biology paper Questions With Complete Solutions!!

what are chromosones made of? - ANSWERdna molecules where are chromosones located? - ANSWERthe nucleus of a cell how are the chromosones normally found in a body cell? - ANSWERchromosones normally come in pairs what is the cell cycle? - ANSWERthe series of stages by which cells divide what happens during the cell cycle? - ANSWERthe genetic material is doubled then splits into two separate cells what needs to happen before a cell can divide? - ANSWERit needs to grow and increase the number of subcellular structures eg ribosomes and mitochondria, and the dna needs to replicate to form two copies of each chromosone what occurs in mitosis? - ANSWERone set of chromosones is pulled to each side and the nucleus divides give the three stages of the cell cycle - ANSWER1) interphase- cell grows and organelles double 2)mitosis-one set of chromosones is pulled to each side and the nucleus divides 3)cytokinesis-cytoplasm and cell membrane split apart to form two identical cells what is cellular divison by mitosis important for? - ANSWERgrowth and development of multicellular organisms what is a stem cell? - ANSWERan undifferented cell of an organism what are stem cells capable of? - ANSWERgiving rise of many cells of the same type, other cells can arise from differentiation what can stem cells in human embryos be used for? - ANSWERthey can be cloned and made to differentiate into many types of different cells what can stem cells in human bone marrow be used for? - ANSWERcan form many different types of cells including blood cells what can meristem cells in plants be used for? - ANSWERcan differentiate into any different type of plant cell throughout the life of the plant, can produce clones of plants quickly and economically what will stem cell treatment possibly be able to help? - ANSWERpeople with diabetes or paralysis what occurs in therapeutic cloning? - ANSWERan embryo is produced with the same genes as the patient why is therapeutic cloning carried out? - ANSWERstem cells from the embryo are not rejected by the persons body, so they may be used for medical treatment what potential risks do the use of stem cells have? - ANSWERtransfer of viral infections