1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Levart [38]
3 years ago
11

1. In eukaryotic flagella, the fibers that slide past one another due to the activity of dynein proteins are microtubules. 2. Ma

ny cell organelles, most notably the nucleus, are anchored by microtubules which are assembled from a diverse class of proteins. 3. Centrosomes are sites where protein dimers assemble into microfilaments. 4. The extension of pseudopodia in amoeba is due to the regulated assembly and destruction of microtubules. 5. The only cytoskeletal fibers not associated with intracellular movement or whole cell locomotion are the intermediate filaments. 6. During muscle contractions, myosin motor proteins move across tracks of microtubules.
Biology
2 answers:
Serhud [2]3 years ago
8 0

Answer:

1. In eukaryotic flagella, the fibers that slide past one another due to the activity of dynein proteins are microtubules. <u>True</u>

2. Many cell organelles, most notably the nucleus, are anchored by microtubules which are assembled from a diverse class of proteins. <u> </u><u>False</u>

3. Centrosomes are sites where protein dimers assemble into microfilaments. <u>False</u>

4. The extension of pseudopodia in amoeba is due to the regulated assembly and destruction of microtubules. <u>False</u>

5. The only cytoskeletal fibers not associated with intracellular movement or whole cell locomotion are the intermediate filaments. <u>True</u>

6. During muscle contractions, myosin motor proteins move across tracks of microtubules. <u>False</u>

Explanation:

2. Most cell organelles are anchored by intermediate filaments, this kind of filaments are formed by fibrous proteins and they are one of the main elements of the cytoskeleton.

3. Centrosomes are sites where protein dimers assemble into microtubules that the cell needs to move organelles, vesicles, and chromosomes during cell division.

4. The extension of pseudopodia in amoeba is due to the regulated assembly and destruction of microfilaments, which have a similar function to microtubules as they also provide movement. Intermediate filaments are part of the structure, but they do not provide any movement.

6. During muscle contractions, myosin motor proteins move across tracks of microfilaments, as they are a structural component, they form tracks so that the proteins can go to a specific site.

In conclusion, Microfilaments are the ones that serve as tracks for the movement of myosin.

Microtubules provide structural support and movement to vesicles and organelles, they do this by adding and removing tubulin from their ends. The tubulin that is removed from one end is added to the other end.

Intermediate filaments have a structural role anchoring organelles and keeping the shape of the cell. Their size is intermediate between the microtubules, which are the largest, and microfilaments, which are the smallest.

yulyashka [42]3 years ago
4 0

Answer:

1) In eukaryotic flagella, the fibers that slide past one another due to the activity of dynein proteins are microtubules.

2) Many cell organelles, most notably the nucleus, are anchored by intermediate filaments which are assembled from a diverse class of proteins.

3) Centrosomes are sites where protein dimers assemble into microtubules.

4) The extension of pseudopodia in amoeba is due to the regulated assembly and destruction of microfilaments.

5) The only cytoskeletal fibers not associated with intracellular movement or whole cell locomotion are the intermediate filaments.

6) During muscle contractions, myosin motor proteins move across tracks of microfilaments.

Explanation:

The cytoskeleton is a very important element of the cell, and is composed of three different structures: microtubules, intermediate filaments, and microfilaments.

<u>Microtubules</u> are structures in the shape of hollow tubes that <u>give shape to the cell</u>. Microtubules also participate in cell motility by <u>providing a route</u> for the organelles to move through.

Intermediate filaments are the only ones that do not participate in cell motility: their main function is to <u>provide mechanical support for the plasma membrane</u>.

Microfilaments are a key component in <u>cell motility</u>, and also associate with myosin (a protein) to produce <u>muscle contraction</u>. Microfilaments also give the cell the ability to grow <u>pseudopods</u>.

You might be interested in
Describe the processes involved in both internal &amp; external respiration.
tensa zangetsu [6.8K]

Answer:External respiration occurs in the lungs where oxygen diffuses into the blood and carbon dioxide diffuses into the alveolar air. Internal respiration occurs in the metabolizing tissues, where oxygen diffuses out of the blood and carbon dioxide diffuses out of the cells.

Explanation:

7 0
3 years ago
which of the following are the building blocks of protein a. monosaccharides b.amino acids c.RNA d. starches
Crazy boy [7]
I doubt if the answer is aminoacids
5 0
3 years ago
The scientific method is limited to investigating physical phenomena that are which of the following? Select all that apply.
Kobotan [32]
Unique I thinki .....
4 0
3 years ago
Read 2 more answers
Define the verb "adapt". Does survival in a particular environment through coping is synonymous with evolution? Why or why not?
notsponge [240]

Answer:

The word adapt means to get adjusted to a change.

yes, survival in a certain environment is similar to evolution. Both must use adaptation in order for life to keep living through changes in the environment. Each help life sustain itself in a very unique way.

Explanation:

4 0
3 years ago
Which component of the earth's atmosphere is decreased due to photosynthesis?
Kobotan [32]
It would be Carbon Dioxide.
4 0
3 years ago
Other questions:
  • The plasma membrane is responsible for which set of functions listed below?
    15·1 answer
  • A herd of deer lives in a forest where they eat the leaves of trees. The
    10·1 answer
  • At which time does the nurse anticipate that the woman will need the most pain relief measures
    9·1 answer
  • The epithelial tissue found in areas subject to considerable friction and abuse, such as the skin, is
    10·1 answer
  • REALLY EASY!!! JUST CAN'T CHOOSE !!!! WILL GIVE BRAINLIEST!!!! AT LEAST TAKE A LOOK!!! ANSWER IF 100% SURE THO!!!
    7·1 answer
  • HELP PLEASE IM STUCK ON THESE QUESTIONS
    6·1 answer
  • How did the invention of synthesized ammonium affect humanity?
    14·1 answer
  • Jacob is studying cell organelles. He knows that light energy drives photosynthesis. Look closely at the diagram below.
    11·2 answers
  • Question 11 of 25
    6·1 answer
  • DNA contains coded information for _____.
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!