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BSC 1010 FINAL EXAM REVIEW QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED LATEST UPDATE
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BSC 1010 FINAL EXAM REVIEW QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED LATEST UPDATE Put the steps of the process of signal transduction in the order they occur: 1. A conformational change in the signal-receptor complex activates an enzyme. 2. Protein kinases are activated. 3. A si...

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  • September 22, 2024
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  • 2024/2025
  • Exam (elaborations)
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BSC 1010 FINAL EXAM REVIEW QUESTIONS AND

ANSWERS WITH COMPLETE SOLUTIONS VERIFIED

LATEST UPDATE


Put the steps of the process of signal transduction in the order they occur:

1. A conformational change in the signal-receptor complex activates an enzyme.

2. Protein kinases are activated.

3. A signal molecule binds to a receptor.

4. Target proteins are phosphorylated.

5. Second messenger molecules are released.


3,1,5,2,4


Integrins are integral membrane proteins. They are often attached to _____.


cytoskeletal proteins and proteins in the extracellular matrix


Phosphorylation cascade involving a series of protein kinases are useful for cellular signal transduction

because they________.


amplify the original signal many times


The receptors doe steroid hormones are located inside the cell instead of on the membrane surface

like most other signal receptors. This is NOT a problem for steroids because__________.

, steroid hormones are lipid soluble, so they can readily diffuse through the lipid bilayer on the cell

membrane.


Which stateerning how the molecular composition of a plant cell wall compare with the extracellular

matrix of animal cells?


Plant cell wall fibers consist primarily of carbohydrates ECM fibers are dominated by proteins.


The structure that anchors adjacent epithelial cells via their cytoskeleton is the _________


desmosome


Activated signal receptors on the plasma membrane can carry out which two activities?


Catalyze receptor phosphorylation; activate G proteins


Different cell types can respond differently to the same signaling molecule because _________.


each cell type converts the signal to a different metabolite.


When a lipid- soluble hormone enters a cell and binds a receptor, what happens to the receptor?


It enters the nucleus and activates genes.


Signaling pathways always work in complete isolation from one another.


False


In eukaryotic cells, chromosomes are composed of ________.


DNA and proteins


Forms of the Ras protein found in tumors would cause which of the following?


DNA replication to be hyperactive.

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