Download ASU Bio 181 Exam 1 Questions And Answers Latest Update and more Exams Biology in PDF only on Docsity!
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The association of ribosomes with _____ invaginations would support the _____ theory. - - - correct answer ✅membrane, endomembrane After a cell is pancake shaped in a cell culture dish, the order of events that occurs as a cell walks is? - - - correct answer ✅filapodia, lamellipodia, cell muscle, retraction fiber T/F It is presumed that the peroxisomes evolved in these primitive, proto-eukaryotes to remove oxygen, which was toxic to the primitive cells. - - - correct answer ✅true T/F In an extant prokaryotic cell the outer boundary of life is the capsule. - - - correct answer ✅false T/F When cancer cells are crowded by surrounding cells, the cancer cells become spherical and they can still go through cell division. - -
correct answer ✅true
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T/F Loss of the cell wall was required for the endomembrane system theory. - - - correct answer ✅true T/F Fluorescence microscopy is form of light microscopy - - - correct answer ✅true T/F Loss of the cell wall is required for the endosymbiotic theory. - -
correct answer ✅true T/F TEM provides a thin, two-dimensional section of the object being studied. - - - correct answer ✅true T/F The sytoskeleton enabled the primitive cell to become motile. -
correct answer ✅true T/F the ancient earth did not contain much oxygen - - - correct answer ✅true
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T./F the end of the retraction fiber touching the cell culture plate still contains the cell equivalent of super glue. - - - correct answer ✅true T/F the presumed first step in the transition of the primitive, proto- prokaryotic cell into the primitive, proto-eukaryotic cell was the loss of the cell wall. - - - correct answer ✅true 1n order to examine cells which are smaller than can be detected by the human senses what needs to be used? - - - correct answer ✅technology A cell that is itself an organism must have a minimum of four needs presented in lecture - - - correct answer ✅find food, find shelter, find mate, and reproduce. compared to bacteria which of the cell types below are not responsible for finding food? - - - correct answer ✅lymphocyte, macrophage, and fibroblast
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T/F In your own mulitcellular body, different cells in your body have a division of labor between them. - - - correct answer ✅true T/F The paramecium swims by way of using a flagella - - - correct answer ✅false T/F A normal cell is anchorage-dependent for growth and mortal - -
correct answer ✅true what limits the paramecium from acquiring more complex functions? - - - correct answer ✅cannot fit anymore biomachinery into its space comparing a singled cell eukaryotic organism with a multicellular organism such as yourself identify the major difference from the list below. - - - correct answer ✅division of labor in the cell biology what can limit the progress of science - - - correct answer ✅technology
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the paramecium discussed in class contained an organelle the contractile vacuole. this is the presumed precursor of the: - - - correct answer ✅kidney T/F in your own multicellular body, cell with functions have different DNA. - - - correct answer ✅False T/F A cancer cell will be anchorage-dependent for growth and immortal - - - correct answer ✅false if something is soluble in water a of hydration forms around it and it is termed. - - - correct answer ✅hydrophilic 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 - - - correct answer ✅false
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facilitated diffusion uses a channel to let components move down their concentration gradient. - - - correct answer ✅true T/F a single pass trans-membrane protein that is an alpha helix can make a channel. - - - correct answer ✅false when a vesicle fuses with the plasma membrane the contents of the lumen of the vesicle are - - - correct answer ✅ligands that are used in cell communication T/F the ER is contiguous with the golgi apparatus - - - correct answer ✅false amino acids can be largely subdivided into groups. what are the two groups - - - correct answer ✅hydrophobic and hydrophlic what are the orphaned organelles orphaned from? - - - correct answer ✅they are mitochrondria and chloroplast and they orphaned from the endomembrane system
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T/F the ER is contiguous with the nuclear envelope - - - correct answer ✅true what are the functions of a membrane? - - - correct answer ✅cell protection and controlling cell movement T/F its a simple matter (ie thermodynamically) for vesicle to form from the endoplasmic reticulum. - - - correct answer ✅false is cholesterol good or bad to have in biological membranes - - - correct answer ✅good the plasma membrane gets new lipids from - - - correct answer ✅none of the above consider the geography of cells. Actin filaments are present in the cell's ____ and the microtubules are present in the cell's - - - correct answer ✅cortex
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T/F chromosomes are made out of Euchromatin - - - correct answer ✅false Where is the histone H1 found? - - - correct answer ✅they are found in eukaryotic cell nuclei T/F the diameter of an intermediate filament is 25 nm. - - - correct answer ✅false T/F the actin filament system is present in the nucleus - - - correct answer ✅false T/F to get into the nucleus a component has to have the correct signal sequence and pass through a nuclear pore. - - - correct answer ✅True which cytoskeleton filament system lines the inside of the nucleus to protect it? - - - correct answer ✅microtublues
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T/F heterochromatin does not exist in interphase nuclei - - - correct answer ✅false T/F many chemotherapy drugs act by arresting the cell in m phase of the cell cycle. - - - correct answer ✅true T/F gap 1 of the cell cycle represents the time when the cell is doing what its suppose to do as part of its cell type. in other words, that is when a liver cell is doing it function as a liver cell. - - - correct answer ✅true list the three categories of cells in the body with regard to the cell cycle: - - - correct answer ✅1) cells that never go through the cell cycle again once you're born (neurons, muscles)
- cells that can be induced to go through the cell cycle by injury (liver)
- cells that are constantly going through the cell cycle. (skin, blood cells, intestine/enterocytes)
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T/F cytoplasmic signal transduction controls the checkpoints of the cell cycle. - - - correct answer ✅true T/F in your body not all cells go through the cell cycle - - - correct answer ✅true T/F at these checkpoints a cyclin works with a cyclin-dependent kinase (i.e cdk) to regulate the checkpoint. - - - correct answer ✅true T/F cancer can be described as a loss of cell cycle regulation. - - - correct answer ✅true the activation of both MPF and MAPK results in _______ _______ (two words) of the cytoplasm during M-phase. - - - correct answer ✅setting down T/F the synthesis/presence of cyclin is what turns on the Cdk as the Cdk is always present but it is the cyclin that is synthesized and degarded in cycles. - - - correct answer ✅true
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chromosomes 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. - - - correct answer ✅true 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 - - - correct answer ✅paracrine there are two basic forms of cytoplasmic signaling (ie signal transduction) one uses ____ and the other uses ______. - - - correct answer ✅protien kinases calcium signal 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 - - - correct answer ✅endocrine
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when a cell talks to itself it is called and communication ______ cells - - - correct answer ✅within two types of second messengers discussed in lecture can exist downstream of plasma membrane receptor. these are _______ and _______. - - - correct answer ✅cyclic AMP and MAP kinase there are two types of receptors, one type of receptor binds to bipolar (hydrophilic) ligands and this is the receptor located in the _______ ________ - - - correct answer ✅plasma membrane the other point where MAPK can become active is ______of the cell cycle - - - correct answer ✅m phase 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 ______ _______. - - - correct answer ✅cell cycle
