Homework Answers
EXTRACELLULAR MATRIX :-
The Extracellular matrix (ECM) is a three-dimensional network of extracellular macromolecules, such as collagen, enzymes, and glycoproteins, that provide structural and biochemical support to surrounding cells.
Components.:-
1) Fibrous proteins:- Collagen, Elastin, Fibronectin, Laminin
2) Proteoglyacans :- chondroitin sulfate, Dermatan sulfate, Heparan sulafate, Keratan sulafate
3) Free Glycosaminoglycans :- Hyaluronan
So, from the list of components given in the question, only Collagen & Fibronectin are present in the EXTRACELLULAR MATRIX.
Actin & Myosin are a variety of Contractile proteins & not present in the ECM.
CORRECT ANSWERS :-
Option a & c
Hope you'll understand the concept. Please like. Thankyou
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Select all of the following that are part of the extracellular matrix. Collagen Actin Fibronectin Myosin
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1.Fibronectin is a connector molecule that links _____ on the cell surface to _____ in the extracellular matrix a.Integrins/actin b.Actin/Integrins c.Integrins/collagen d.Collagen/integrins
The tri-peptide sequence, RGD, is found in the extracellular matrix (ECM) protein fibronectin and serves as...
The tri-peptide sequence, RGD, is found in the extracellular matrix (ECM) protein fibronectin and serves as a recognition sequence for integrins (integral membrane proteins) in the cell wall. The integrin-RGD interaction anchors cells to the ECM.
Muscle contraction: Select one O a occurs when myosin pulls on actin and the sarcomere shortens...
Muscle contraction: Select one O a occurs when myosin pulls on actin and the sarcomere shortens b. occurs when actin pushes on myosin and the sarcomere elongates O c occurs when the myosin tail splits the actin filament in half Od occurs when actin and myosin entangle, generating more distance between Z lines
Match Protein & Function 1. Match PROTEIN to actin, myosin antibodies calcium binding protein collagen hemoglobin...
Match Protein & Function
1. Match PROTEIN to actin, myosin antibodies calcium binding protein collagen hemoglobin lipoproteins plasma proteins transferrin FUNCTION a. transport (calcium) b. transport (oxygen) c. transport (iron) d. transport (lipids) and fat soluble vitamins e. maintain osmotic pressure f. structure of muscle g. cell cement, ligaments h. fight disease
13. Alphydrolysis = ADP + P Look at all the myosin binding sites on the actin...
13. Alphydrolysis = ADP + P Look at all the myosin binding sites on the actin filament. Does it appear that each site lines up perfectly with a myosin head? a. Myosin can only bind to a binding site that is at the tip of a helix in the actin filament (like the one in Phase 1 of the model). After the power stroke (pulling Phase) and detachment is the myosin head lined up with a binding site at the...
b) Which of the following are true statements about myosin? Select all the true statements. Each...
b) Which of the following are true statements about myosin? Select all the true statements. Each myosin head has a binding site for actin and ATP The interaction between myosin and actin converts chemical energy to mechanicall work muscle contraction, thick and thin filaments slide past each other causing an overall lengthening of the muscle. In a muscle cell, myosin tails group together to form a thick filament The myosin-actin reaction cycle is powered by ATP hydrolysis The tail of...
Question 15 (2 points) ✓ Saved Select all of the following that are part of the...
Question 15 (2 points) ✓ Saved Select all of the following that are part of the extracellular matrix. Actin Fibronectin Myosin Collagen Question 16 (4 points) ✓ Saved Please put the following activities of translation initiation in order from first to last. 1 v Small subunit of ribosome binds to mRNA 4 v A-site is open 2 tRNA with anticodon UAC binds to mRNA codon AUG 3 large subunit of ribosome binds to mRNA Question 17 (2 points) ✓ Saved...
Collagen is a ubiquitous material in extracellular matrix (ECMs) and its derivatives are used in human...
Collagen is a ubiquitous material in extracellular matrix (ECMs) and its derivatives are used in human medicine. One derivative, the spongy material Gelfoam™, is used in surgical procedures. A soluble form of collagen is used as a dermal filler. Both of these were approved by the FDA over a decade ago. How do these products differ chemically? What issues might arise in today’s regulatory environment for obtaining approval for these materials?
b) hyaluronic acid O c) proteoglycase O d) fibronectin 27. In animals, the extracellular matrix plays...
b) hyaluronic acid O c) proteoglycase O d) fibronectin 27. In animals, the extracellular matrix plays important roles in each of the following processes EXCEPT (1 Point) O E) cell adhesion O D ) cell differentiation O C) cell motility O A ) cell division O B) DNA replication Submit Never give out your password Report abuse earch Polo
Which of the following is true concerning actin filaments and their associated proteins? Myosin can cause...
Which of the following is true concerning actin filaments and their associated proteins? Myosin can cause actin filament sliding. Actin has intrinsic ATPase activity. All of these ARPs are required for formation of actin bundles at structures called lamellipodia.
The tri-peptide sequence, RGD, is found in the extracellular matrix (ECM) protein fibronectin and serves as a recognition sequence for integrins (integral membrane proteins) in the cell wall. The integrin-RGD interaction anchors cells to the ECM.
Muscle contraction: Select one O a occurs when myosin pulls on actin and the sarcomere shortens b. occurs when actin pushes on myosin and the sarcomere elongates O c occurs when the myosin tail splits the actin filament in half Od occurs when actin and myosin entangle, generating more distance between Z lines
Match Protein & Function
1. Match PROTEIN to actin, myosin antibodies calcium binding protein collagen hemoglobin lipoproteins plasma proteins transferrin FUNCTION a. transport (calcium) b. transport (oxygen) c. transport (iron) d. transport (lipids) and fat soluble vitamins e. maintain osmotic pressure f. structure of muscle g. cell cement, ligaments h. fight disease
13. Alphydrolysis = ADP + P Look at all the myosin binding sites on the actin filament. Does it appear that each site lines up perfectly with a myosin head? a. Myosin can only bind to a binding site that is at the tip of a helix in the actin filament (like the one in Phase 1 of the model). After the power stroke (pulling Phase) and detachment is the myosin head lined up with a binding site at the...
b) Which of the following are true statements about myosin? Select all the true statements. Each myosin head has a binding site for actin and ATP The interaction between myosin and actin converts chemical energy to mechanicall work muscle contraction, thick and thin filaments slide past each other causing an overall lengthening of the muscle. In a muscle cell, myosin tails group together to form a thick filament The myosin-actin reaction cycle is powered by ATP hydrolysis The tail of...
Question 15 (2 points) ✓ Saved Select all of the following that are part of the extracellular matrix. Actin Fibronectin Myosin Collagen Question 16 (4 points) ✓ Saved Please put the following activities of translation initiation in order from first to last. 1 v Small subunit of ribosome binds to mRNA 4 v A-site is open 2 tRNA with anticodon UAC binds to mRNA codon AUG 3 large subunit of ribosome binds to mRNA Question 17 (2 points) ✓ Saved...
b) hyaluronic acid O c) proteoglycase O d) fibronectin 27. In animals, the extracellular matrix plays important roles in each of the following processes EXCEPT (1 Point) O E) cell adhesion O D ) cell differentiation O C) cell motility O A ) cell division O B) DNA replication Submit Never give out your password Report abuse earch Polo
Which of the following is true concerning actin filaments and their associated proteins? Myosin can cause actin filament sliding. Actin has intrinsic ATPase activity. All of these ARPs are required for formation of actin bundles at structures called lamellipodia.
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