All matter is made up of a limited number of substances called ________________.
ID: 300147 • Letter: A
Question
All matter is made up of a limited number of substances called ________________. A substance made up of two or more elements is called a(n) ________________. An element is made up of particles called ________________. A compound is made up of particles called ________________. Atoms that have gained or lost an electron are called ________________. The two kinds of particles that are in the nucleus of an atom are the ________________ and the ________________. A chemical bond always involves the outer of ________________ an atom. Match each of the following activities with one of phases of mitosis. Interphase Prophase Metaphase Anaphase Telophase Chromosomes move toward poles. ________________ DNA replicates. ________________ Chromosomes line up at the equator. ________________ Nuclear membrane breaks down and chromatids form. ________________ Cytoplasm begins to divide ________________. True or False- Correct all false statements without using "not". T or F DNA is found mainly in the cytoplasm of the cell. T or F The letters in DNA stand for ribonucleic acid. T or F The overall shape of a DNA molecule is a twisted ladder. T or F The sides of a DNA molecule are made of 4 kinds of bases.Explanation / Answer
II
51. Atom
52. Compound
53. Atom
54. two or more elements
55. ions
56. neutron and proton
57. electron
III
59. Anaphase
60. Interphase
61. Metaphase
62.Metaphase (disintegration of nuclear membrane actually occurs at the end of prophase and before the begining of metaphase called prometaphase)
63. Telophase
III
64. False. DNA is found in the nucleus of the cell.
65. False. Letters in DNA stands for deoxynucleic acid, composed of 4 nitrogenous bases called adenine(A), guanine(B), cytosine (C) and thymine (T)
66. True. The X-ray crystallography model of DNA (by Watson and Crick) suggested the double helical and twisted ladder structure.
67. False. The sides of the DNA molecule are made up of alternating deoxyribose sugar and phosphate molecules. The 4 nitrogenous bases called adenine(A), guanine(B), cytosine (C) and thymine (T) forms the rungs of the DNA ladder.
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