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Learning objectives
Learning objectives

... 2. How did Avery’s experiment identify DNA as the transforming factor? (Page 340) 3. How did Hershey and Chase’s experiment with T4 bacteriophages confirm that DNA not proteins was the transforming factor? (Page 341) The Role of DNA (12.1) 1. Describe (use figure 12-4) and explain the role of DNA. ( ...
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... lagging strand to allow the forming of pieces of synthesized DNA called Okazaki Fragments (after Reija Okazaki who discovered them) DNA polymerase I or Rnase H removes the RNA primers (from both the strands) and replaces them with the appropriate nucleotides. DNA ligase joins the Okazaki fragments t ...
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CHROMOSOME FUSION

... called “tandem repeats.” In order to clarify this pattern, we can insert a break between each set (although, in reality, there are no breaks), so strand 1 would look like this: ttaggg ttaggg ttaggg ttaggg ttaggg ttaggg ttaggg This particular series of tandem repeats (of these six bases, usually repe ...
Document
Document

... 2. ______ coil and become condensed 3. Along the middle of the cell, called the _____, sister ________start to align. 4. When mitosis ends, _______ begins so cytoplasm can pinch in half to make new cells called ________. 5. Mitosis allows chromosomes to ________ and divide on their own. ...
MS Word File
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Name: Date: Period:___ Midterm Review: Study Guide # 3 TOPICS

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... 45. The maximum frequency of recombination between linked loci is which of the following (values are percentages)? a. 10 b. 25 c. 50 d. 100 46. You are a plant breeder interested in developing a high yielding, disease resistant variety. You observe that in the 100 doubled haploid progeny derived fro ...
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Lecture #17 – 10/12/01 – Dr. Wormington
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a higher level of chromatin structure.
a higher level of chromatin structure.

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Quiz #6 - San Diego Mesa College
Quiz #6 - San Diego Mesa College

... C) any of the above Q. 7: The short RNA pieces the DNA polymerase needs to successfully start DNA replication, are called: A) plasmids B) primers C) Okazaki fragments D) tRNA E) rRNA Q. 8: A change of the genetic information of the DNA molecule due to a variation of the nucleotide sequence is called ...
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Telomere



A telomere is a region of repetitive nucleotide sequences at each end of a chromatid, which protects the end of the chromosome from deterioration or from fusion with neighboring chromosomes. Its name is derived from the Greek nouns telos (τέλος) 'end' and merοs (μέρος, root: μερ-) 'part.' For vertebrates, the sequence of nucleotides in telomeres is TTAGGG. This sequence of TTAGGG is repeated approximately 2,500 times in humans. During chromosome replication, the enzymes that duplicate DNA cannot continue their duplication all the way to the end of a chromosome, so in each duplication the end of the chromosome is shortened (this is because the synthesis of Okazaki fragments requires RNA primers attaching ahead on the lagging strand). The telomeres are disposable buffers at the ends of chromosomes which are truncated during cell division; their presence protects the genes before them on the chromosome from being truncated instead.Over time, due to each cell division, the telomere ends become shorter. They are replenished by an enzyme, telomerase reverse transcriptase.
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