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2 years ago

How can the cytoskeleton of a cell be described?

Biology

1 answer:

Lorico [155]2 years ago

3 0

Answer:

framework and anchor for organelles

Explanation:

Cytoskeleton are made of three main filaments including actin filaments, microtubules and microfilaments. Microfilaments are flexible double strands of the protein actin that are of different proteins which give mechanical support. Important functions include:They lead the intracellular movement of organelles and molecules .They stabilize mechanically the plasma membrane.

Microtubules are rigid hollow cylinders of the proteins α- & β-tubulin . They are responsible for the position and stability of ER and Golgi-Apparatus . They help to divide & move chromosomes during mitosis and also organize the growth of the cell wall . Actin filaments are robe like fibres of different proteins which give mechanical support.

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What type of organism would most likely be found in place of the question marks?

ruslelena [56]

Answer:

Decomposers

Explanation:

The diagram in this question illustrates a food web, which is a series of interlinked food chains in an ecosystem. In a food chain as depicted in the image, the arrows point to the organism that feeds on another organism. For example, an arrow is pointing from Idaho fescue to an Elk meaning that the elk will feed on that plant.

Different trophic levels constituting organisms exists in the food web including; producers (plants), primary consumers, secondary consumers, tertiary consumers etc. However, as observed in the image, a general arrow carrying along all the organism is pointing towards the organism in the question mark. This organism is called DECOMPOSER.

A decomposer, usually a microorganism, is an organism that breaks down dead organisms and returns the nutrient to the soil for recycling. All organisms in the food web will eventually die and when they do, they'll be decomposed by a decomposer. This is why the arrow pointing towards the decomposers include all organisms.

8 0

2 years ago

Photosynthesis is an example of...

amid [387]

Answer:

Endothermic reaction

Explanation:

Photosynthesis is an endothermic reaction because sunlight is being absorbed during the reaction and the definition suggests that in a reaction if heat is being absorbed it is termed as an endothermic reaction.

5 0

2 years ago

Which of the following chemicals opens us binding sites allowing muscle filaments to connect to each other? Select one:

HACTEHA [7]

Answer:

The correct answer will be option-D.

Explanation:

Calcium plays an important role in muscle contraction as they are released from the sarcoplasmic reticulum after they receive electric impulse.

Calcium triggers the muscle contraction cycle as these calcium ions bind to the troponin-tropomyosin complex. This binding exposes the myosin-binding site on the actin on which high energy myosin binds and cross-bridge is formed.

This cross-bridge formation causes the contraction of the sarcomere and therefore muscle contracts.

Thus, option-D is the correct answer.

3 0

3 years ago

Discuss two friends parents least six exchange

krek1111 [17]

Answer:

A dialogue between father and son for permission

Son : I have a request to you.

Father: Tell me please.

Son : my class is going on a picnic to Murree..

Father: What is your purpose?

Son : I also want to go with my class.

Father: Who are going on picnic?

Son : Rashid, Faheem, Saleem, Yaseen all are going on picnic.

Father: For how many days is your class going to Murree?

Son : Only for one week.

Father: When will your class go?

Son : Today at night.

Father: O.K. you may go. How much money you want?

Son : Only one thouasnd.

Father: All right take your money. Keep mobile with you so that connection between you and me could remain alive.

Son : Mother! It is great pleasure, father has allowed me to go on picnic. Please give me three suites of different varieties and pack my bag.

Father: But I shall go to leave you with your mother at railway station because you are my only son.

Son : Father, please give me your camera so that I could take different photos of my friends and myself.

Father: It is a great pleasure for me that you have demanded money and camera for the first time.

Son : Pray for us because our train is about to leave the station.

Father: May you all comeback safe and sound.

Son : Goodbye

Father: Goodbye.

4 0

2 years ago

Which chemical reduces oxygen in the blood, causing a difference between the amount of oxygen the cells need and the amount of o

ohaa [14]

Hydrochloric acid reduces

3 0

2 years ago