Biochemistry
9th Edition
ISBN: 9781319114671
Author: Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher: W. H. Freeman
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 36, Problem 4P
Interpretation Introduction
Interpretation:
The two similarities and two difference between actin and the microtubules should be determined.
Concept introduction:
Microfilaments, microtubules and intermediate filaments are thread-like structures present in the cytoplasm. They are distinguished by diameter, protein type, and their assembly. These structures are connected to other proteins forming the cytoskeleton that provides strength and shape to cells. Microfilaments can be said as the tiny rods of protein actin that form bundles or meshworks. They are responsible for providing cellular motility. They constitute myofibrils that contract or shorten muscle cells.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Please help me with this question. More than one answer may be correct. THe graph relating to the information is included below.
The above figures show the rate of actin polymerization in the presence of various concentration of profilin (Pfn). In the top figure, flourescence intensity is a measure of total actin that has been polymerized, and this is plotted versus time in seconds. The shade of blue of the lines in the top figure correspond to the shaded blue bars representing various concentrations of profilin in the lower figure. The lower graph shows the initial rates of polymerization of actin plotted again concentration. Which of the following is true:
Question 21 options:
profilin in a molecular motor
profilin is a promoter of actin polymerization
profilin replaced G-actin in an F-actin strand and breaks the filament
profilin is an inhibitor of actin polymerization
profilin binds to G-actin, preventing it from polymerizing
nerve impulses. Neurotransmitters are packaged by the cell into small, membrane-
bound sacs called vesicles. Upon receiving a chemical signal, the vesicles move
towards the cell membrane and fuse with it, releasing the enclosed
neurotransmitters from the terminal end of the nerve cell. Which organelle is most
likely responsible for packaging neurotransmitters into a vesicle?
Mitochondria
Golgi body
Ribosomes
Nucleus
True or False. Both cytosolic intermediate filaments and microtubules display dynamic instability.
Select one:
a.
False
b.
True
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biochemistry and related others by exploring similar questions and additional content below.Similar questions
- Please ASAP. Thanku. Which of the following can undergo simple diffusion through a phospholipid bilayer? K+ H2O CO2 Glucosearrow_forwardNeed help, please. I know the answer isn't mitotic spindle or secretory and endocytic vesicle transport. I think the answer is option C, axon stiffening, and neurotransmitter vesicle transport, but I am not 100% sure. What function of the microtubule motor proteins dynein and kinesin is blocked by the use of colchicine to treat gout? Select one: O a. mitotic spindle b. secretory and endocytic vesicle transport c. axon stiffening and neurotransmitter vesicle transport O d. ER, Golgi, and mitochondria movementarrow_forwardTransport. Provided below is an abstracted equation describing an active cell membrane transport from outside the cell to the cytoplasm, involving a membrane carrier (Cmemb), a substrate (Sin) (growth factor etc.) to be carried and released (Sout) into the cytoplasm. a) What kind of feedback mechanism is restricting this process? b) Construct a Forrester Diagram Membrane Transport Carrier, C:C, +S. memb k₁ k_₁ C memb memb + S out Solid Lines. There are two applications in the construction of Forrester diagrams where solid lines can be used to connect state variables. Please name them: a) b)arrow_forward
- Please help me with this question. More than one answer may be correct. Kinesin _______. Options: A) uses ATP B) “walks” the same direction as dynein C) can bind to a kinesin receptor on a vesicle D) “walks” along a microtubule from the – side to + side E) “walks” along a microtubule from the + side to - sidearrow_forwardFrom the image. Do you think that a membrane potential exists for this synthetic plasma membrane? If your answer is “yes,” please indicate whether it is negative or positive at the region closer to the inner leaflet of the plasma membrane. Explain your reasoning.arrow_forwardQIV. Determine if the level of organization is molecular or cellular. Tick True if molecular. Tick False if cellular. Prokaryotic cells have no membrane-bound nucleus, and the organelles have no surrounding membranes. Select one: O True O Falsearrow_forward
