ASU Bio 181 Exam 1 Questions And Answers With Verified Solutions

1n order to examine cells which are smaller than can be detected by the human senses what needs to be used ? - technology A cell that is itself an organism must have a minimum of four needs presented in lecture - find food, find shelter, find mate, and reproduce. A normal cell is _____ and ____ for growth. - mortal, anchorage dependent a singled celled eukaryotic organism - has a limited number of biomolecular machines must find food, shelter, a mate and reproduce escape from predators After a cell is pancake shaped in a cell culture dish, the order of events that occurs as a cell walks is? - filapodia, lamellipodia, cell muscle, retraction fiber amino acids can be largely subdivided into groups. what are the two groups - hydrophobic and hydrophlic an important checkpoint regular is at Gap2/M-phase transition. here cyclin B and Cdk1 activate and form MPF which becomes a ____ _____ ( two words) and causes the DNA to condense into _______. - histone kinase chromosomes compared to bacteria which of the cell types below are not responsible for finding food? - lymphocyte, macrophage, and fibroblast comparing a singled cell eukaryotic organism with a multicellular organism such as yourself identify the major difference from the list below. - division of laborconsider the geography of cells. Actin filaments are present in the cell's ____ and the microtubules are present in the cell's - cortex cytokinesis in plant and animal cells takes two forms - animal: contarctile ring formation plant: phragmoplast formation explain what limits an individual cell from becoming more complex - individual cell have a limit number of biomolecular machines. In a multicellular organism you get a division of labor between different cell types so that the whole can do more than the sum of the parts with similar number of biomolecular machines per cell. facilitated diffusion uses a channel to let components move down their concentration gradient. - true for a cell to respond to a ligand relased from a cell and uses the circulatory system to get to the responding cell it is called ______ communication - endocrine for a cell to respond to a ligands release from a neighboring cell where the ligand diffuses directly from one cell to another is called ______ communication - paracrine for protein to enter the endoplasmic reticulum as part of the endoplasmic reticulum's lumen or part of the endoplasmic reticulum membrane: - a ribosome binds to the mRNA and a short stretch of protein is synthesized that contains a signal sequence. if something is soluble in water a of hydration forms around it and it is termed. - hydrophilic in the cell biology what can limit the progress of science - technology is cholesterol good or bad to have in biological membranes - good list the three categories of cells in the body with regard to the cell cycle: - 1) cells that never go through the cell cycle again once you're born (neurons, muscles)2) cells that can be induced to go through the cell cycle by injury (liver) 3) cells that are constantly going through the cell cycle. (skin, blood cells, intestine/enterocytes) MAPK has two different functions depending on where this kinase acts in the _____ _____. if kinase becomes active during interphase the cell is triggered to progress through the ______ _______. - cell cycle cell cycle T./F the end of the retraction fiber touching the cell culture plate still contains the cell equivalent of super glue. - true T/F A cancer cell will be anchorage-dependent for growth and immortal - false T/F a cell that is anchorage-dependent for growth will also exhibit contact inhibiton. - true T/F A normal cell is anchorage-dependent for growth and mortal - true T/F a single pass trans-membrane protein that is an alpha helix can make a channel. - false T/F active transport uses ATP to move components in parallel with their concentration gradient, that is: from a high concentration to a low concentartion - false T/F after DNA systhesis (ie S-phase) an identical copy of the DNA has been made and this is present in the two chromatids when viewed as the chromosome. - true T/F at these checkpoints a cyclin works with a cyclin-dependent kinase (i.e cdk) to regulate the checkpoint. - true T/F cancer can be described as a loss of cell cycle regulation. - trueT/F chromosomes are made out of Euchromatin - false T/F cilia and microvilli contain a similar number of parallel actin filaments - false