Chapter 12 DNA and RNA #21 Base Pairing Rules DNA Double Helix Single Stranded RNA.

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Presentation transcript:

Chapter 12 DNA and RNA #21 Base Pairing Rules DNA Double Helix Single Stranded RNA

5b. Know Base-pairing rules for DNA replication. Know transcription of information from DNA into mRNA.

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Double Stranded Helix DNA AGCTTAA TCGAATT What are the complements of the following single DNA strands? TCGAATT

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1. (Genetics 5B) During DNA Replication, a DNA strand that has the base sequence of AGCTTG produces the following complementary strand? C. TCGACAD TCGAAC A. GATCCAB. UCGAAC DNA Strand AGCTTG Complementary DNA Strand TCGAAC

2. (Genetics 5B) During mRNA transcription, a portion of a DNA strand that has the bases AGCTTG produces a messenger RNA transcript that has the following sequence of bases. A. TCGACAB. UCGCCA C. GATCCAD. UCGAAC DNA Strand AGCTTG mRNA Strand UCGAAC

3. (DNA&RNA 5b) What is produced during transcription? A. RNA molecules B. DNA molecules C. RNA polymerase D.proteins During transcription, RNA polymerase binds to DNA and separates the DNA strand. RNA polymerase then uses one strand of DNA as a template from which nucleotides are assembled into a strand of mRNA.

4. (DNA&RNA 5b) How many nucleotide make up a codon? A. 6 B. 2 C. 3 D. 1

5. (Genetics 5B) Because of base pairing in DNA, the percentage of? A. Adenine molecules is equal to cytosine B. Thymine molecules is equal to cytosine C. Guanine molecules is equal to cytosine D. Uracil molecules is equal to cytosine

6. (DNA&RNA 5b) The copy made of a portion of DNA in the nucleus is called_____? A. tRNA B. mRNA C. rRNA D. polymerase

7. (DNA&RNA 5b) In addition to the start and stop codons, how many codons are need for 4 more amino acids? A. 6 B. 2 C. 4 D. 3