- Salmoneus dies.When a cell dies its plasma membrane becomes“leaky”;i.e.,it becomes permeable to ions that were unable to freely cross the membrane during life. Thus, after death, calcium ions leak across the sarcolemma of muscle fibers. This calcium leak causes rigor mortis, a temporary stiffness of the muscles after death. Apply your understanding of the mechanism of skeletal muscle contraction (specifically regarding events within muscle fibre) and explain the molecular basis of the phenomenon known as rigor mortis.arrow_forwardILLUSTRATIONS. For each of the given proteins: Draw the final location of the following proteins after being translocated. • Label the organelle (as well as the organelle parts/compartments) and the cytosol (if necessary) in order to clearly depict the protein's location and orientation. • Label the amino and carboxyl ends of the protein. Below your drawing, indicate: a. the receptor/s b. the energy source c. if there is signal peptide cleavage or none A. Peroxisome: Class I PMP H₂N- ITS* *Internal targeting sequence -COOHarrow_forwardMolecular Designs ...where molecules become real ™M wwwwwwwww Remove models from the Insert the GLUT carri plasma membrane model molecules so that there are more glucose molecules than intracellular g molecules (right photo). CONRAD Phospholipid Activity 1 Continued SANDER PHOSPHOLIPID & MEMBRANE TRANSPORT KIT Compare your structure to that of the other gre GLUT carrier protein membrane dmoleculardesigns.com g. Sketch the specific structural formula of the phospholipid model you synthesized in the space provided below. Label the hydrophilic and hydrophobic regions of your structure.arrow_forward
- True or False. Plant cells contain many of the same organelles as animal cells, with the addition of chloroplast, a vacuole, and glyoxysomes. Explain your answer.arrow_forwardFrom the image provided. Do you think that a membrane potential exists for this synthetic plasma membrane? If your answer is “yes,” please indicate whether it is negative or positive at the region closer to the inner leaflet of the plasma membrane. Explain your reasoning.arrow_forwardIDENTIFICATION. One of the B-complex vitamins which is the precursor of Nicotinamide in the coenzyme NAD+. Carrier of the activated amino acids to the ribosomes for incorporation into the growing peptide chain. Molecule that attaches to myosin and actin during muscle contraction.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- BiochemistryBiochemistryISBN:9781319114671Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.Publisher:W. H. Freeman
Lehninger Principles of BiochemistryBiochemistryISBN:9781464126116Author:David L. Nelson, Michael M. CoxPublisher:W. H. Freeman
Fundamentals of Biochemistry: Life at the Molecul...BiochemistryISBN:9781118918401Author:Donald Voet, Judith G. Voet, Charlotte W. PrattPublisher:WILEY 
BiochemistryBiochemistryISBN:9781305961135Author:Mary K. Campbell, Shawn O. Farrell, Owen M. McDougalPublisher:Cengage Learning
BiochemistryBiochemistryISBN:9781305577206Author:Reginald H. Garrett, Charles M. GrishamPublisher:Cengage Learning
Fundamentals of General, Organic, and Biological ...BiochemistryISBN:9780134015187Author:John E. McMurry, David S. Ballantine, Carl A. Hoeger, Virginia E. PetersonPublisher:PEARSON
Biochemistry
Biochemistry
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:W. H. Freeman
Lehninger Principles of Biochemistry
Biochemistry
ISBN:9781464126116
Author:David L. Nelson, Michael M. Cox
Publisher:W. H. Freeman
Fundamentals of Biochemistry: Life at the Molecul...
Biochemistry
ISBN:9781118918401
Author:Donald Voet, Judith G. Voet, Charlotte W. Pratt
Publisher:WILEY
Biochemistry
Biochemistry
ISBN:9781305961135
Author:Mary K. Campbell, Shawn O. Farrell, Owen M. McDougal
Publisher:Cengage Learning
Biochemistry
Biochemistry
ISBN:9781305577206
Author:Reginald H. Garrett, Charles M. Grisham
Publisher:Cengage Learning
Fundamentals of General, Organic, and Biological ...
Biochemistry
ISBN:9780134015187
Author:John E. McMurry, David S. Ballantine, Carl A. Hoeger, Virginia E. Peterson
Publisher:PEARSON