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Review Questions
Essentials of Radiation Biology and Protection 2nd Edition Chapter 2
Question | Answer |
---|---|
Possessing two sets of chromosomes | Diploid |
The halves into which the chromosome is longitudinally divided, which are held together by the centromere and move to opposite poles of a dividing cell during anaphase | Chromatid |
The first stage of mitosis or meiosis when chromosomes become visible | Prophase |
The gap or growth period following the replication of DNA and prior to mitosis | G2 |
A complex organic protein that accelerates chemical reactions | Enzyme |
Any living entity | Organism |
Cell devision of germ cells, which consists of two cell divisions but only one replication of DNA | Meiosis |
The stage of mitosis where chromosomes are arranged | Metaphase |
RNA that binds amino acids to ribosomes during protein synthesis | Transfer RNA |
The distructive phase of metabolism, in which complex substances are changed into simpler substances | Catabolism |
Nucleic acid that controls protein synthesis | Ribonucleic Acid |
The period between cell division, known as the resting stage, when DNA is being synthesized | Interphase |
A two-layered membrane that surrounds the cell nucleus | Nuclear Membrane |
The basic unit of heredity that has a specific location on chromosome | Gene |
The linear thread of a cell nucleus | Chromosome |
Period of synthesis or replication | S-Phase |
A stage in mitosis and meiosis between metaphase and telophase ni which chromatids migrate toward opposite poles of the cell | Anaphase |
The construction phase of metabolism, when a cell takes the substances from blood that are necassary for repair and growth and converts them into cytoplasm | Anabolism |
Any chromosome that is other than the sex chromosome | Autosome |
The constricted area of the chromosome that separates the chromosome into two arms | Centromere |
A material in the nucleus that contains genetic information | Chromatin |
A polymer composed of deoxyribonucleotides arranged in a double helix | Deoxyribonucleic Acid(DNA) |
A chromosome mutation in which either one or both segments of a chromosome join to another chromosome | Duplication |
The gap or growth period following the replication of DNA and prior to mitosis | G1 |
The mature male or female reporductive cell | Gamete |
Having half the diploid number of chromosomes found in somatic cells | Haploid |
A large molecule | Macromolecule |
RNA that carries amino acids to ribosomes for assisting in protein synthesis | Messanger RNA |
Type of cell division involving somatic cells in which a parent cell divides to create tow daughter cells that contain the same chromosome number and DNA content as the parent | Mitosis |
Spherical body in the cell nucleus that holds nuclear RNA | Nucleolus |
A molecule created by combining two or more of teh same molecules | Polymer |
A colloidal structure of organic and inorganic materials and water that form the living cell | Protoplasm |
RNA that exists in ribosomes and assists in protein synthesis | Ribosomal RNA |
The final of mitosis or meiosis, during which there is reconstruction of the nuclear membrane and cell cytoplasm | Telophase |
Two or more tissues combined to perform a specific function: | Organs |
Assist in growth, construct new tissues, and repair injured or worn-out cells: | Proteins |
The location of genetic information is in the: | Nucleus |
Which RNA nucleotide base pairs with adenine in DNA synthesis? | Guanine |
The normal diploid or 2n number is humans: | 46 |
In which phase of mitosis do the chromosomes line up at the equator of the cell? | Metaphse |
During meiosis, or reduction division: | The cell divides twice in succession, but the chromosomes are duplicated only one time |