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Name Per

DATE DUE: Thursday December 1, 2011

For each of the following sequences, fill in either the DNA, the mRNA sequence, the rRNA anticodons, or the amino acid sequences that have been left blank. If several sequences might work choose any one. 1. DNA mRNA tRNA AA

A U G A C U A G C U G G G G G U A U U A C U U U

___

U A G

___ ___

2.

DNA mRNA tRNA AA

T A C

C G C

T C C

G C C

G T C

G A C

A A T

A C C

A C T

_ _ _

3. DNA mRNA tRNA AA

U A C C A C C C C C G U A U G G C U G G G A A U

__ __

A U C

__

4. DNA mRNA tRNA AA

MET ARG GLY PHE PHE MET VAL GLY (STOP)

5. DNA mRNA tRNA AA

T A C U G U C U C ALA

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A T G G A U U U G PRO A U U

Mr. Gracias

6. What are the three differences between RNA and DNA?

7. Where is DNA found in the cell? the cell? 8. Name the three types of RNA and what they do.

Where is RNA found in

9. Draw an mRNA strand that is complementary to the DNA strand AATTGC. Circle a nucleotide.

10. What are the steps of transcription?

Mr. Gracias

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Mr. Gracias

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Across 2. the two sides of DNA held together by weak ____ bonds 5. always pairs with cytosine 6. where protein is assembled from the message on the RNA 7. the shape of DNA, double ____ 9. process of copying DNA 13. composed of a sugar, a base, and a phosphate 14. sections of DNA that code for a trait 15. replaces thymine in RNA

Down 1. carries the message of DNA to ribosomes 3. the long form of DNA, ____ acid 4. the sugar found in DNA 8. DNA's stucture established by Watson and _____ 10. the sides of the DNA ladder composed of sugar and _____ 11. always pairs with thymine 12. where DNA is found in the cell

Mr. Gracias

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How Does DNA Determine the Traits of an Organism? Introduction: In this simulation, you will examine the DNA sequence of a fictitious organism - the Snork. Snorks were discovered on the planet Dee Enae in a distant solar system. Snorks only have one chromosome with eight genes on it. Your job is to analyze the genes of its DNA and determine what traits the organism has and then sketch the organism (You can be creative here). For simplicity, the gene sequences are much smaller than -real- gene sequences found in living organisms. Each gene has two versions that result in a different trait being expressed in the snort. Genes Gene 1 - body covering Amino Acid Sequence val - ser - leu val - ser - lys Gene 2 - body style tyr - pro - glu - glu - lys val - pro - thr - glu - lys Gene 3 - legs leu - leu - leu - pro leu - leu - ser - ala Gene 4 - head shape ala - val - val val - ala - ala Gene 5 - tails his - iso his - his Gene 6 - body pigment ser - pro - val val - phe - tyr Gene 7 - eyes Description hairless hairy plump skinny 3 legged 2 legged round head square head tail no tail blue pigment (hair/skin) red pigment (hair/skin)

asp - iso - leu - leu - pro small slanted eyes - thre asp - iso - pro - pro - pro large round eyes - thre

Gene 8 - mouth

val - asp - asp - ala asp - asp - asp - ala

circular mouth rectangular mouth pointed standing-up ears rounded floppy ears long spaghetti like arms short stumpy arms

Gene 9 - ears

phe - ser - gly phe - phe - gly

Gene 10 - arms

arg - tyr - cys - lys arg - arg - asp - thre

Mr. Gracias

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Each of the following DNA samples was taken from volunteer snorks. Your job is to analyze each DNA sample and determine the phenotype (how the organism looks) based on the sequence. Remember that AUG is a start codon, and it signifies the beginning of each gene. UAA is a stop codon and signifies the end of a gene. The genes are in order from gene 1 to gene 9. Snicker Snork AUG | GUC AGC AAA | UAC CCC CAA CAG AAA | CUC UUA AGU GCG |GCU GUU GUG | CAU CAU | GUU UUU UAC | AAU AUC UUA CUG CCC ACC | AAU AAC AAU GCC | UUU UCU CAC | UAA

Snuffle Snork AUG |GUA UCU AAA | GUU CCU ACU CCA AAG | CUU CUC CUC CCC | GUU GCG GCU | CAU CAC |GUA UUU UAU | AAU AUU CUU CUG CCC ACA | AAU AAU AAU GCA | UUC UCG CAC | UAA

Mr. Gracias

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Snapple Snork AUG | GUC AGC AAA | UAC CCC CAA CAG AAA | CUC UUA AGU GCG | GUU GCG GCU | CAC AUU | UCU CCC GUA | AAU AUU CUC CUC CCC ACC | GUU AAU AAU GCA | UUC UUU CAU | UAA

Snoopy Snork AUG | GUA UCC CUC | UAC CCC CAA CAG AAA | UUA UUC CUG CCC | GUG GCA GCU | CAU AUU | UCU CCC GUA | AAC AUU CUU CUG CCC ACA | AAU AAC AAU GCC | UUU UCU CAC | UAA

Mr. Gracias

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Microsoft Word - transcription-translation.doc