Bio 181 ASU (Bio181ASU)

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 prok...

The action potential is: correct answer: A result of the movement of ions The terminal web is a site of: correct answer: Exocytosis (T/F) Acetylcholine esterase breaks acetylcholine into muscarinic acid correct answer: False (T/F) The autonomic nervous system contains the sympathetic and the parasympathetic nervous system. correct answer: True (T/F) The axon hillock in the pre-synaptic neuron fires based on temporal and spatial summation of inputs. correct answer: True (T/F) ...

The stage of meiosis where 'crossing over' occurs. correct answer: Prophase 1 A mutation that you could pass on to your offspring would occur in the correct answer: Germ cells Most mutations that occur in our genomes are (neutral, beneficial, deleterious) correct answer: Neutral Which type of mutation would most likely have dramatic effects on the gene of interest? correct answer: Frameshift or Nonsense mutation What is the prob. of a child having same phenotype as first parent...

When the presynaptic cell contacts a muscle cell, the synapse area is called a motor end plate. correct answer: TRUE Briefly explain why the action potential flows only from the axon hillock to the terminal web. correct answer: During the course of an action potential there is a refractory period that makes sure the action potential can't trigger backwards by the use of caps on gated sodium channels. The caps close and keeps the action potential flowing in one direction. How do the glia...

The terminal web correct answer: is a site of exocytosis The central nervous system (CNS) contains correct answer: There is no correct answer Acetylcholine exocytosed from the presynaptic cell travels to the postsynaptic cell to start the action potential in the postsynaptic cell correct answer: True Potassium ions are at high concentrations inside of cells including in neurons correct answer: True The receptors in post-synaptic cells are the basis on which the synapse can be def...

The paramecium discussed in class contained an organelle called the contractile vacuole. This is the presumed precursor of the: correct answer: kidney A cell that is anchorage-dependent for growth will also exhibit contact inhibition. correct answer: true In your own multicellular body, cells with different functions have different DNA. correct answer: false, their DNA is identical but different gene expression The contractile vacuole of the paramecium is possibly an evolutionary pre...

Advantages of being multicellular correct answer: 1. labor distribution 2. longer lifespans Endosymbiotic Theory correct answer: theory that eukaryotic cells formed from a symbiosis among several different prokaryotic organisms Disadvantages of being multicellular correct answer: 1. need more food 2. if one organ fails the who organism can fail lack of biomolecular machines correct answer: limits a cell from becoming more complex Single-celled eukaryote organism correct answer: ...

Which protein influences the ability of RNA polymerase to transcribe genes? correct answer: Transcription factors Mitosis results in the formation of two genetically identical daughter cells. This is because correct answer: all the genetic material is duplicated then segregated equally to the daughter cells. Which of the following is an overgrowth of cells that serves no useful purpose? correct answer: Tumor Why must the life cycle of sexually reproducing species alternate between ha...

How many hydrogen bonds are there between an A and its paired nucleotide? correct answer: 2 T/F: The genetic code for the conversion of mRNA codons to proteins has redundancy correct answer: True List one type of post-translational modification correct answer: Proteolysis, Glycosylation, Phosphorylation. For DNA Polymerase III to work which of these components has to act first? correct answer: Primase Draw the sugar in DNA and label the carbons as discussed in the lecture. Then c...

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