIN AND DEAD S STRAIN. – BOTH GROUPS REMAINED HEALTHY. |
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| BUT WHEN MICE INJECTED WITH BOTH ... | THEY GOT PNEUMONIA.
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| THE SAFE FORM CAN MAKE TOXIN BUT DOESN'T HAVE THE INFO SO .... | THE INFO MAY HAD BEEN PASSED FORM THE HARMFUL TO THE SAFE.
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| DNA CAN BE PASSED FROM ONE ... | BACTERIUM TO ANOTHER BY VIRUSES.
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| ELECTRON MICROSCOPES PROVIDED IMAGES OF DNA... | GOING FROM VIRUSES INTO BACTERIAL CELLS.
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| THE GENETIC INFO IS IN THE FORM OF... | A SPECIFIC SEQUENCE OF BASES ALONG THE DNA MOL.
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| GENES DETERMINE THE PROTEINS... | IN AN ORGANISM.
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| POLYPEPTIDE IS A ... | SEQUENCES OF AMINO ACIDS.
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| WHY WASN’T 2 BASE PAIRS USED FOR CODE ... | ONLY PRODUCED 16 POSIBLE CODES INADEQUATE.
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| AS CODE HAS 3 BASES CALLED TRIPLET CODE ... | 64 POS CODES ONLY 20 AMINO .
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| IN EUKARYOTES MUCH OF DNA DOESN'T CODE FOR AMINO A CALLED... | INTRON AND CAN OCCUR WITHIN GENE AND MULTIPLE REPEATS.
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| THE CODE IS KNOWN AS THE DEGENERATE CODES BECAUSE.... | MOST AMINO A HAVE MORE THAN ONE TRIPLET CODE.
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| THE START OF THE SEQUENCE ON TRIPLET CODE ALWAYS ... | METHIONINE , IT CAN BE REMOVED IF IT DOESN'T FORM PART OF THE FINAL POLYPEPTIDE.
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| TRIPLET CODES MARKS END OF POLYPEPTIDE CHAIN AND CALLED.. | ‘STOP CODES’. THE CODE IS UNIVERSAL.
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| DNA AND CHROMOSOMES IN PROKARYOTES CELL .. | E.G. BACTERIA, THE DNA MOLS ARE SMALLER, CIRCULAR AND NOT ASSOCIATED WITH PROTEIN MOLECULES. – SO DON’T HAVE CHROMOSOMES.
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| DNA IN EUKARYOTES ... | IS LINEAR AN LARGER AND ARE ASSOCIATED WITH PROTEINS TO FORM CHROMOSOMES.
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| CHROMOSOME STRUCTURE: ONLY VISIBLE... | WHEN CELL IS DIVIDING.,
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| CHROMOSIOMS APPEAR AS ... | 2 THREADS HELD BY A CENTROMERE (HYDROGEN BONDS) AND CALLED CHROMATIDS.
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| THE DNA IN CHROMOSOMES ARE HELD IN POSITION BY... | PROTEINS.THE CONSIDERABLE LENGTH OF DNA FOUND IN EACH CELL (AROUND 2M IN EVERY CELL).
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| HOW DOE’S DNA FIT IN CHROMOSOMES ... | IS COILED AND FOLDED. THE HELIX IS WOUND AROUND PROTEINS TO FIX IT IN POSITION, THIS DNA PROTEIN COMPLEX IS THEN COILED. COILS FORM LOOPS – LOOPS COILS AND PACK TOGETHER TO FORM CHROMOSOMES.
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| WHY IS THE DNA COILED AND FOLDED ... | THIS WAY A LOT OF DNA PACKED IN SINGLE CHROMOSOME. A SINGLE MOL OF DNA/2M.
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| THIS SINGLE DNA HAS MANY GENES ALONG LENGTH EACH GENE... | OCCUPIES A SPECIFIC POSITION ALONG DNA MOLECULE.
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| CHROMOSOMES ALWAYS EQUAL COZ ... | CHROMOSOME OCCUR IN PAIRS (HOMOLOGOUS PAIRS).
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| HOMOLOGOUS CHROMOSOMES COZ | SEXUALLY PRODUCED ORGANISM CONTRIBUTE A SET OF CHROMOSOMES BY FUSION OF EGG AND SPERM.
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| MOTHERS AND FATHER CHROMOSOMES CALLED ... | IN EGG(MATERNAL CHROMS), FATHER (PATERNAL CHROMS.)
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| IN MEIOSIS THE HALVING OF NUMBER OF CHROMOSOMES ENSURE EACH DAUGHTER CELL.... | HAS ONE CHROMOSOMES FORM EACH HOMOLOGOUS PAIR. – SO EACH CELL RECEIVES ONE SET OF INFO FOR EACH CHARACTERISTIC.
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| WHEN THESE HAPLOID CELL COMBINE... | THE DIPLOID STATE RESTORED, WITH PAIRED HOMOLOGOUS CHROMOSOMES IS RESTORED.
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Created by:
ufuoma
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