You have observed a cell that has lamellipodia at both the lagging and leading edges. This cell could possibly have (select all that apply) Select one or more:
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A: Answer is . A gametophyte .
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A: As per batleby guidelines we have to answer only first : You may repost rest of the questions…
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A:
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A: Thank you for the question : Answer : Trachephytes are vascular plants. They have specialized water…
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Q: Mushroom is a reproductive structure that consists largely of dikaryotic cells. true or false
A: Mushroom is cap like structure in the fungus plants which may produce spores
Q: Fill in the table Types of collenchyma cells exhibited by the given plant specimens.
A: Collenchyma cells appear to be elongated with a non-uniform thickened cell wall. They have…
Q: Matre sporphyte ( es
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A: This structure is of Marchantia.
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A: Answer- The leading edge only
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- Researchers use a technique call RNA interference to knock down (i.e. not completely gone) the Bcl-2 gene in the amygdala of lab animals. What cellular response would you expect to occur? Question 1 options: A) An increase in apoptosis; many cells in the area would die B) An increase in axon regrowth after injury C) A decrease in cytochrome c levels released from the mitochondria D) A decrease in glial cell infiltration after injuryYou are studying actin in a newly discovered protist and determine that the Critical concentration (Cc) of the filament is 0.3pM at one end and 0.6µM at the other end. The lowest concentration of subunits that will allow the plus end to assemble is...The major function of the sodium-potassium pump is toa. pump Na+ into and K+ out of the cell.b. generate the resting membrane potential.c. maintain the concentration gradients of Na+ and K+ across theplasma membrane.d. oppose any tendency of the cell to undergo hyperpolarization.
- In order for the Golgi apparatus to release synthesized molecules to the outside of the cell (exocytosis), one would expect that the Golgi vesicle a) regulates the DNA. b) causes the translation of DNA into RNA, c) has specific membrane proteins that causes these vesicles to bind to specific binding molecules in the cell membranes. d) forms the chloroplasts membrane. e) binds the DNA to RNAThe decline of MPF activity at the end of mitosis is due to a. an increase in the cell's volume to genome ratio b. the destruction of the protein kinase Cdk c. decreased sythesis of cyclin d. The degradation of cyclinA researcher studying a line of cancer cells noticed that cellular content of RhoBTB3 and Cyclin E1 increase and decrease through the cell cycle. a. He hypothesizes that RhoBTB3 signaling regulates the production of Cyclin E1 and the entry of the cell into mitosis. Based on the data below, explain why his results do not support this hypothesis. Identify what conclusions are supported by this data. b. Suppose that the researcher can engineer a cell line in which RhoBTB3 expression can be induced by the addition of a drug. Design an experiment using this cell line to test whether RhoBTB3 regulates the production of Cyclin E1. Describe what results he can expect if his hypothesis is correct.
- What is the difference between cyclins and kinase proteins? A. Kinases regulates MPF dimer formation and cyclins phosphorylates the kinases in a negative feedback loop B. Cyclins regulate cell cycle, while kinases are enzymes that catalyze phosphorylation of cyclins C. Kinases are enzymes that convert MPF into CDK and the cyclins bind to CDK to send cells into M phase D. Cyclins are enzymes and kinase are proteins that regulate M phaseMalcolm Steinberg tested this hypothesis by putting two cell types in a Petri dish and watching how they sorted: a. how did the sorting pattern that supported cell adhesion being the force of cell sorting differ from that of "directed movement" (i.e., cells independently were directed to move inward --in that direction)? (can draw pattern or describe in words) b. He could have tested it another way--by inhibiting or knocking down cadherins (cell adhesion molecules) with a chemical or by using CRISPR/CAS9--if he did, what do you predict cells would do when placed in a Petri dish? (can draw this outcome or describe in words)What would most likely happen if the NLS signal sequence was removed from a protein that still contained a mitochondrial localization sequence and an SRP signal sequence? a) The protein would localize to the nucleus b) The protein would be retained in the ER c) The protein would localize to the mitochondria d) The protein would remain in the cytoplasm e) The protein would be secreted from the cell
- The cyclin/cyclin-dependent kinase pair that is active during the M phase of the cell cycle is a.Cyclin A/CDC2. b.Cyclin B/CDC2. c.Cyclin D/CDK4/6. d.Cyclin E/CDK2. e.Cyclin A/CDK2.Chemotaxis is a process by which cells migrate toward higher concentrations of a signaling molecule. The signaling molecule binds cell-surface receptors that result in actin polymerization at the cell membrane. Actin polymerization results in the formulation of filamentous actin that exerts a force and leads to protrusion of the leading edge. A researcher tested Compound A on chemotaxing cells and measured the relative amount of filamentous actin found in the cells at different times. Use the EGF Pathway passage to answer the questions. Part A Which of these structures, if present in a prokaryote, would prevent the organism from using this type of actin polymerization to chemotax toward a signal? A. cell wall B. flagellum C. mitochondrion D. ribosome Part B In the model proposed, which of these events MOST likely occurs to facilitate chemotaxis? A. Integrins anchor the cell to extracellular components. B. Motor proteins move actin toward the leading edge. C. Mitochondria migrate…Chemotaxis is a process by which cells migrate toward higher concentrations of a signaling molecule. The signaling molecule binds cell-surface receptors that result in actin polymerization at the cell membrane. Actin polymerization results in the formulation of filamentous actin that exerts a force and leads to protrusion of the leading edge. A researcher tested Compound A on chemotaxing cells and measured the relative amount of filamentous actin found in the cells at different times. Use the EGF Pathway passage to answer the questions. Part B In the model proposed, which of these events MOST likely occurs to facilitate chemotaxis? A. Integrins anchor the cell to extracellular components. B. Motor proteins move actin toward the leading edge. C. Mitochondria migrate away from the leading edge. D. Desmosomes anchor the cell to other cells. My answer to Part B is (b) motor proteins move actin toward the leading edge. But your answer is (d). Can you please explain why B…