Biology
10th Edition
ISBN: 9780073383071
Author: Raven
Publisher: MCGRAW-HILL HIGHER EDUCATION
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 4, Problem 4A
Different motor proteins like kinesin and myosin are similar in that they can
a. interact with microtubules.
b. use energy from ATP to produce movement.
c. interact with actin.
d. do both a and b.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
In muscle cells, myosin molecules continue moving along actin molecules as long as:
A. ATP is present and intracellular Ca2+ is high.
B. ADP is present and intracellular acetylcholine is high.
C. ATP is present and troponin is not bound to Ca2+.
D.ATP is present and intracellular Ca2+ is low.
E. ADP is present and tropomyosin is released from intracellular stores.
QUESTION 27
Lamellipodia and filopodia frequently occur near the edges of cells. These membrane features:
A. are supported by intermediate filaments, such as keratin.
B. result from the polymerization of actin filaments.
C. result from the contraction of actin-myosin.
D. probably do not serve any useful purpose to the cell.
E. are directly linked to the microtubule organizing center.
QUESTION 28
Sort the following events to reflect the sequence during smooth muscle contraction upon delivery of muscle stimu
3. Activation of the myosin light-chain kinase
5. Interaction of myosin head with actin
4. Phosphorylation of myosin
1.…
Which of the following statements is true of the chameleon tongue but not of the human tongue?
A. It is a muscular hydrostat.
B. Force generation reflects the binding of myosin crossbridges to actin thin filaments.
C. The organization of the actin and myosin filaments produces a regular pattern of bands, or
striations.
D. Gaps or holes in the Z-discs allow supercontraction (shortening beyond the normal limit).
E. All of the above statements are true of both the chameleon tongue and the human tongue.
When a skeletal muscle cell contracts and the muscle shortens,
a. the position of an actin molecule relative to a myosin molecule does not change.
b. myosin heads generate a single power stroke.
c. the actin ATPase allows the actin molecule to swivel.
d. the actin molecule swivels during the power stroke
e. some myosin heads are forming crossbridges as others are releasing them.
Chapter 4 Solutions
Biology
Ch. 4 - Which of the following statements is NOT part of...Ch. 4 - All cells have all of the following except a....Ch. 4 - Eukaryotic cells are more complex than prokaryotic...Ch. 4 - Which of the following are differences between...Ch. 4 - The cytoskeleton includes a. microtubules made of...Ch. 4 - The smooth endoplasmic reticulum is a. involved in...Ch. 4 - Plasmodesmata in plants and gap junctions in...Ch. 4 - The most important factor that limits the size of...Ch. 4 - All eukaryotic cells possess each of the following...Ch. 4 - Adherens junctions, which contain cadherin, are...
Ch. 4 - Different motor proteins like kinesin and myosin...Ch. 4 - The protein sorting pathway involves the following...Ch. 4 - Chloroplasts and mitochondria have many common...Ch. 4 - Prob. 7ACh. 4 - The smooth endoplasmic reticulum is the site of...Ch. 4 - Use the information provided in table 4.3 to...Ch. 4 - Prob. 3SCh. 4 - The protist Giardia intestinalis is the organism...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Rigor mortis occurs following death because a. tropomyosin remains over the myosin binding sites of actin. b. myosin heads attach to actin and are not released due to lack of ATP. c. the myosin becomes misshapen. d. all of the Ca2+ remains within the sarcoplasmic reticulum.arrow_forwardThe functions of tropomyosin in skeletal muscle include A. releasing calcium ions after initiation of contraction. B. generating ATP which it passes to the contractile mechanism. C. binding to myosin during contraction. D. acting as a relaxing protein at rest by covering up the sites where myosin binds to actin. E. sliding on actin to produce shortening.arrow_forwardActin and myosin are long-filament proteins used in the contraction of muscles. They are examples of ________ proteins. A. Fibrous B. globular C. conjugated D. regulatoryarrow_forward
- Which of the following thin filament structures directly interacts with the myosin heads to form a cross bridge? a. Myosin b. Troponin c. Tropomyosin d. F actin e. G actinarrow_forwardWhat do skeletal muscle contractions share in common with smooth muscle contractions?a. Both types of contractions do not require calcium ions for a contraction to occur.b. Both types of contractions generate little force or a weak force.c. Both types of contractions consume very little ATP.d. Both types of contractions result from thick and thin filaments sliding past one another.arrow_forwardA mutation has occurred that prevents ATP from binding from the heads of myosin. What impact would this have (if any) on human muscle contraction? Select one: a. ATP has no impact on myosin binding. Myosin, unlike kinesins, works with GTP. b. Without ATP, myosin will be stuck to microfilaments, causing muscles to be “stuck” in whatever position they were last in. c. Without ATP, myosin will not be able to bind to microtubules and move vesicles or chromosomes around the cell resulting in cell death. d. Without ATP, myosin will be stuck to intermediate filaments “locking” organelles in place in the cell.arrow_forward
- When sarcomeres contract during muscle contraction, which of the following occurs? A. The myosin filaments lengthen. B. The myosin filaments "walk" along the actin microfilaments. C. The myosin filaments shorten. D. The actin filaments shorten.arrow_forwardWhat is the role of ATP in muscle function? a. ATP provides energy that enables myosin to form cross bridges with actin. b. ATP enables myosin to detach from actin. c. ATP provides energy to transport calcium back into storage. d. all of the abovearrow_forwardThe Sarcomere 2 Thin filaments are often named for which protein? a. actin b. myosin c. troponin d. tropomyosinarrow_forward
- The actin myosin bond is broken by the attachment of A. Tropomyosin B. Phosphate C. ATP D. ADParrow_forwardThe sliding filament mechanism describes the process during which: a. actin and myosin slide relative to each other b. sarcomeres slide relative to each other c. troponin and tropomyosin slide relative to each other d. muscle fibers slide past each otherarrow_forwardWhat does ATP binding to myosin head triggers? a. Its association with microtubules b. Its dissociation from actin microfilament c. Conformational change and rotation of myosin head d. Its association with actin microfilamentarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
GCSE PE - ANTAGONISTIC MUSCLE ACTION - Anatomy and Physiology (Skeletal and Muscular System - 1.5); Author: igpe_complete;https://www.youtube.com/watch?v=6hm_9jQRoO4;License: Standard Youtube License