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Week 7 - Tom Marler Biology 108 Worksheet 7 1 Define...

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Tom Marler Biology 108 Worksheet 7 September 24, 2009 1. Define DNA. ________(1)__________ (1) DNA is the genetic material which is largely found in the chromosomes, located in the nucleus of a cell. This is produced from covalent bonding of nucleotide monomers that contain the sugar deoxyribose; the genetic material for all organism. 2. The shape of DNA is a _____(2)______ (2) Double helix which is composed of two strands that spiral about each other. Each stand is a polynucleotide because it is composed of a series of nucleotides. 3. The subunits/components of DNA are _________(3)____________ (3) Double helix composed of two polynucleotide strands each nucleotide is composed of a deoxyribose sugar, a phosphate, and a nitrogen-containing base (A,T,C,G). The base A is bonded to T, and G is bonded to C. 4. What are the complementary base pairs in DNA? ________(4)________ (4) Hydrogen bonding between particular bases in DNA thymine (T) pairs with adenine (A), and guanine (G) pairs with cystosine (C) or vice versa. 5. What is meant by “DNA replication is semi-conservative”? _______(5)______ (5) Each new double heliex has one original strand and one new strand. One original strand is conserved or present in each new double helix. Each original strand has
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