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... 1. Characteristics of a cell depend on which genes are expressed within it 2. Tissue-specific gene expression vs. house-keeping genes (picture only 20.14) 3. Genes are regulated in a variety of ways (18.6) 4. Genes can be regulated by turning on/off transcription a. Epigenetic factors regulate chrom ...
No Slide Title
No Slide Title

... conditions, DNA can be taken up by host cell by transformation. ...
16.6 * Locating and Sequencing Genes
16.6 * Locating and Sequencing Genes

... template, countless nucleotides, and a good supply of the specific terminator nucleotide. Due to this, you get a variety of ‘partially completed’ DNA strands, because they have been ‘terminated’ at different points. ...
Genetics and Heredity
Genetics and Heredity

... of DNA is a sugar-phosphate bond. It provides support for the “steps” or base pairs.  The base pairs or “Steps” are made up of four nitrogen ...
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Mutations and Genetics Test Review 1. What percentage of human

... Mutations and Genetics Test Review 1. What percentage of human sperm cells carry an X chromosome? a. ...
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Essential Question

... Essential Question What is DNA made of and how ...
pdf version
pdf version

... Cyril Ribeyre and David Shore, from the Department of Molecular biology of the UNIGE, have discovered that Rif1 and Rif2, two related proteins that bind telomeres, deactivate the alarm of the DNA repair surveillance system. ʻTelomeres interact with many molecules. We had identified several biochemic ...
Biology Common Assessment Name
Biology Common Assessment Name

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11-03-11 st bio3 notes

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DNA, RNA, and Protein
DNA, RNA, and Protein

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code sequence practice

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Chapter 12 Test Review
Chapter 12 Test Review

... Watson and Crick – _________________________________________________________________ 2. Chargaff’s rules state that in DNA, the amount of adenine (A) equals the amount of ______________ 3. Because of base pairing in DNA, the percentage of _______ = _______ & ________ = _________ 4. What is the polym ...
Biotechnological Tools and Techniques
Biotechnological Tools and Techniques

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Student Worksheet

... structural proteins) and three-dimensional structure of chromosomes. Individually, or with a partner, use your textbook if necessary, to: 1. Indicate where you would find the following: a. Condensed chromatin b. Decondensed chromatin c. Hydrogen bonds d. Phosphodiester bond e. Nucleotide 2. List the ...
Transformation and Cloning
Transformation and Cloning

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Study Guide 3 Bio 4 C

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How is DNA packed in the nucleus?

... chemical nucleotide bases (A, C, T, and G). The average gene consists of 3000 bases, but sizes vary greatly, with the largest known human gene being dystrophin at 2.4 million bases. ...
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A8xb1e3x8x1 (2)

... Write a random DNA sequence on a long strip of paper to represent an organism’s genome Have your partner write a short DNA sequence on a short strip of paper to represent a marker gene Using the chart provided, work with your partner to figure out how to insert the marker gene into the genome ...
Unit 10 Biotechnology review guide 2014
Unit 10 Biotechnology review guide 2014

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Microbial Genetics - DrMinkovskyScienceWiki
Microbial Genetics - DrMinkovskyScienceWiki

... • Addition or deletion of 1 or 2 bases knocks the sequence out of frame • The whole amino acid sequence changes, usually results in a truncated (shortened) protein • If the gene is essential, the mutation is lethal. • Insertions or deletions in multiples of three may be tolerated • These are back in ...
15.2_Recombinant_DNA
15.2_Recombinant_DNA

... Write a random DNA sequence on a long strip of paper to represent an organism’s genome Have your partner write a short DNA sequence on a short strip of paper to represent a marker gene Using the chart provided, work with your partner to figure out how to insert the marker gene into the genome ...
Chapter Objectives: Chapter 20 Biotechnology
Chapter Objectives: Chapter 20 Biotechnology

... 3. Describe how restriction enzymes and gel electrophoresis are used to isolate DNA fragments 4. Explain how the creation of sticky ends by restriction enzymes is useful in producing a recombinant DNA molecule 5. Outline the procedures for producing plasmid and phage vectors 6. Explain how vectors a ...
File - Ms. Wilson`s Biology Class
File - Ms. Wilson`s Biology Class

... Read the text below and answer the following questions: 1. In order to speed up the copying process (replication), DNA replication begins at ___________ locations along each chromosome. 2. The two DNA strands are pulled apart and copied in both directions at the rate of about _________ nucleotides p ...
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DNA supercoil



DNA supercoiling refers to the over- or under-winding of a DNA strand, and is an expression of the strain on that strand. Supercoiling is important in a number of biological processes, such as compacting DNA. Additionally, certain enzymes such as topoisomerases are able to change DNA topology to facilitate functions such as DNA replication or transcription. Mathematical expressions are used to describe supercoiling by comparing different coiled states to relaxed B-form DNA.As a general rule, the DNA of most organisms is negatively supercoiled.
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