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30 Cards in this Set
- Front
- Back
An RNA molecule consists of how many strands of nucleotides?
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one
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A DNA molecule consists of how many stands of nucleotides?
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two
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What are the uprights on the spiral ladder?
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nucleoties
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The sequence of N-Bases form _________ of ladder: Genetic Code.
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rungs
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Genetic code for one protein?
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Gene
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A double strand (helix) of nucleotides that is the genetic code in the chromomes of cells ?
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DNA
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A gene is the sequence of bases that is the code for one protein?
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DNA
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A single strand of nucleoties formed as a complementary copy of a gene in the DNA is?
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mRNA (messenger RNA)
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Contains the triplet code: three bases is the code for one amino acid ?
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mRNA (messenger RNA)
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__________ leaves the DNA in the nucleus, enters the cytoplasm of the cell, and becomes attached to ribosomes.
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mRNA (messenger RNA)
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The cell organelles that are the site of protein synthesis?
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Ribosomes
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___________ attach the mRNA molecule.
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Ribosomes
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___________ contain enzymes to form peptides bonds between the amino acids.
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Ribosomes
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_____________________ picks up amino acids (from food) in the cytoplasm and transports them to their proper sites(triplets) along the mRNA molecule.
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tRNA (transfer RNA)
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A protein is made of the smaller molecules called ___________.
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amino acids
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Two identical cells are produced in the process in what cell division?
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Mitosis
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One cell with the diploid (the usual # 46)number of chromosomes divides ONCE?
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Mitosis
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Four cells are produced in the process in what cell division?
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Meiosis
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One cell with the diploid (usual # 46)number of chromosomes divides twice?
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Meiosis
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Each cell produced has the haploid (usual # 46) number of chromosomes?
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Meiosis
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The cells produced are egg or sperm cells?
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Meiosis
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The cells produced are needed for the growth and repair of tissues?
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Mitosis
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Each cell produced has the diploid(usual # 46) number of chromosomes?
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Meiosis
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Genetic disease - a mistake in the ___________ code.
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DNA
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Uncontrolled cell division means __________ cell division.
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Abnormal
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Haploid number means:
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Half the usual number (23)
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In abnormal cell division, _______ does not when when contact is made to normal cells.
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Mitosis
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Mutation means:
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Genetic change, causes malignant cell.
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Environmental substances that cause mutations are called:
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Carcinogens; cigarette smoke, ultraviolet light, certain viruses.
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__________________ is a hereditary disorder, one that may be passed from generation to generation.
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A genetic disease
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