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DNA Review Sheet Answers

This review sheet provides answers to questions about DNA, including its structure, replication, and the process of protein synthesis. It also covers the differences between DNA and RNA, and the steps of transcription and translation.

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DNA Review Sheet Answers

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  1. DNA Review Sheet Answers • Determines an organism’s traits; molecule of heredity • Hershey and Chase • Made of nucleotides • Adenine Thymine Cytosine Guanine • A-T C-G • Drawing Of DNA • Watson and Crick • Omit

  2. DNA Review Sheet Answers 9. Double helix 10. 1. separation of strands 2. add nucleotide 3. bond with new nucleotides 4. end with 2 double helixes 11. Different sequences with same nitrogren bases

  3. DNA Structure Model Choose 6 different colors. One color for adenine, one color for thymine, one color for cytosine, one color for guanine, one color for sugar, and one color for phosphate. Color all A’s the same, color all T’s same, color all C’s same, Color all G’s same, color all sugars/squares same, and color all blocks behind sugar same color. COLOR BEFORE CUTTING !!!!! CUT out the bases individually should have total of 8 Cut out DNA structures paste on construction paper and then paste nitrogen bases. A-T G-C Cut out 1st paragraph on worksheet from the word “The” to “message” Also cut out title “Structure of DNA” paste

  4. From DNA to Proteins 11.2 Notes

  5. The information on DNA codes to make Proteins

  6. A G U C U G RNA: Ribonucleic Acid • 4 Nitrogen Bases • Cytosine C • Guanine G • Adenine A • Uracil U • Is a nucleic acid • Single stranded • Sugar is ribose

  7. RNA (cont) • 3 Types of RNA: • Messenger RNA (mRNA): brings instructions from DNA to cytoplasm • Ribosomal RNA (rRNA): binds to the mRNA and uses the instructions to assemble amino acids. • Transfer RNA (tRNA): delivers amino acids to the ribosome.

  8. Overall Process to Make Proteins DNA RNA Transcription RNA Protein Translation

  9. Transcription • Making a copy of RNA from DNA • Steps: • DNA unwinds • RNA matches up to DNA • A single strand of RNA is made • DNA coils up

  10. Transcription • How RNA matches to DNA DNA Strand: A T C G RNA Strand: U A G C

  11. RNA Processing • Cleaning up the RNA strand • Not all parts of DNA code for proteins. • Intron—does not code for protein • Exon—does code for protein • Introns are removed before moving on to next step

  12. The Genetic Code • Proteins are made of amino acids • There are 20 amino acids • 3 nitrogen bases code for one amino acid—called a codon • There are 64 possible codons • All organisms use the same codons

  13. Translation • Making an amino acid from mRNA • Takes place in ribosome • Steps: • mRNA attaches to ribosome • tRNA with amino acid binds to mRNA • tRNA releases amino acid • Next tRNA binds to mRNA

  14. 5. Peptide bond forms between amino acid 6. tRNA releases its amino acid 7. Steps are repeated until stop codon is reached. A chain of amino acids becomes a protein when correct shape is formed.

  15. Starter: March 5, 2010: Copy all of the following, answering any questions 2.01a: Replication: Question 1: Describe the process of DNA Replication. 2.01b: Protein Synthesis: Question 2: List three differences between DNA and RNA. Question 3: Describe the process of transcription and where it happens.

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